Find Cheap Flights from Seattle/Tacoma Intl to Chicago (SEA - CHI)

Search hundreds of travel sites at once for deals on flights to Chicago

Fri 1/19
Fri 1/26
Any month
Compare vs. KAYAK |

Good to Know

Low Season:
October
Best time to beat the crowds
2%
expected price decrease
High Season:
June
Most popular time to fly
9%
expected price increase
Average Price:
$362
(avg. price over the last 2 weeks)
Good Deal:
$245
or less (round trip)

When to Book Flights from Seattle/Tacoma Intl to Chicago

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $245 or less.
The cheapest flight from Seattle/Tacoma Intl to Chicago was found 35 days before departure, on average.
Book at least 2 weeks before departure in order to get a below-average price.
High season is considered to be May, June and July. The cheapest month to fly is October.
Morning departure is around 3% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Seattle/Tacoma Intl to Chicago Flights

How long does a flight from Seattle/Tacoma Intl to Chicago take?
An average nonstop flight takes 6h 07m, covering a distance of 1731 miles.
How many flights are there between Seattle/Tacoma Intl and Chicago?
There are 498 (nonstop) flights between Seattle/Tacoma Intl and Chicago per week, averaging 73 per day.
Which airlines provide the cheapest flights from Seattle/Tacoma Intl to Chicago?
In the past 3 days, the cheapest round-trip tickets were found on Frontier ($145)
Do I need a passport to fly between Seattle/Tacoma Intl and Chicago?
No.
Which airlines fly most frequently between Seattle/Tacoma Intl and Chicago?
Alaska Airlines (13 times daily), United (7 times daily), American Airlines (5 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly Seattle/Tacoma Intl to Chicago?
For Seattle/Tacoma Intl to Chicago, Tuesday is the cheapest day to fly on average and Monday is the most expensive. Flying from Chicago back to Seattle/Tacoma Intl, the best deals are generally found on Tuesday, with Saturday being the most expensive.

Book cheap flights from Seattle/Tacoma Intl to Chicago (round-trip)

Airports
Origin
Seattle
$145
only
$145
Destination
Chicago
$145
only
$145
Tue, Apr 10
SEA
ORD
6h 07m
Tue, Apr 17
ORD
SEA
6h 43m
Trip: 8 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Mediocre 3.6

Price

Two hour flight delay in the middle of the night due to "computers restarting."

SEA
ORD
Mediocre 2.6

Well, this flight was a disaster. It already was a redeye as we were going to get into Chicago at 5:00am. But then our flight got delayed 3 hours in Seattle due to "technical difficulties" and we didn't touch down in Chicago until 7:45....then you know what happens? The flight doesn't have a gate because we were so late, and thus we had to wait in the plane for another 45 minutes. It was at this point frontier emailed me a voucher, which I was fine with....but then getting my luggage (which you have to pay extra for to be checked in) was shredded entirely on its side, as if they had dragged it on its side. Nice service.

SEA
ORD
Mediocre 2.6

Nothing

They usually have military board first. Frontier didn't. Didn't offer drinks. Uncomfortable seats. SUPER uncomfortable seats.

SEA
ORD
Mediocre 2.0

Honestly the WORST experience ever with a flight. Angry Kayak doesn't post the cost of luggage and carry one with them. Flight delayed 5 hours for non existent weather, leading to 1 hour sitting on the tarmac because they didn't have a gate at the largest airport. Then, they destroyed brand new luggage.

I hated the whole thing. Seats and tray tables are a joke

SEA
ORD
Good 6.3

The price of my ticket , the kindness of the crew .

The seats didn't recline , no outlets or WiFi. But it was ok

Tue, Apr 17
SEA
ORD
6h 07m
Tue, Apr 24
ORD
SEA
6h 43m
Trip: 8 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Okay 5.6

Crew was friendly.

No snacks, no coffee, no soda.

SEA
ORD
Good 6.3

The price of my ticket , the kindness of the crew .

The seats didn't recline , no outlets or WiFi. But it was ok

SEA
ORD
Okay 4.6

Boarding was a breeze. Crew was really nice and not uptight.

Seats are not comfortable. Sitting down in plywood would be more comfortable than these seats :(.

SEA
ORD
Mediocre 3.6

Tough! other than the only flight available for the time, I would not have chosen it.

