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 $332 round trip and CA $184 one way. Prices and availability subject to change. Additional terms may apply.

Sat, Oct 11 - Sat, Oct 18
SEA
Seattle
STL
St. Louis
CA $332 Roundtrip, found 2 days ago
CA $332
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat, Oct 11 from Seattle to St. Louis, returning Sat, Oct 18, priced at CA $332 found 2 days ago
Fri, Dec 5 - Mon, Dec 8
SEA
Seattle
STL
St. Louis
CA $354 Roundtrip, found 2 days ago
CA $354
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Fri, Dec 5 from Seattle to St. Louis, returning Mon, Dec 8, priced at CA $354 found 2 days ago
Thu, Oct 30 - Sun, Nov 2
SEA
Seattle
STL
St. Louis
CA $361 Roundtrip, found 4 days ago
CA $361
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Oct 30 from Seattle to St. Louis, returning Sun, Nov 2, priced at CA $361 found 4 days ago
Thu, Mar 5 - Sun, Mar 8
SEA
Seattle
STL
St. Louis
CA $373 Roundtrip, found 5 days ago
CA $373
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu, Mar 5 from Seattle to St. Louis, returning Sun, Mar 8, priced at CA $373 found 5 days ago
Thu, Oct 30 - Sun, Nov 2
SEA
Seattle
STL
St. Louis
CA $417 Roundtrip, found 4 days ago
CA $417
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Oct 30 from Seattle to St. Louis, returning Sun, Nov 2, priced at CA $417 found 4 days ago
Sat, Oct 11 - Sat, Oct 18
SEA
Seattle
STL
St. Louis
CA $473 Roundtrip, found 2 days ago
CA $473
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat, Oct 11 from Seattle to St. Louis, returning Sat, Oct 18, priced at CA $473 found 2 days ago
Thu, Oct 30 - Sun, Nov 2
SEA
Seattle
STL
St. Louis
CA $488 Roundtrip, found 4 days ago
CA $488
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Oct 30 from Seattle to St. Louis, returning Sun, Nov 2, priced at CA $488 found 4 days ago
Fri, Dec 5 - Mon, Dec 8
SEA
Seattle
STL
St. Louis
CA $509 Roundtrip, found 2 days ago
CA $509
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Fri, Dec 5 from Seattle to St. Louis, returning Mon, Dec 8, priced at CA $509 found 2 days ago
Fri, Oct 3 - Sun, Oct 5
SEA
Seattle
STL
St. Louis
CA $509 Roundtrip, found 2 days ago
CA $509
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Fri, Oct 3 from Seattle to St. Louis, returning Sun, Oct 5, priced at CA $509 found 2 days ago
Sun, Oct 5 - Thu, Oct 9
SEA
Seattle
STL
St. Louis
CA $516 Roundtrip, found 3 days ago
CA $516
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sun, Oct 5 from Seattle to St. Louis, returning Thu, Oct 9, priced at CA $516 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.