Find Deals on Flights from Lambert-St Louis 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
Students
under 26
The price shown for each flight will be the average for all passengers including any infants.
Compare vs. KAYAK all | none
Browse Origins:
Browse Destinations:

Dates flexible? Here are the best fares found in the past 48 hours...

Book cheap flights from Lambert-St Louis to Seattle

(Round-trip)
Depart: Wed Feb 1 2017 Return: Wed Feb 8 2017 Trip spans 8 days
Alaska Airlines
Alaska Airlines
STL
1:50p
SEA
6:20p
4h 30m
nonstop
SEA
1:15p
STL
4:53p
3h 38m
nonstop
Depart: Thu Jan 12 2017 Return: Sat Jan 21 2017 Trip spans 10 days
Major Airline
Major Airline
STL
5:50a
SEA
12:20a
18h 30m
1 stop
SEA
12:10a
STL
10:51a
10h 41m
1 stop
Depart: Sat Jan 14 2017 Return: Sat Jan 21 2017 Trip spans 8 days
Frontier
Frontier
STL
10:50a
SEA
6:25a
19h 35m
1 stop
SEA
5:10a
STL
3:51p
10h 41m
1 stop
Depart: Wed Feb 22 2017 Return: Fri Feb 24 2017 Trip spans 3 days
United
United
STL
12:45a
SEA
6:59a
6h 14m
1 stop
SEA
8:40a
STL
3:24p
6h 44m
1 stop
Depart: Tue Jan 17 2017 Return: Fri Jan 20 2017 Trip spans 4 days
American Airlines
American Airlines
STL
11:25a
SEA
7:59p
8h 34m
1 stop
SEA
10:00a
STL
4:51p
6h 51m
1 stop
Depart: Mon Jan 9 2017 Return: Fri Jan 13 2017 Trip spans 5 days
Delta
Delta
STL
1:50p
SEA
8:26p
6h 36m
1 stop
SEA
1:45a
STL
9:50a
8h 05m
1 stop
Depart: Fri Mar 3 2017 Return: Mon Mar 6 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
STL
1:30a
SEA
6:05a
4h 35m
nonstop
SEA
1:15p
STL
4:53p
3h 38m
nonstop
Depart: Sun Jan 15 2017 Return: Sat Jan 21 2017 Trip spans 7 days
Frontier
Frontier
STL
10:50a
SEA
5:20a
18h 30m
1 stop
SEA
5:10a
STL
3:51p
10h 41m
1 stop
Depart: Sun Feb 19 2017 Return: Sat Feb 25 2017 Trip spans 7 days
Major Airline
Major Airline
STL
5:50a
SEA
12:10a
18h 20m
1 stop
SEA
12:10a
STL
10:56a
10h 46m
1 stop
Depart: Tue Jan 24 2017 Return: Fri Jan 27 2017 Trip spans 4 days
Frontier
Frontier
STL
10:50a
SEA
5:20a
18h 30m
1 stop
SEA
5:30a
STL
3:51p
10h 21m
1 stop
Depart: Thu Jan 26 2017 Return: Sun Jan 29 2017 Trip spans 4 days
American Airlines
American Airlines
STL
12:26p
SEA
9:48p
9h 22m
1 stop
SEA
10:00a
STL
4:51p
6h 51m
1 stop
Depart: Sat Jan 7 2017 Return: Wed Jan 11 2017 Trip spans 5 days
Alaska Airlines
Alaska Airlines
STL
1:50p
SEA
6:24p
4h 34m
nonstop
SEA
1:15p
STL
4:56p
3h 41m
nonstop
Depart: Wed Jan 11 2017 Return: Fri Jan 13 2017 Trip spans 3 days
Delta
Delta
STL
1:50p
SEA
8:26p
6h 36m
1 stop
SEA
11:32a
STL
5:19p
5h 47m
1 stop
Depart: Thu Jan 19 2017 Return: Mon Jan 23 2017 Trip spans 5 days
Major Airline
Major Airline
STL
9:50p
SEA
7:55a
10h 05m
1 stop
SEA
2:40a
STL
9:07a
6h 27m
1 stop
Depart: Sun Dec 11 2016 Return: Wed Dec 14 2016 Trip spans 4 days
United
United
STL
12:50a
SEA
7:06a
6h 16m
1 stop
SEA
8:50a
STL
4:48p
7h 58m
1 stop
Depart: Fri Jan 27 2017 Return: Sun Jan 29 2017 Trip spans 3 days
American Airlines
American Airlines
STL
7:45a
SEA
4:45p
9h 00m
1 stop
SEA
10:00a
STL
4:51p
6h 51m
1 stop
Depart: Tue Jan 10 2017 Return: Thu Jan 19 2017 Trip spans 10 days
Frontier
Frontier
STL
10:50a
SEA
5:20a
18h 30m
1 stop
SEA
5:10a
STL
3:51p
10h 41m
1 stop
Depart: Sat Feb 18 2017 Return: Thu Feb 23 2017 Trip spans 6 days
Delta
Delta
STL
11:22a
SEA
6:51p
7h 29m
1 stop
SEA
4:55a
STL
10:39a
5h 44m
1 stop
Depart: Mon Dec 19 2016 Return: Wed Jan 11 2017 Trip spans 24 days
United
United
STL
1:50p
SEA
10:03p
8h 13m
1 stop
SEA
1:30a
STL
8:27a
6h 57m
1 stop
Depart: Sat Jan 28 2017 Return: Sat Feb 4 2017 Trip spans 8 days
American Airlines
American Airlines
STL
6:36a
SEA
2:20p
7h 44m
1 stop
SEA
10:00a
STL
4:51p
6h 51m
1 stop
* 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 email and someone from our team will get back to you promptly.

Airports
Origin

St. Louis
$197
Destination

Seattle
$197
Airlines Airline reviews

24 travelers who booked a flight from St. Louis to Seattle rated their chosen airlines with an average of 8.9.

Overall
9.3
Boarding
8.9
Crew
9.3
Comfort
8.8
Food
8.7
Entertainment
8.8