Find Cheap Flights to Seattle

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
The price shown for each flight will be the average for all passengers including any infants.
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Book cheap flights from Chicago O'Hare International to Seattle

(Round-trip)
Depart: Sat Aug 5 2017 Return: Wed Aug 9 2017 Trip spans 5 days
Frontier
Frontier
ORD
12:00a
SEA
7:21a
7h 21m
1 stop
SEA
12:00a
ORD
7:25a
7h 25m
1 stop
Depart: Wed Jul 26 2017 Return: Wed Aug 9 2017 Trip spans 15 days
Spirit Airlines
Spirit Airlines
ORD
12:00a
SEA
4:13p
16h 13m
1 stop
SEA
12:00a
ORD
3:29p
15h 29m
1 stop
Depart: Fri Jul 28 2017 Return: Sun Sep 17 2017 Trip spans 52 days
Multiple Airlines
Multiple Airlines
ORD
12:00a
SEA
8:07a
8h 07m
1 stop
SEA
12:00a
ORD
3:50a
3h 50m
nonstop
Depart: Thu Aug 3 2017 Return: Wed Aug 9 2017 Trip spans 7 days
United
United
ORD
12:00a
SEA
8:04a
8h 04m
1 stop
SEA
12:00a
ORD
3:57a
3h 57m
nonstop
Depart: Sun Aug 6 2017 Return: Wed Aug 16 2017 Trip spans 11 days
Alaska Airlines
Alaska Airlines
ORD
12:00a
SEA
4:26a
4h 26m
nonstop
SEA
12:00a
ORD
12:53p
12h 53m
1 stop
Depart: Mon Aug 7 2017 Return: Wed Aug 9 2017 Trip spans 3 days
Frontier
Frontier
ORD
12:00a
SEA
11:51a
11h 51m
1 stop
SEA
12:00a
ORD
7:25a
7h 25m
1 stop
Depart: Wed Jul 26 2017 Return: Thu Aug 3 2017 Trip spans 9 days
Multiple Airlines
Multiple Airlines
ORD
12:00a
SEA
4:13p
16h 13m
1 stop
SEA
12:00a
ORD
1:11p
13h 11m
1 stop
Depart: Sat Aug 5 2017 Return: Wed Aug 23 2017 Trip spans 19 days
Frontier
Frontier
ORD
12:00a
SEA
7:21a
7h 21m
1 stop
SEA
12:00a
ORD
8:53a
8h 53m
1 stop
Depart: Wed Jul 26 2017 Return: Mon Aug 7 2017 Trip spans 13 days
Spirit Airlines
Spirit Airlines
ORD
12:00a
SEA
4:13p
16h 13m
1 stop
SEA
12:00a
ORD
3:29p
15h 29m
1 stop
Depart: Sat Aug 5 2017 Return: Tue Aug 15 2017 Trip spans 11 days
United
United
ORD
12:00a
SEA
4:32a
4h 32m
nonstop
SEA
12:00a
ORD
9:27a
9h 27m
1 stop
Depart: Sat Jul 22 2017 Return: Wed Aug 9 2017 Trip spans 19 days
Multiple Airlines
Multiple Airlines
ORD
12:00a
SEA
7:16a
7h 16m
1 stop
SEA
12:00a
ORD
3:57a
3h 57m
nonstop
Depart: Sat Jul 22 2017 Return: Wed Aug 9 2017 Trip spans 19 days
Frontier
Frontier
ORD
12:00a
SEA
7:16p
19h 16m
1 stop
SEA
12:00a
ORD
7:25a
7h 25m
1 stop
Depart: Thu Aug 3 2017 Return: Tue Aug 15 2017 Trip spans 13 days
United
United
ORD
12:00a
SEA
8:55a
8h 55m
1 stop
SEA
12:00a
ORD
8:59a
8h 59m
1 stop
Depart: Sun Aug 6 2017 Return: Tue Aug 15 2017 Trip spans 10 days
Alaska Airlines
Alaska Airlines
ORD
12:00a
SEA
4:26a
4h 26m
nonstop
SEA
12:00a
ORD
11:40a
11h 40m
1 stop
Depart: Thu Jul 27 2017 Return: Thu Aug 3 2017 Trip spans 8 days
Multiple Airlines
Multiple Airlines
ORD
12:00a
SEA
8:07a
8h 07m
1 stop
SEA
12:00a
ORD
1:11p
13h 11m
1 stop
Depart: Tue Jul 25 2017 Return: Sat Jul 29 2017 Trip spans 5 days
Spirit Airlines
Spirit Airlines
ORD
12:00a
SEA
6:20p
18h 20m
1 stop
SEA
12:00a
ORD
3:29p
15h 29m
1 stop
Depart: Tue Jul 25 2017 Return: Thu Sep 7 2017 Trip spans 45 days
Frontier
Frontier
ORD
12:00a
SEA
8:55a
8h 55m
1 stop
SEA
12:00a
ORD
8:45a
8h 45m
1 stop
Depart: Sun Aug 6 2017 Return: Tue Aug 15 2017 Trip spans 10 days
United
United
ORD
12:00a
SEA
10:11a
10h 11m
1 stop
SEA
12:00a
ORD
9:27a
9h 27m
1 stop
Depart: Tue Jul 25 2017 Return: Wed Sep 6 2017 Trip spans 44 days
Multiple Airlines
Multiple Airlines
ORD
12:00a
SEA
8:55a
8h 55m
1 stop
SEA
12:00a
ORD
4:04a
4h 04m
nonstop
Depart: Wed Aug 2 2017 Return: Sat Aug 5 2017 Trip spans 4 days
Frontier
Frontier
ORD
12:00a
SEA
7:16a
7h 16m
1 stop
SEA
12:00a
ORD
7:25a
7h 25m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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.

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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,
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Airports
Origin

Chicago
$312
Destination

Seattle
$312
Airlines Airline reviews

338 travelers who booked a flight from Chicago to Seattle rated their chosen airlines with an average of 7.0.

Overall
7.2
Boarding
7.3
Crew
7.8
Comfort
6.9
Food
6.2
Entertainment
6.1