Extremely commercial in the name of budget airlines! The flight wasn't cheap or anything! But money speaks everywhere and ALL the time with this airlines. $2 for a can of soda. Carry on bags- pay! For whatever reason you decide to buy it at the airport- extra! Seats- very uncomfortable and you couldn't get better even if you paid because the whole flight has the same kind! Use this airlines at your own discomfort!

SEA
ORD
Mediocre 3.6

Lights turned off at night, not a lot of announcements to disturb sleeping passengers. Plane was clean. Crew seemed fine enough.

To begin with, a three-hour delay on what was already just a four-hour flight, and no steps made to even offer snacks or discounts or other amenities to apologize for the gross delay. Very uncomfortable seats; even dead tired, I could not get much sleep. I usually use the food tray as a place to rest my head, but it was far too small to use for that. Upon landing, another 45 minutes of delay as we waited for our gate to become free, and again, no measures taken to apologize or make us as customers feel like they wanted us to feel even a little bit better about the situation. I get that it's a cheap flight option, but even so, the company needs to take more responsibility for its internal problems.

Tue, Apr 17
SEA
ORD
6h 07m
Tue, Apr 24
ORD
SEA
6h 43m
Trip: 8 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Excellent 8.0

Simple and comfortable

SEA
ORD
Mediocre 3.6

Lights turned off at night, not a lot of announcements to disturb sleeping passengers. Plane was clean. Crew seemed fine enough.

To begin with, a three-hour delay on what was already just a four-hour flight, and no steps made to even offer snacks or discounts or other amenities to apologize for the gross delay. Very uncomfortable seats; even dead tired, I could not get much sleep. I usually use the food tray as a place to rest my head, but it was far too small to use for that. Upon landing, another 45 minutes of delay as we waited for our gate to become free, and again, no measures taken to apologize or make us as customers feel like they wanted us to feel even a little bit better about the situation. I get that it's a cheap flight option, but even so, the company needs to take more responsibility for its internal problems.

SEA
ORD
Okay 5.3

Quiet Fliight

Late getting into Seattle. Crew seemed in no rush to make up lost time.

SEA
ORD
Okay 4.6

Boarding was a breeze. Crew was really nice and not uptight.

Seats are not comfortable. Sitting down in plywood would be more comfortable than these seats :(.

SEA
ORD
Okay 5.6

Crew was friendly.

No snacks, no coffee, no soda.

Tue, Apr 24
SEA
ORD
6h 07m
Tue, May 1
ORD
SEA
6h 50m
Trip: 8 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Mediocre 2.0

Honestly the WORST experience ever with a flight. Angry Kayak doesn't post the cost of luggage and carry one with them. Flight delayed 5 hours for non existent weather, leading to 1 hour sitting on the tarmac because they didn't have a gate at the largest airport. Then, they destroyed brand new luggage.

I hated the whole thing. Seats and tray tables are a joke

SEA
ORD
Okay 4.6

Boarding was a breeze. Crew was really nice and not uptight.

Seats are not comfortable. Sitting down in plywood would be more comfortable than these seats :(.

SEA
ORD
Mediocre 3.6

Tough! other than the only flight available for the time, I would not have chosen it.

Extremely commercial in the name of budget airlines! The flight wasn't cheap or anything! But money speaks everywhere and ALL the time with this airlines. $2 for a can of soda. Carry on bags- pay! For whatever reason you decide to buy it at the airport- extra! Seats- very uncomfortable and you couldn't get better even if you paid because the whole flight has the same kind! Use this airlines at your own discomfort!

SEA
ORD
Mediocre 3.6

Price

Two hour flight delay in the middle of the night due to "computers restarting."

SEA
ORD
Mediocre 2.6

Well, this flight was a disaster. It already was a redeye as we were going to get into Chicago at 5:00am. But then our flight got delayed 3 hours in Seattle due to "technical difficulties" and we didn't touch down in Chicago until 7:45....then you know what happens? The flight doesn't have a gate because we were so late, and thus we had to wait in the plane for another 45 minutes. It was at this point frontier emailed me a voucher, which I was fine with....but then getting my luggage (which you have to pay extra for to be checked in) was shredded entirely on its side, as if they had dragged it on its side. Nice service.

Tue, May 1
SEA
ORD
6h 25m
Tue, May 8
ORD
SEA
6h 50m
Trip: 8 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Good 6.3

The price of my ticket , the kindness of the crew .

The seats didn't recline , no outlets or WiFi. But it was ok

SEA
ORD
Excellent 8.0

Simple and comfortable

SEA
ORD
Okay 4.6

Boarding was a breeze. Crew was really nice and not uptight.

