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 $246 round trip and CA $123 one way. Prices and availability subject to change. Additional terms may apply.

Tue, Aug. 19 - Tue, Aug. 26
SEA
Seattle
STL
St. Louis
CA $246 Roundtrip, found 1 day ago
CA $246
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Aug. 19 from Seattle to St. Louis, returning Tue, Aug. 26, priced at CA $246 found 1 day ago
Tue, Aug. 19 - Mon, Aug. 25
SEA
Seattle
STL
St. Louis
CA $254 Roundtrip, found 1 day ago
CA $254
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Aug. 19 from Seattle to St. Louis, returning Mon, Aug. 25, priced at CA $254 found 1 day ago
Wed, Aug. 20 - Sat, Aug. 23
SEA
Seattle
STL
St. Louis
CA $275 Roundtrip, found 1 day ago
CA $275
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Aug. 20 from Seattle to St. Louis, returning Sat, Aug. 23, priced at CA $275 found 1 day ago
Wed, Sep. 24 - Wed, Oct. 1
SEA
Seattle
STL
St. Louis
CA $297 Roundtrip, found 1 day ago
CA $297
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, Sep. 24 from Seattle to St. Louis, returning Wed, Oct. 1, priced at CA $297 found 1 day ago
Wed, Sep. 10 - Tue, Sep. 16
SEA
Seattle
STL
St. Louis
CA $301 Roundtrip, found 4 days ago
CA $301
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Wed, Sep. 10 from Seattle to St. Louis, returning Tue, Sep. 16, priced at CA $301 found 4 days ago
Wed, Aug. 20 - Sat, Aug. 23
SEA
Seattle
STL
St. Louis
CA $302 Roundtrip, found 1 day ago
CA $302
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Aug. 20 from Seattle to St. Louis, returning Sat, Aug. 23, priced at CA $302 found 1 day ago
Thu, Aug. 21 - Tue, Aug. 26
SEA
Seattle
STL
St. Louis
CA $310 Roundtrip, found 20 hours ago
CA $310
Roundtrip
found 20 hours ago
Select Alaska Airlines flight, departing Thu, Aug. 21 from Seattle to St. Louis, returning Tue, Aug. 26, priced at CA $310 found 20 hours ago
Thu, Aug. 21 - Tue, Aug. 26
SEA
Seattle
STL
St. Louis
CA $315 Roundtrip, found 20 hours ago
CA $315
Roundtrip
found 20 hours ago
Select Alaska Airlines flight, departing Thu, Aug. 21 from Seattle to St. Louis, returning Tue, Aug. 26, priced at CA $315 found 20 hours ago
Fri, Aug. 22 - Tue, Aug. 26
SEA
Seattle
STL
St. Louis
CA $317 Roundtrip, found 1 day ago
CA $317
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Fri, Aug. 22 from Seattle to St. Louis, returning Tue, Aug. 26, priced at CA $317 found 1 day ago
Thu, Aug. 21 - Mon, Aug. 25
SEA
Seattle
STL
St. Louis
CA $325 Roundtrip, found 1 day ago
CA $325
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Thu, Aug. 21 from Seattle to St. Louis, returning Mon, Aug. 25, priced at CA $325 found 1 day 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.