Skip to main content
Beginning of main content

Cheap Flights from St. Louis to Seattle $217.58

Search over 321,000 hotels worldwide and 400 airlines worldwide.
Secure incredible value with Expedia's Price Guarantee.
No Expedia cancellation fee to change or cancel almost any hotel reservation.

Here are your best fares found in the past 7 days

The lowest fare found for this route is $264.26 on Tue, Jun 20 from STL to SEA
Flights Fare Calendar Find minimum fare between origin STL and destination SEA Click this button to get previous 30 days data Click this button to get next 30 days data $568 $487 $406 $325 $243 $162 $81 $0 Apr May 30 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T Price is $ 487.67 on United Price is $ 466.4 on Alaska Airlines Price is $ 459.41 on Delta Price is $ 457.4 on Alaska Airlines Price is $ 454.6 on Delta Price is $ 454.6 on Delta Price is $ 448.0 on Alaska Airlines Price is $ 443.6 on Delta Price is $ 437.6 on United Price is $ 435.6 on United Price is $ 435.6 on United Price is $ 421.6 on American Airlines Price is $ 414.6 on American Airlines Price is $ 413.6 on American Airlines Price is $ 412.99 on American Airlines Price is $ 410.6 on United Price is $ 401.88 on Frontier Airlines Price is $ 398.86 on United Price is $ 397.0 on Alaska Airlines Price is $ 396.31 on Alaska Airlines Price is $ 396.31 on Alaska Airlines Price is $ 392.84 on Delta Price is $ 391.6 on Frontier Airlines Price is $ 388.6 on United Price is $ 388.6 on United Price is $ 383.6 on American Airlines Price is $ 382.18 on Alaska Airlines Price is $ 363.6 on United Price is $ 363.6 on United Price is $ 363.6 on United Price is $ 363.6 on United Price is $ 363.6 on American Airlines Price is $ 358.6 on Delta Price is $ 358.0 on United Price is $ 357.0 on Alaska Airlines Price is $ 354.6 on American Airlines Price is $ 354.6 on American Airlines Price is $ 345.6 on United Price is $ 345.6 on United Price is $ 343.83 on Alaska Airlines Price is $ 342.59 on Delta Price is $ 335.13 on United Price is $ 334.6 on American Airlines Price is $ 332.92 on Delta Price is $ 326.03 on United Price is $ 323.6 on United Price is $ 321.16 on Delta Price is $ 308.0 on United Price is $ 300.68 on Delta Price is $ 300.68 on Delta Price is $ 295.49 on Delta Price is $ 295.46 on Delta Price is $ 284.43 on Delta Price is $ 283.25 on Delta Price is $ 277.29 on Delta Price is $ 277.29 on Delta Price is $ 264.26 on Delta

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

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Interesting Facts About Flights from St. Louis to Seattle (STL to SEA)

Question : Is the price you found a good deal?
Answer : Ranging from $217 to $1,115, prices for STL to SEA change less than most routes in the United States. However, the sooner you book, the more you'll be able to save.

Question : On a daily basis, how many different flight times are available from Lambert-St. Louis International Airport (STL) to Seattle-Tacoma International Airport (SEA)?
Answer : Each day is different, but on average, you can expect to see three available departure times. That is lower than the national average of five.

Question : What's the likelihood of you being delayed on this route?
Answer : The best measurement of overall promptness combines both on-time percentage and total delay minutes. STL to SEA currently has 3 stars out of 5, an average performance at best.

Question : Looking for the cheapest flight over the next 30 days?
Answer : As of Apr 24th, the cheapest day to fly from Saint Louis to Seattle is Apr 28th. Tickets are currently being sold for $217, which is 35% below the average price for this route.

Question : If having the most departure times is important to you, is there a particular day of the week that offers the most options?
Answer : The day with the most departure times for this route is Saturday with three options. However, with only two flight times, Wednesday doesn't offer quite as many options when finding that perfect departure time.

Question : Best case scenario, how quickly can someone get from STL to SEA?
Answer : Alaska Airlines can get you there in four hours and 30 minutes. So, if you were to leave Saint Louis at 6:30 AM CDT, you would arrive in Seattle at 9:00 AM PDT (remember, there is a time change of two hours).

Question : If traveling from STL to SEA, how long can you expect to be in the air?
Answer : When flying from STL to SEA, it will take four hours and 32 minutes on average.