Cheap Flights From Seattle - Tacoma Intl. (SEA) To Lambert-St. Louis Intl. (STL)

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Cheapest Flights from Seattle (SEA) to St. Louis (STL)

The cheapest flights to Lambert-St. Louis Intl. found within the past 7 days were CA $363 round trip and CA $362 one way. Prices and availability subject to change. Additional terms may apply.

Tue, Feb 17 - Sun, Feb 22
SEA
Seattle
STL
St. Louis
CA $363 Roundtrip, found 5 days ago
CA $363
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue, Feb 17 from Seattle to St. Louis, returning Sun, Feb 22, priced at CA $363 found 5 days ago
Thu, Jan 15 - Sun, Jan 18
SEA
Seattle
STL
St. Louis
CA $412 Roundtrip, found 1 day ago
CA $412
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Jan 15 from Seattle to St. Louis, returning Sun, Jan 18, priced at CA $412 found 1 day ago
Sun, Oct 26 - Tue, Oct 28
SEA
Seattle
STL
St. Louis
CA $474 Roundtrip, found 3 days ago
CA $474
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sun, Oct 26 from Seattle to St. Louis, returning Tue, Oct 28, priced at CA $474 found 3 days ago
Tue, Feb 17 - Sun, Feb 22
SEA
Seattle
STL
St. Louis
CA $509 Roundtrip, found 5 days ago
CA $509
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue, Feb 17 from Seattle to St. Louis, returning Sun, Feb 22, priced at CA $509 found 5 days ago
Thu, Jan 15 - Sun, Jan 18
SEA
Seattle
STL
St. Louis
CA $573 Roundtrip, found 1 day ago
CA $573
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Jan 15 from Seattle to St. Louis, returning Sun, Jan 18, priced at CA $573 found 1 day ago
Sun, Oct 26 - Tue, Oct 28
SEA
Seattle
STL
St. Louis
CA $598 Roundtrip, found 3 days ago
CA $598
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sun, Oct 26 from Seattle to St. Louis, returning Tue, Oct 28, priced at CA $598 found 3 days ago
Tue, Feb 17 - Sun, Feb 22
SEA
Seattle
STL
St. Louis
CA $604 Roundtrip, found 5 days ago
CA $604
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue, Feb 17 from Seattle to St. Louis, returning Sun, Feb 22, priced at CA $604 found 5 days ago
Sun, Oct 26 - Tue, Oct 28
SEA
Seattle
STL
St. Louis
CA $611 Roundtrip, found 3 days ago
CA $611
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sun, Oct 26 from Seattle to St. Louis, returning Tue, Oct 28, priced at CA $611 found 3 days ago
Thu, Jan 15 - Sun, Jan 18
SEA
Seattle
STL
St. Louis
CA $615 Roundtrip, found 1 day ago
CA $615
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Jan 15 from Seattle to St. Louis, returning Sun, Jan 18, priced at CA $615 found 1 day ago
Thu, Jan 15 - Sun, Jan 18
SEA
Seattle
STL
St. Louis
CA $623 Roundtrip, found 1 day ago
CA $623
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Jan 15 from Seattle to St. Louis, returning Sun, Jan 18, priced at CA $623 found 1 day ago
Sun, Oct 26 - Tue, Oct 28
SEA
Seattle
STL
St. Louis
CA $631 Roundtrip, found 3 days ago
CA $631
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sun, Oct 26 from Seattle to St. Louis, returning Tue, Oct 28, priced at CA $631 found 3 days ago
Sun, Oct 26 - Tue, Oct 28
SEA
Seattle
STL
St. Louis
CA $641 Roundtrip, found 3 days ago
CA $641
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sun, Oct 26 from Seattle to St. Louis, returning Tue, Oct 28, priced at CA $641 found 3 days ago
Sun, Oct 26 - Tue, Oct 28
SEA
Seattle
STL
St. Louis
CA $661 Roundtrip, found 3 days ago
CA $661
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sun, Oct 26 from Seattle to St. Louis, returning Tue, Oct 28, priced at CA $661 found 3 days ago
Thu, Jan 15 - Sun, Jan 18
SEA
Seattle
STL
St. Louis
CA $664 Roundtrip, found 1 day ago
CA $664
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Jan 15 from Seattle to St. Louis, returning Sun, Jan 18, priced at CA $664 found 1 day ago
Thu, Jan 15 - Sun, Jan 18
SEA
Seattle
STL
St. Louis
CA $690 Roundtrip, found 1 day ago
CA $690
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Jan 15 from Seattle to St. Louis, returning Sun, Jan 18, priced at CA $690 found 1 day ago
Sun, Oct 26 - Tue, Oct 28
SEA
Seattle
STL
St. Louis
CA $691 Roundtrip, found 3 days ago
CA $691
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sun, Oct 26 from Seattle to St. Louis, returning Tue, Oct 28, priced at CA $691 found 3 days ago
Thu, Jan 15 - Sun, Jan 18
SEA
Seattle
STL
St. Louis
CA $698 Roundtrip, found 1 day ago
CA $698
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Jan 15 from Seattle to St. Louis, returning Sun, Jan 18, priced at CA $698 found 1 day ago
Sun, Oct 26 - Tue, Oct 28
SEA
Seattle
STL
St. Louis
CA $714 Roundtrip, found 3 days ago
CA $714
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sun, Oct 26 from Seattle to St. Louis, returning Tue, Oct 28, priced at CA $714 found 3 days ago

Frequently asked questions

Are there direct flights from Seattle - Tacoma Intl. Airport (SEA) to St. Louis Lambert International Airport?
If you're hoping to get from SEA to St. Louis Lambert International Airport in the shortest possible time, you'll be glad to know multiple airlines operate nonstop flights. Select your favorite seat with Southwest Airlines or Alaska Airlines.
What airlines fly from Seattle - Tacoma Intl. Airport (SEA) to Lambert-St. Louis Intl. Airport (STL)?
There are several airlines that offer direct flights from Seattle - Tacoma Intl. Airport (SEA) to Lambert-St. Louis Intl. Airport (STL). Southwest Airlines (WN) is among the best of them, and operates around 30 flights each month. You should also browse the deals on offer from Alaska Airlines (AS). Another popular airline, it operates 30 flights every month on the Seattle to St. Louis route. Be sure to compare the two to find your perfect fare.
What is the best day to buy a plane ticket?
Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you're looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you're browsing flight deals.
What are the cheapest days to fly?
Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.
How far in advance can you book a flight?
Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.

Popular Flight Routes from Seattle (SEA)

Travelers at SEA love to visit these top cities. Roam to the top destinations from Seattle (SEA) today with the cheap prices from Travelocity!

Popular Flight Routes from St. Louis (STL)

Travelers at STL love to visit these top cities. Roam to the top destinations from St. Louis(STL) today with the cheap prices from Travelocity!

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.