CHI - SEA

$118 Find Cheap Flights from Chicago to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Chicago to Seattle departing on 5/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to Seattle.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to Seattle.
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Everything you should know

Cheapest round-trip
$226
Typical prices: $356-$214
Frontier
vie. 5/1mar. 5/5
ORD - SEA • 2 stops
Cheapest non-stop
$233
Typical prices: $498-$295
Southwest
sáb. 5/2sáb. 5/9
MDW - SEA • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts and KAYAK users. AI can make mistakes.
Delta offers free Wi-Fi for SkyMiles members.
Bring your own food as in-flight service varies.
Expert advice
Expert advice
+1
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Expert advice
Expert advice
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Top airlines
Cheapest • from $226 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Nonstop flights
Every day
You can fly direct with Alaska Airlines, American Airlines and others. Average duration is 4h 38m
Direct flights
Direct flights
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Direct flights
Direct flights
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Top routes
Cheapest • 2% average savings
Most popular
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $193 (round-trip)
Shortest trip • 6h 41m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 49% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 24% price drop
Most popular
Good to know
Good to know
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Start a new search
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We hope you love your trip to Seattle!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Chicago to Seattle (CHI-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Chicago to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Chicago to Seattle

vie., may. 1 - mar., may. 5
Frontier Logo
5:50 am - 9:27 am
ORD
-
SEA
29h 37m
2 stops
Frontier Logo
11:06 am - 6:39 am
SEA
-
ORD
17h 33m
1 stop
$226Frontier
jue., abr. 30 - mar., may. 5
Multiple Airlines Logo
11:28 am - 3:05 pm
ORD
-
SEA
29h 37m
2 stops
Multiple Airlines Logo
11:06 am - 6:39 am
SEA
-
ORD
17h 33m
1 stop
$228Multiple Airlines
sáb., may. 2 - sáb., may. 2
Southwest Logo
10:00 am - 5:55 pm
MDW
-
SEA
9h 55m
1 stop
Southwest Logo
6:55 pm - 5:40 am
SEA
-
MDW
8h 45m
1 stop
$230Southwest
sáb., jun. 6 - sáb., jun. 13
Frontier Logo
9:04 pm - 6:35 pm
ORD
-
SEA
23h 31m
1 stop
Frontier Logo
8:12 pm - 5:32 am
SEA
-
ORD
7h 20m
1 stop
$230Frontier
mié., may. 13 - vie., may. 22
Frontier Logo
9:37 pm - 9:49 am
ORD
-
SEA
14h 12m
1 stop
Frontier Logo
7:50 pm - 8:32 pm
SEA
-
ORD
22h 42m
1 stop
$231Frontier
sáb., may. 9 - sáb., may. 16
Frontier Logo
9:37 pm - 9:49 am
ORD
-
SEA
14h 12m
1 stop
Frontier Logo
11:06 am - 6:39 am
SEA
-
ORD
17h 33m
1 stop
$232Frontier
sáb., may. 2 - sáb., may. 9
Southwest Logo
6:05 pm - 8:35 pm
MDW
-
SEA
4h 30mnonstop
Southwest Logo
11:55 pm - 5:55 am
SEA
-
MDW
4h 00mnonstop
$233Southwest
mié., may. 13 - dom., may. 24
Multiple Airlines Logo
9:37 pm - 9:49 am
ORD
-
SEA
14h 12m
1 stop
Multiple Airlines Logo
11:21 am - 5:59 am
SEA
-
ORD
16h 38m
1 stop
$239Multiple Airlines
sáb., may. 2 - sáb., may. 9
Southwest Logo
6:05 pm - 8:35 pm
MDW
-
SEA
4h 30mnonstop
Southwest Logo
5:45 pm - 6:00 am
SEA
-
MDW
10h 15m
1 stop
$243Southwest
sáb., may. 2 - sáb., may. 9
Southwest Logo
6:05 pm - 8:35 pm
MDW
-
SEA
4h 30mnonstop
Southwest Logo
5:45 am - 5:15 pm
SEA
-
MDW
9h 30m
2 stops
$248Southwest
Booking Insights

KAYAK's insights & trends for Chicago to Seattle flights

Get data-powered insights and trends into flights from Chicago to Seattle to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Chicago to Seattle?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Chicago to Seattle departing in May.

What is the cheapest Chicago to Seattle flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from Chicago to Seattle costs $225 on the route between Chicago Midway Airport (MDW) and Seattle (SEA). Over the past month, this route was, on average, 2% cheaper than other Chicago-Seattle routes. The most popular route is between Chicago O'Hare Intl Airport (ORD) and Seattle (SEA).

What’s the cheapest day of the week to fly from Chicago to Seattle?