Seats are not comfortable. Sitting down in plywood would be more comfortable than these seats :(.

SEA
ORD
Okay 5.3

Quiet Fliight

Late getting into Seattle. Crew seemed in no rush to make up lost time.

SEA
ORD
Mediocre 2.0

Honestly the WORST experience ever with a flight. Angry Kayak doesn't post the cost of luggage and carry one with them. Flight delayed 5 hours for non existent weather, leading to 1 hour sitting on the tarmac because they didn't have a gate at the largest airport. Then, they destroyed brand new luggage.

I hated the whole thing. Seats and tray tables are a joke

Tue, May 8
SEA
ORD
6h 25m
Tue, May 22
ORD
SEA
6h 50m
Trip: 15 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Mediocre 2.0

Honestly the WORST experience ever with a flight. Angry Kayak doesn't post the cost of luggage and carry one with them. Flight delayed 5 hours for non existent weather, leading to 1 hour sitting on the tarmac because they didn't have a gate at the largest airport. Then, they destroyed brand new luggage.

I hated the whole thing. Seats and tray tables are a joke

SEA
ORD
Mediocre 3.6

Lights turned off at night, not a lot of announcements to disturb sleeping passengers. Plane was clean. Crew seemed fine enough.

To begin with, a three-hour delay on what was already just a four-hour flight, and no steps made to even offer snacks or discounts or other amenities to apologize for the gross delay. Very uncomfortable seats; even dead tired, I could not get much sleep. I usually use the food tray as a place to rest my head, but it was far too small to use for that. Upon landing, another 45 minutes of delay as we waited for our gate to become free, and again, no measures taken to apologize or make us as customers feel like they wanted us to feel even a little bit better about the situation. I get that it's a cheap flight option, but even so, the company needs to take more responsibility for its internal problems.

SEA
ORD
Good 6.3

The price of my ticket , the kindness of the crew .

The seats didn't recline , no outlets or WiFi. But it was ok

SEA
ORD
Mediocre 3.6

Price

Two hour flight delay in the middle of the night due to "computers restarting."

SEA
ORD
Okay 5.6

Crew was friendly.

No snacks, no coffee, no soda.

Tue, May 15
SEA
ORD
6h 25m
Tue, May 22
ORD
SEA
6h 50m
Trip: 8 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Mediocre 2.0

Literally nothing, other than it got me from A to B.

Rude and mean crew, uncomfortable seats, terrible boarding process and terrible amenities. I hated everything about this flight and Frontier airlines.

SEA
ORD
Mediocre 3.6

Price

Two hour flight delay in the middle of the night due to "computers restarting."

SEA
ORD
Mediocre 2.6

Well, this flight was a disaster. It already was a redeye as we were going to get into Chicago at 5:00am. But then our flight got delayed 3 hours in Seattle due to "technical difficulties" and we didn't touch down in Chicago until 7:45....then you know what happens? The flight doesn't have a gate because we were so late, and thus we had to wait in the plane for another 45 minutes. It was at this point frontier emailed me a voucher, which I was fine with....but then getting my luggage (which you have to pay extra for to be checked in) was shredded entirely on its side, as if they had dragged it on its side. Nice service.

SEA
ORD
Okay 5.6

Crew was friendly.

No snacks, no coffee, no soda.

SEA
ORD
Mediocre 3.6

Lights turned off at night, not a lot of announcements to disturb sleeping passengers. Plane was clean. Crew seemed fine enough.

To begin with, a three-hour delay on what was already just a four-hour flight, and no steps made to even offer snacks or discounts or other amenities to apologize for the gross delay. Very uncomfortable seats; even dead tired, I could not get much sleep. I usually use the food tray as a place to rest my head, but it was far too small to use for that. Upon landing, another 45 minutes of delay as we waited for our gate to become free, and again, no measures taken to apologize or make us as customers feel like they wanted us to feel even a little bit better about the situation. I get that it's a cheap flight option, but even so, the company needs to take more responsibility for its internal problems.

Tue, May 15
SEA
ORD
6h 25m
Tue, May 22
ORD
SEA
6h 50m
Trip: 8 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Good 6.3

The price of my ticket , the kindness of the crew .

The seats didn't recline , no outlets or WiFi. But it was ok

SEA
ORD
Mediocre 3.6

Price

Two hour flight delay in the middle of the night due to "computers restarting."

SEA
ORD
Okay 5.6

Crew was friendly.