The average price of all round-trip flights from Chicago to Seattle clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Seattle on a Wednesday and more expensive on a Monday. On your return trip to Chicago, you should consider flying back on a Wednesday, and avoid Mondays for better deals.

What is the cheapest month to fly from Chicago to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Chicago to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Chicago to Seattle is January, where tickets cost $209 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $333 and $310 respectively.

Can I save money by flying with a layover from Chicago to Seattle?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $378, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from Chicago to Seattle?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Chicago to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Chicago to Seattle, you should book around 3 weeks before departure, which saves you about 49% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Expert advice

Expert advice for your flight from Chicago to Seattle

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on Alaska Airlines and SEA

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Stefanie Waldek

Stefanie Waldek

Expert on Delta, United Airlines and ORD

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Good to know

Low seasonJanuary
Cheapest flight$118
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly with an average 12% increase in price.
Flight from Chicago Midway Airport to Seattle

When to book flights from Chicago to Seattle

Are your dates flexible? Find out the best times to travel from Chicago to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Flights from Chicago to Seattle: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew the route from Chicago to Seattle 
PaulFlew with Alaska Airlines
ORD
-
SEA
Apr 2024
The flight is long, at over four hours. I would try to get a window or aisle seat to be more comfortable. I would check with other airlines that allow you to choose your seat even if you are in the economy section. I would bring your own food on the plane as the service was sometimes sketchy.
Verified travelerFlew with Alaska Airlines
ORD
-
SEA
Apr 2024
If you miss your flight ask any alaska agent to how and where to rebook the flight.

FAQs for booking flights from Chicago to Seattle

  • What is the cheapest flight from Chicago to Seattle?

    In the last 3 days, the lowest price for a flight from Chicago to Seattle was $118 for a one-way ticket and $226 for a round-trip.

  • Do I need a passport to fly between Chicago and Seattle?

    No, a passport isn't needed to fly from Chicago to Seattle. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Chicago to Seattle?

    There are 2 airports in Chicago (Chicago Midway and Chicago O'Hare Intl.) and only 1 airport in Seattle (Seattle/Tacoma Intl). The cheapest flights are generally found on the Chicago Midway Airport to Seattle/Tacoma Intl flight route.

  • Which airlines offer Wi-Fi service onboard planes from Chicago to Seattle?

    All the following airlines offer inflight Wi-Fi service on the Chicago to Seattle flight route: American Airlines, Delta, Alaska Airlines, Air Canada, United Airlines, and JetBlue.

  • Which aircraft models fly most regularly from Chicago to Seattle?

    The Boeing 737-800 is the aircraft model that flies most regularly on the Chicago to Seattle flight route.

  • Which airline alliances offer flights from Chicago to Seattle?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Chicago and Seattle, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from Chicago to Seattle?

    There are nonstop flights from Chicago to Seattle on a daily basis.

  • Which is the best airline for flights from Chicago to Seattle, Southwest or Alaska Airlines?

    The two airlines most popular with KAYAK users for flights from Chicago to Seattle are Southwest and Alaska Airlines. With an average price for the route of $247 and an overall rating of 8.0, Southwest is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $289 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Chicago to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Chicago to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Chicago to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Chicago is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Chicago to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Chicago with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Chicago to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Chicago up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Chicago to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for $221 or less one-way and $316 or less round-trip.

Prefer to fly direct from Chicago to Seattle?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Chicago to Seattle/Tacoma Intl.
Find which airlines fly direct from Chicago to Seattle/Tacoma Intl Airport, which days they fly and book direct flights.

Direct departures

Chicago to Seattle/Tacoma Intl

Monday

Alaska Airlines,American Airlines,Delta, +2 more

Alaska Airlines,American Airlines, +3 more

Tuesday

Alaska Airlines,American Airlines,Delta, +2 more

Alaska Airlines,American Airlines, +3 more

Wednesday

Alaska Airlines,American Airlines,Delta, +2 more

Alaska Airlines,American Airlines, +3 more

Thursday

Alaska Airlines,American Airlines,Delta, +2 more

Alaska Airlines,American Airlines, +3 more

Friday

Alaska Airlines,American Airlines,Delta, +2 more

Alaska Airlines,American Airlines, +3 more

Saturday

Alaska Airlines,American Airlines,Delta, +2 more

Alaska Airlines,American Airlines, +3 more

Sunday

Alaska Airlines,American Airlines,Delta, +2 more

Alaska Airlines,American Airlines, +3 more

See more direct flights

Direct returns

Seattle/Tacoma Intl to Chicago

Monday

Alaska Airlines,American Airlines,Delta, +2 more

Alaska Airlines,American Airlines, +3 more

Tuesday

Alaska Airlines,American Airlines,Delta, +2 more

Alaska Airlines,American Airlines, +3 more

Wednesday

Alaska Airlines,American Airlines,Delta, +2 more

Alaska Airlines,American Airlines, +3 more

Thursday

Alaska Airlines,American Airlines,Delta, +2 more

Alaska Airlines,American Airlines, +3 more

Friday

Alaska Airlines,American Airlines,Delta, +2 more

Alaska Airlines,American Airlines, +3 more

Saturday

Alaska Airlines,American Airlines,Delta, +2 more

Alaska Airlines,American Airlines, +3 more

Sunday

Alaska Airlines,American Airlines,Delta, +2 more

Alaska Airlines,American Airlines, +3 more

See more direct flights

Reviews of the top 5 airlines serving from Chicago to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Chicago to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Chicago to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
Alaska AirlinesOverall score based on 12234 reviews
7.8Comfort
7.0Entertainment
7.0Food
8.5Crew
8.1Boarding
Airline reviews

My very first, first class flight! Loved the comfortable seats, foot rest and beverages. Did not have food due to short flight. Crew was very friendly!

10.0 ExcellentKellye, Apr 2026
EUG - SEA
Read more Alaska Airlines reviews

My very first, first class flight! Loved the comfortable seats, foot rest and beverages. Did not have food due to short flight. Crew was very friendly!

This was my first time flying first class. I was really disappointed with the food option and lack of entertainment. I wasn’t given an option of what to eat. The breakfast was less than desirable. It was a bowl of some type of granola cereal, dried fruit, almond butter and 3 biscuits that we pretty much tasteless. There was so much fiber in that meal I was afraid I would poop myself in the flight. There was absolutely ZERO entertainment available. No tv screen to watch a movie or listen to music. No charging port for my phone. I recently flew Delta Airlines Comfort class and I had a tv screen with numerous options of music to listen to and movies to watch. Also I had a charging port for my phone. I expected more quality from first class. Please understand I am not some prima donna that feels entitled. But the price I paid for first class wasn’t worth what I experienced.

I've been loyal to Alaska Airlines for nearly 25 years and before the merger I had much better benefits. However, since the merger with Hawaiian Air, you've bumped me from group A to B or C and I now get poor selection of seats in the back of the plane.

This flight was all good. It was packed, but it took off on time and there were no problems. It would have been nice if they'd checked our bags for free, as they sometimes do.

Exactly as anticipated. I've always preferred Alaska Airlines over all others.

Were on time, very efficient and pleasant. Families with children were treated well and boarded ahead which made it easier for the rest of the plane.

I truly can’t give a review regarding the food or entertainment it did not apply to my flight. But everything ran very smoothly.

Great. A to B no issues. Everyone did their jobs exceptionally. All great. God bless America.

The response was very helpful and quick. Overall, it was very professional.

No complimentary snacks or food. Had to buy drinks and food.

The tray table was broken and the food was terrible.

The gentleman at the gate I think his name is RIE was exceptional

While they turned off most cabin lights to allow people to sleep, I was bothered by how bright the side lights still were. It was still quite bright for me in a window seat, when I wish I could have slept!

One of the flight attendants was a little cranky. I appreciated the free wifi and plug to charge my laptop

Okay considering we had weather delays which the Pilot notified us of immediately!

The boarding was organized and informative but the plane was tight meaning that you were sitting on one another and extremely uncomfortable. It’s disappointing that can’t have common seating comfort on the plane.

Everything could have benn better. Short fly, no food, no entertainment and no wifi.

It was fine. 55 minute flight. No snacks or beverage service offered. Boarding went smoothly and my walker was waiting for me on the jet way.

My flight was cencaled due with the bad weather on Sunday the crew was poorly mistaken my luggage supposed depart with my flight instead I didn’t have my luggage for almost 3 days the website is poorly respond to my complain until I have someone to do it my connection smooth their not even respon or email me even the have my luggage

8 hours late and the plane smelled like urine, that smell in the morning when your child wet the bed in the night.

The Honolulu Hub needs 2 to 3 times the amount of things to do as well as shuttles that transport to/from gates and terminals. Arriving from OCONUS locations; transferring to CONUS locations its a miserable experience. Fetching and re-checking bags, then returning to a gate across the airport take longer than any other large airport. If youre confused by what I mean, the process goes like this: Disembark plane Walk a mile to the main terminal Walk half a mile to baggage claim Wait 40 minutes for baggage Walk a mile to re-check-in baggage Wait 20 minutes for checking in those bags Fo back through the wrong TSA line because the signage is poor Almost miss the connecting flight because your gate is across the airport.

The checking was disaster, the crew wasn't behave well. It took us two hours to check in, after that thr line at the TSA was long, we barely make the flight. Bad airline

Fabulous if you have a portable wheelchair. They can store it in the galley and you can just walk out with it. Really nice and the flat seats are just incredible, very nice. iPads for movies, also pretty nice,

The crew were exceptionally nice and accommodating. My wife was tired after the flight from Haneda, Tokyo. They let her sleep and served her dinner later after she woke up, before we landed in PDX.