No snacks, no coffee, no soda.

SEA
ORD
Mediocre 2.0

Honestly the WORST experience ever with a flight. Angry Kayak doesn't post the cost of luggage and carry one with them. Flight delayed 5 hours for non existent weather, leading to 1 hour sitting on the tarmac because they didn't have a gate at the largest airport. Then, they destroyed brand new luggage.

I hated the whole thing. Seats and tray tables are a joke

SEA
ORD
Mediocre 3.6

Lights turned off at night, not a lot of announcements to disturb sleeping passengers. Plane was clean. Crew seemed fine enough.

To begin with, a three-hour delay on what was already just a four-hour flight, and no steps made to even offer snacks or discounts or other amenities to apologize for the gross delay. Very uncomfortable seats; even dead tired, I could not get much sleep. I usually use the food tray as a place to rest my head, but it was far too small to use for that. Upon landing, another 45 minutes of delay as we waited for our gate to become free, and again, no measures taken to apologize or make us as customers feel like they wanted us to feel even a little bit better about the situation. I get that it's a cheap flight option, but even so, the company needs to take more responsibility for its internal problems.

Tue, Jun 5
SEA
ORD
6h 25m
Tue, Jun 12
ORD
SEA
6h 50m
Trip: 8 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Mediocre 2.0

Honestly the WORST experience ever with a flight. Angry Kayak doesn't post the cost of luggage and carry one with them. Flight delayed 5 hours for non existent weather, leading to 1 hour sitting on the tarmac because they didn't have a gate at the largest airport. Then, they destroyed brand new luggage.

I hated the whole thing. Seats and tray tables are a joke

SEA
ORD
Mediocre 3.6

Lights turned off at night, not a lot of announcements to disturb sleeping passengers. Plane was clean. Crew seemed fine enough.

To begin with, a three-hour delay on what was already just a four-hour flight, and no steps made to even offer snacks or discounts or other amenities to apologize for the gross delay. Very uncomfortable seats; even dead tired, I could not get much sleep. I usually use the food tray as a place to rest my head, but it was far too small to use for that. Upon landing, another 45 minutes of delay as we waited for our gate to become free, and again, no measures taken to apologize or make us as customers feel like they wanted us to feel even a little bit better about the situation. I get that it's a cheap flight option, but even so, the company needs to take more responsibility for its internal problems.

SEA
ORD
Okay 5.6

Crew was friendly.

No snacks, no coffee, no soda.

SEA
ORD
Okay 4.6

Boarding was a breeze. Crew was really nice and not uptight.

Seats are not comfortable. Sitting down in plywood would be more comfortable than these seats :(.

SEA
ORD
Mediocre 3.6

Tough! other than the only flight available for the time, I would not have chosen it.

Extremely commercial in the name of budget airlines! The flight wasn't cheap or anything! But money speaks everywhere and ALL the time with this airlines. $2 for a can of soda. Carry on bags- pay! For whatever reason you decide to buy it at the airport- extra! Seats- very uncomfortable and you couldn't get better even if you paid because the whole flight has the same kind! Use this airlines at your own discomfort!

Wed, Apr 11
SEA
ORD
6h 47m
Tue, Apr 17
ORD
SEA
6h 43m
Trip: 7 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Mediocre 3.6

Tough! other than the only flight available for the time, I would not have chosen it.

Extremely commercial in the name of budget airlines! The flight wasn't cheap or anything! But money speaks everywhere and ALL the time with this airlines. $2 for a can of soda. Carry on bags- pay! For whatever reason you decide to buy it at the airport- extra! Seats- very uncomfortable and you couldn't get better even if you paid because the whole flight has the same kind! Use this airlines at your own discomfort!

SEA
ORD
Mediocre 2.0

Literally nothing, other than it got me from A to B.

Rude and mean crew, uncomfortable seats, terrible boarding process and terrible amenities. I hated everything about this flight and Frontier airlines.

SEA
ORD
Mediocre 2.0

Honestly the WORST experience ever with a flight. Angry Kayak doesn't post the cost of luggage and carry one with them. Flight delayed 5 hours for non existent weather, leading to 1 hour sitting on the tarmac because they didn't have a gate at the largest airport. Then, they destroyed brand new luggage.

I hated the whole thing. Seats and tray tables are a joke

SEA
ORD
Good 6.3

The price of my ticket , the kindness of the crew .

The seats didn't recline , no outlets or WiFi. But it was ok

SEA
ORD
Okay 4.6

Boarding was a breeze. Crew was really nice and not uptight.

Seats are not comfortable. Sitting down in plywood would be more comfortable than these seats :(.

Wed, Apr 18
SEA
ORD
24h 08m
Tue, Apr 24
ORD
SEA
6h 43m
Trip: 7 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Mediocre 3.6

Tough! other than the only flight available for the time, I would not have chosen it.

Extremely commercial in the name of budget airlines! The flight wasn't cheap or anything! But money speaks everywhere and ALL the time with this airlines. $2 for a can of soda. Carry on bags- pay! For whatever reason you decide to buy it at the airport- extra! Seats- very uncomfortable and you couldn't get better even if you paid because the whole flight has the same kind! Use this airlines at your own discomfort!

SEA
ORD
Excellent 8.0

Simple and comfortable

SEA
ORD
Mediocre 2.6

Nothing

They usually have military board first. Frontier didn't. Didn't offer drinks. Uncomfortable seats. SUPER uncomfortable seats.

SEA
ORD
Mediocre 2.0

Honestly the WORST experience ever with a flight. Angry Kayak doesn't post the cost of luggage and carry one with them. Flight delayed 5 hours for non existent weather, leading to 1 hour sitting on the tarmac because they didn't have a gate at the largest airport. Then, they destroyed brand new luggage.

I hated the whole thing. Seats and tray tables are a joke

SEA
ORD
Okay 5.3

Quiet Fliight

Late getting into Seattle. Crew seemed in no rush to make up lost time.

Wed, May 9
SEA
ORD
12h 48m
Tue, May 15
ORD
SEA
6h 50m
Trip: 7 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Mediocre 3.6

Lights turned off at night, not a lot of announcements to disturb sleeping passengers. Plane was clean. Crew seemed fine enough.

To begin with, a three-hour delay on what was already just a four-hour flight, and no steps made to even offer snacks or discounts or other amenities to apologize for the gross delay. Very uncomfortable seats; even dead tired, I could not get much sleep. I usually use the food tray as a place to rest my head, but it was far too small to use for that. Upon landing, another 45 minutes of delay as we waited for our gate to become free, and again, no measures taken to apologize or make us as customers feel like they wanted us to feel even a little bit better about the situation. I get that it's a cheap flight option, but even so, the company needs to take more responsibility for its internal problems.

SEA
ORD
Mediocre 3.6

Tough! other than the only flight available for the time, I would not have chosen it.

Extremely commercial in the name of budget airlines! The flight wasn't cheap or anything! But money speaks everywhere and ALL the time with this airlines. $2 for a can of soda. Carry on bags- pay! For whatever reason you decide to buy it at the airport- extra! Seats- very uncomfortable and you couldn't get better even if you paid because the whole flight has the same kind! Use this airlines at your own discomfort!

SEA
ORD
Mediocre 3.6

Price

Two hour flight delay in the middle of the night due to "computers restarting."

SEA
ORD
Mediocre 2.0

Honestly the WORST experience ever with a flight. Angry Kayak doesn't post the cost of luggage and carry one with them. Flight delayed 5 hours for non existent weather, leading to 1 hour sitting on the tarmac because they didn't have a gate at the largest airport. Then, they destroyed brand new luggage.

I hated the whole thing. Seats and tray tables are a joke

SEA
ORD
Mediocre 2.6

Nothing

They usually have military board first. Frontier didn't. Didn't offer drinks. Uncomfortable seats. SUPER uncomfortable seats.

Wed, May 16
SEA
ORD
12h 48m
Tue, May 22
ORD
SEA
6h 50m
Trip: 7 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Okay 5.3

Quiet Fliight

Late getting into Seattle. Crew seemed in no rush to make up lost time.

SEA
ORD
Mediocre 2.0

Literally nothing, other than it got me from A to B.

Rude and mean crew, uncomfortable seats, terrible boarding process and terrible amenities. I hated everything about this flight and Frontier airlines.

SEA
ORD
Excellent 8.0

Simple and comfortable

SEA
ORD
Mediocre 2.0

Honestly the WORST experience ever with a flight. Angry Kayak doesn't post the cost of luggage and carry one with them. Flight delayed 5 hours for non existent weather, leading to 1 hour sitting on the tarmac because they didn't have a gate at the largest airport. Then, they destroyed brand new luggage.