No charging outlets worked. Other than collecting trash attendants didn’t come around. No one could hear flight attendants announcements during the flight. Seat pads were horrible. Sitting on a board for 5 hours. What happened to Hawaiian airlines comfort, hospitality, and extras? Our pilots did an excellent job trying to minimize turbulence and incredible job in landing in windy conditions.

I like that if they asked you to checked in a bag at the gate they give you priority to board

Horrible food and crew. Crew were laughing and talking loud while people were trying to sleep

Yall need to integrate your system with Alaska more efficiently. They booted me off the first flight because of a discrepancy on your end.

The crew at Hawaiian Airlines was fantastic. Kind and hard working. The pilots were great with giving us all the updates to make sure we were informed.

Very good. Nice plane and we sat in economy plus - bigger seats, more room. They served a meal and snacks, and the meal was an apple stuffed pancake that was very good! The snack for us was a hummus sandwich - also very good. The flight attendants were helpful and nice. They have plenty of movies and shows to watch. My only negative -- they changed our flights around and did not adjust the layovers, so we ended up with a very long and unnecessary layover in Honolulu.

Poor communication, flight was delayed for preventable reasons. I missed my connection.

No meal service to the back of the plane as it started late or was too slow to get it out before it was time to land.

Terrible, if possible won't be flying again anytime soon!

Efficient boarding and early departure. Very smooth flight. Early arrival in ATL. Great flight.

Smooth and easy boarding, comfortable for the entire 5 hour flight, and the seat back entertainment was great! I appreciated all the features, from location info and maps, movies, the ability to connect with Bluetooth headphones, and good selection of movies. Food was good, normal airline snacks (I didn’t purchase anything)

Awful. No counter attendants. No dinner offered due to delays.

This trip did not start off well. The inbound flight was delayed about 20 minutes. Then, after initial onboarding, the passengers had to deplane due to a mechanical problem. That took about 30 minutes to fix and be cleared. Then, reboarding was chaotic. It took a long time to sort passengers and two passengers on standby were ticketed but there was no seat. So, they had to deplane. One of the flight crew was trying to help passengers figure out a place to put their carry-on bags and that took more time. In the end, our scheduled 10:30 am departure did not actually take off until about 12:05 pm CST. The flight itself was long but we got to Houston. Some passengers missed their connecting flights and had to rebook. Not the best of flights I've had.

We were delayed for about an hour from taking off due to traffic control procedures at the destination airport. But once in the air, the flight went well. The crew members were great and provided cabin service despite moderate turbulence during much of the flight.

Short flight, but no drink/snack service. The flights both going and coming were delayed.

Not being stranded in Chicago for her airport to 11:30 tomorrow morning the 3rd

Delays experienced in boarding/take off due to incoming plane delayed. However, the boarding time/depart time in the app was significantly delayed in providing these updates. Usually not updated until an hour after we should have already boarded. Poorly managed.

Moved to earlier flight which unexpectedly had maintenance issues initially indicated as quick fix to ultimately plane changes. Moved back to original flight, also delayed. In all cases customer updates and communication very unclear, no updates on drivers for delays.

Plane was super cold. No entertainment unless you were with mileage program Getting off the plane was super slow

Typical AA - late by 90+ mn. Gate changed twice... Changed the departure time 6 times No explanation, no communication on reasons for delay I travel with AA twice a year... and it is consistently very poor.. I will continue to use AA only when i have to.

The gate got changed several times and the flight was delayed over an hour. Awful experience

American continues to decline in their customer service and its beyond disappointing.

It was an older plane. First Class was not especially roomy or comfortable. It was a short flight so there were no meal but they did offer mixed nuts which used to be normal but now is rare. Crew member was very polite and professional.

Flight to Tampa was delayed taking off due to plane arriving late but no other issues

As previously stated the delay I experienced flying from Wichita to Chicago caused a host of issues. When I finally was able to be booked on the last remaining American flight from Chicago to Cincinnati, the gate changed four times with the last change occurring very near the scheduled boarding time. While I didn't have a problem moving from gate to gate, I did notice and make note of others that had mobility issues and had to move each time for the gate change.

Maintenance took a very long time and then we were in a holding pattern. While a one-off maintenance issue is standard, there were delays on both of my flights for this trip based on maintenance issues with the planes, which delayed both flights over 45 minutes. Thankfully, I didn't have any connections but it wasn't an experience that would make me pick AA if I have other options.

Everything you need to know for your flight from Chicago to Seattle

Information on your arrival and departure airports

Compare transportation modes for Chicago to Seattle

Transportation modeAverage priceAverage duration
Flights$7154h 30m
Trains$57446h 24m