I hated the whole thing. Seats and tray tables are a joke

SEA
ORD
Mediocre 3.6

Lights turned off at night, not a lot of announcements to disturb sleeping passengers. Plane was clean. Crew seemed fine enough.

To begin with, a three-hour delay on what was already just a four-hour flight, and no steps made to even offer snacks or discounts or other amenities to apologize for the gross delay. Very uncomfortable seats; even dead tired, I could not get much sleep. I usually use the food tray as a place to rest my head, but it was far too small to use for that. Upon landing, another 45 minutes of delay as we waited for our gate to become free, and again, no measures taken to apologize or make us as customers feel like they wanted us to feel even a little bit better about the situation. I get that it's a cheap flight option, but even so, the company needs to take more responsibility for its internal problems.

Mon, Jan 22
SEA
ORD
14h 36m
Tue, Jan 30
ORD
SEA
15h 41m
Trip: 9 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Okay 4.6

Boarding was a breeze. Crew was really nice and not uptight.

Seats are not comfortable. Sitting down in plywood would be more comfortable than these seats :(.

SEA
ORD
Mediocre 3.6

Tough! other than the only flight available for the time, I would not have chosen it.

Extremely commercial in the name of budget airlines! The flight wasn't cheap or anything! But money speaks everywhere and ALL the time with this airlines. $2 for a can of soda. Carry on bags- pay! For whatever reason you decide to buy it at the airport- extra! Seats- very uncomfortable and you couldn't get better even if you paid because the whole flight has the same kind! Use this airlines at your own discomfort!

SEA
ORD
Mediocre 2.0

Literally nothing, other than it got me from A to B.

Rude and mean crew, uncomfortable seats, terrible boarding process and terrible amenities. I hated everything about this flight and Frontier airlines.

SEA
ORD
Mediocre 3.6

Lights turned off at night, not a lot of announcements to disturb sleeping passengers. Plane was clean. Crew seemed fine enough.

To begin with, a three-hour delay on what was already just a four-hour flight, and no steps made to even offer snacks or discounts or other amenities to apologize for the gross delay. Very uncomfortable seats; even dead tired, I could not get much sleep. I usually use the food tray as a place to rest my head, but it was far too small to use for that. Upon landing, another 45 minutes of delay as we waited for our gate to become free, and again, no measures taken to apologize or make us as customers feel like they wanted us to feel even a little bit better about the situation. I get that it's a cheap flight option, but even so, the company needs to take more responsibility for its internal problems.

SEA
ORD
Mediocre 2.6

Well, this flight was a disaster. It already was a redeye as we were going to get into Chicago at 5:00am. But then our flight got delayed 3 hours in Seattle due to "technical difficulties" and we didn't touch down in Chicago until 7:45....then you know what happens? The flight doesn't have a gate because we were so late, and thus we had to wait in the plane for another 45 minutes. It was at this point frontier emailed me a voucher, which I was fine with....but then getting my luggage (which you have to pay extra for to be checked in) was shredded entirely on its side, as if they had dragged it on its side. Nice service.

Tue, Jan 23
SEA
ORD
16h 42m
Tue, Jan 30
ORD
SEA
22h 17m
Trip: 8 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Okay 5.6

Crew was friendly.

No snacks, no coffee, no soda.

SEA
ORD
Okay 4.6

Boarding was a breeze. Crew was really nice and not uptight.

Seats are not comfortable. Sitting down in plywood would be more comfortable than these seats :(.

SEA
ORD
Mediocre 2.0

Literally nothing, other than it got me from A to B.

Rude and mean crew, uncomfortable seats, terrible boarding process and terrible amenities. I hated everything about this flight and Frontier airlines.

SEA
ORD
Mediocre 2.0

Honestly the WORST experience ever with a flight. Angry Kayak doesn't post the cost of luggage and carry one with them. Flight delayed 5 hours for non existent weather, leading to 1 hour sitting on the tarmac because they didn't have a gate at the largest airport. Then, they destroyed brand new luggage.

I hated the whole thing. Seats and tray tables are a joke

SEA
ORD
Mediocre 2.6

Well, this flight was a disaster. It already was a redeye as we were going to get into Chicago at 5:00am. But then our flight got delayed 3 hours in Seattle due to "technical difficulties" and we didn't touch down in Chicago until 7:45....then you know what happens? The flight doesn't have a gate because we were so late, and thus we had to wait in the plane for another 45 minutes. It was at this point frontier emailed me a voucher, which I was fine with....but then getting my luggage (which you have to pay extra for to be checked in) was shredded entirely on its side, as if they had dragged it on its side. Nice service.

Mon, Jan 29
SEA
ORD
14h 36m
Tue, Jan 30
ORD
SEA
22h 17m
Trip: 2 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Okay 5.6

Crew was friendly.

No snacks, no coffee, no soda.

SEA
ORD
Mediocre 3.6

Tough! other than the only flight available for the time, I would not have chosen it.

Extremely commercial in the name of budget airlines! The flight wasn't cheap or anything! But money speaks everywhere and ALL the time with this airlines. $2 for a can of soda. Carry on bags- pay! For whatever reason you decide to buy it at the airport- extra! Seats- very uncomfortable and you couldn't get better even if you paid because the whole flight has the same kind! Use this airlines at your own discomfort!

SEA
ORD
Mediocre 3.6

Price

Two hour flight delay in the middle of the night due to "computers restarting."

SEA
ORD
Mediocre 2.0

Honestly the WORST experience ever with a flight. Angry Kayak doesn't post the cost of luggage and carry one with them. Flight delayed 5 hours for non existent weather, leading to 1 hour sitting on the tarmac because they didn't have a gate at the largest airport. Then, they destroyed brand new luggage.

I hated the whole thing. Seats and tray tables are a joke

SEA
ORD
Mediocre 2.6

Well, this flight was a disaster. It already was a redeye as we were going to get into Chicago at 5:00am. But then our flight got delayed 3 hours in Seattle due to "technical difficulties" and we didn't touch down in Chicago until 7:45....then you know what happens? The flight doesn't have a gate because we were so late, and thus we had to wait in the plane for another 45 minutes. It was at this point frontier emailed me a voucher, which I was fine with....but then getting my luggage (which you have to pay extra for to be checked in) was shredded entirely on its side, as if they had dragged it on its side. Nice service.

Tue, Jan 30
SEA
ORD
16h 42m
Tue, Feb 6
ORD
SEA
15h 41m
Trip: 8 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Good 6.3

The price of my ticket , the kindness of the crew .

The seats didn't recline , no outlets or WiFi. But it was ok

SEA
ORD
Excellent 8.0

Simple and comfortable

SEA
ORD
Mediocre 2.0

Literally nothing, other than it got me from A to B.

Rude and mean crew, uncomfortable seats, terrible boarding process and terrible amenities. I hated everything about this flight and Frontier airlines.

SEA
ORD
Mediocre 3.6

Price

Two hour flight delay in the middle of the night due to "computers restarting."

SEA
ORD
Mediocre 3.6

Tough! other than the only flight available for the time, I would not have chosen it.

Extremely commercial in the name of budget airlines! The flight wasn't cheap or anything! But money speaks everywhere and ALL the time with this airlines. $2 for a can of soda. Carry on bags- pay! For whatever reason you decide to buy it at the airport- extra! Seats- very uncomfortable and you couldn't get better even if you paid because the whole flight has the same kind! Use this airlines at your own discomfort!

Wed, Jan 31
SEA
ORD
14h 36m
Tue, Feb 6
ORD
SEA
15h 41m
Trip: 7 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Mediocre 3.6

Tough! other than the only flight available for the time, I would not have chosen it.

Extremely commercial in the name of budget airlines! The flight wasn't cheap or anything! But money speaks everywhere and ALL the time with this airlines. $2 for a can of soda. Carry on bags- pay! For whatever reason you decide to buy it at the airport- extra! Seats- very uncomfortable and you couldn't get better even if you paid because the whole flight has the same kind! Use this airlines at your own discomfort!

SEA
ORD
Mediocre 2.6

Well, this flight was a disaster. It already was a redeye as we were going to get into Chicago at 5:00am. But then our flight got delayed 3 hours in Seattle due to "technical difficulties" and we didn't touch down in Chicago until 7:45....then you know what happens? The flight doesn't have a gate because we were so late, and thus we had to wait in the plane for another 45 minutes. It was at this point frontier emailed me a voucher, which I was fine with....but then getting my luggage (which you have to pay extra for to be checked in) was shredded entirely on its side, as if they had dragged it on its side. Nice service.

SEA
ORD
Mediocre 3.6

Lights turned off at night, not a lot of announcements to disturb sleeping passengers. Plane was clean. Crew seemed fine enough.

To begin with, a three-hour delay on what was already just a four-hour flight, and no steps made to even offer snacks or discounts or other amenities to apologize for the gross delay. Very uncomfortable seats; even dead tired, I could not get much sleep. I usually use the food tray as a place to rest my head, but it was far too small to use for that. Upon landing, another 45 minutes of delay as we waited for our gate to become free, and again, no measures taken to apologize or make us as customers feel like they wanted us to feel even a little bit better about the situation. I get that it's a cheap flight option, but even so, the company needs to take more responsibility for its internal problems.

SEA
ORD
Good 6.3

The price of my ticket , the kindness of the crew .

The seats didn't recline , no outlets or WiFi. But it was ok

SEA
ORD
Mediocre 2.6

Nothing

They usually have military board first. Frontier didn't. Didn't offer drinks. Uncomfortable seats. SUPER uncomfortable seats.

Thu, Feb 1
SEA
ORD
16h 42m
Tue, Feb 6
ORD
SEA
15h 41m
Trip: 6 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Mediocre 2.0

Honestly the WORST experience ever with a flight. Angry Kayak doesn't post the cost of luggage and carry one with them. Flight delayed 5 hours for non existent weather, leading to 1 hour sitting on the tarmac because they didn't have a gate at the largest airport. Then, they destroyed brand new luggage.

I hated the whole thing. Seats and tray tables are a joke

SEA
ORD
Mediocre 3.6

Tough! other than the only flight available for the time, I would not have chosen it.

Extremely commercial in the name of budget airlines! The flight wasn't cheap or anything! But money speaks everywhere and ALL the time with this airlines. $2 for a can of soda. Carry on bags- pay! For whatever reason you decide to buy it at the airport- extra! Seats- very uncomfortable and you couldn't get better even if you paid because the whole flight has the same kind! Use this airlines at your own discomfort!

SEA
ORD
Okay 5.3

Quiet Fliight

Late getting into Seattle. Crew seemed in no rush to make up lost time.

SEA
ORD
Mediocre 3.6

Lights turned off at night, not a lot of announcements to disturb sleeping passengers. Plane was clean. Crew seemed fine enough.

To begin with, a three-hour delay on what was already just a four-hour flight, and no steps made to even offer snacks or discounts or other amenities to apologize for the gross delay. Very uncomfortable seats; even dead tired, I could not get much sleep. I usually use the food tray as a place to rest my head, but it was far too small to use for that. Upon landing, another 45 minutes of delay as we waited for our gate to become free, and again, no measures taken to apologize or make us as customers feel like they wanted us to feel even a little bit better about the situation. I get that it's a cheap flight option, but even so, the company needs to take more responsibility for its internal problems.

SEA
ORD
Mediocre 3.6

Price

Two hour flight delay in the middle of the night due to "computers restarting."

Mon, Feb 26
SEA
ORD
14h 36m
Tue, Mar 6
ORD
SEA
9h 44m
Trip: 9 days
4.6OkayShow reviews
Overall 4.6 Okay
Based on 67 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SEA
ORD
Mediocre 2.0

Honestly the WORST experience ever with a flight. Angry Kayak doesn't post the cost of luggage and carry one with them. Flight delayed 5 hours for non existent weather, leading to 1 hour sitting on the tarmac because they didn't have a gate at the largest airport. Then, they destroyed brand new luggage.

I hated the whole thing. Seats and tray tables are a joke

SEA
ORD
Mediocre 3.6

Tough! other than the only flight available for the time, I would not have chosen it.

Extremely commercial in the name of budget airlines! The flight wasn't cheap or anything! But money speaks everywhere and ALL the time with this airlines. $2 for a can of soda. Carry on bags- pay! For whatever reason you decide to buy it at the airport- extra! Seats- very uncomfortable and you couldn't get better even if you paid because the whole flight has the same kind! Use this airlines at your own discomfort!

SEA
ORD
Mediocre 3.6

Price

Two hour flight delay in the middle of the night due to "computers restarting."

SEA
ORD
Okay 5.3

Quiet Fliight

Late getting into Seattle. Crew seemed in no rush to make up lost time.

SEA
ORD
Okay 4.6

Boarding was a breeze. Crew was really nice and not uptight.

Seats are not comfortable. Sitting down in plywood would be more comfortable than these seats :(.

Show more results

Seattle/Tacoma Intl to Chicago Flight Information

Flights Arrive in Chicago
Flights Depart from Seattle/Tacoma Intl
Flight Price $145
Distance 1731 miles
Airlines Frontier
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an and someone from our team will get back to you promptly.

^
The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.