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Latest Flight Deals from Seattle to St. Louis

Book one-way or return flights from Seattle to St. Louis from as little as £36. Choose from the popular airlines below and book your flight today!

  • One way
  • Round-trip
      • SEA21:19
        11h 27m
        1 stop
        STL10:46
        Tue, May 7|Seattle - St. Louis|Spirit Airlines
        £36£73
        51% OFF
        51% OFF
        £73£36
      • SEA09:55
        9h 8m
        1 stop
        STL21:03
        Mon, May 6|Seattle - St. Louis|Frontier Airlines
        £46£73
        37% OFF
        37% OFF
        £73£46
      • SEA21:35
        10h 12m
        1 stop
        STL09:47
        Tue, May 7|Seattle - St. Louis|Frontier Airlines
        £51£73
        30% OFF
        30% OFF
        £73£51
      • SEA21:32
        14h 57m
        1 stop
        STL14:29
        Sat, May 4|Seattle - St. Louis|Frontier Airlines
        £52
        £52
      • SEA22:34
        9h 13m
        1 stop
        STL09:47
        Fri, May 3|Seattle - St. Louis|Frontier Airlines
        £53
        £53
      • SEA17:58
        14h 40m
        1 stop
        STL10:38
        Wed, May 1|Seattle - St. Louis|Frontier Airlines
        £53
        £53
      • SEA20:14
        11h 22m
        1 stop
        STL09:36
        Tue, May 21|Seattle - St. Louis|Frontier Airlines
        £54
        £54
      • SEA18:29
        16h 40m
        1 stop
        STL13:09
        Mon, May 20|Seattle - St. Louis|Frontier Airlines
        £54
        £54
      • SEA21:40
        10h 38m
        1 stop
        STL10:18
        Wed, May 8|Seattle - St. Louis|Spirit Airlines
        £57
        £57
      • SEA09:55
        8h 44m
        1 stop
        STL20:39
        Wed, May 8|Seattle - St. Louis|Frontier Airlines
        £57
        £57
      • SEA13:00
        3h 5m
        Direct
        STL14:00
        Sat, May 4|Seattle - St. Louis|Spirit Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Searching for the best last minute flight from Seattle to St. Louis? Find one-way or return flights that are affordable and fit your itinerary.

Trip.com monitors the ticket fares of flights from Seattle to St. Louis. Stay updated on price trends and snag the best deals for your upcoming trip.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Airlines Flying from Seattle to St. Louis

View airlines operating flights from Seattle to St. Louis. Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Spirit Airlines
From £36
Frontier Airlines
From £46
American Airlines
From £72
Alaska Airlines
From £81
Delta Air Lines
From £81
Sun Country Airlines
From £103
United Airlines
From £107
Southwest Airlines
From £303
ANA airlines

Find more flights and airlines

Alternative Routes from Seattle to St. Louis

Discover different routes, airlines, and transfers and find the best alternative flights for your journey from Seattle to St. Louis.

  • Cheapest
    Spirit Airlines
    SEA
    21:19
    11h 27m
    1 transfer
    STL
    10:46
    Seattle-Tacoma International Airport - St. Louis Lambert International Airport
    Tue, May 7Spirit Airlines
    £36
  • Spirit Airlines
    SEA
    21:19
    11h 27m
    1 transfer
    STL
    10:46
    Seattle-Tacoma International Airport - St. Louis Lambert International Airport
    Tue, May 7Spirit Airlines
    £36
    Find More Flights

How do I find the cheapest flights?

  • When are flight tickets from Seattle (SEA) to St. Louis (STL) the cheapest?

    Airlines adjust prices for flights from Seattle to St. Louis based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much are flights from Seattle (SEA) to St. Louis (STL) cost?

    According to Trip.com's data, the lowest price is around £279.

  • How long is the flight from Seattle (SEA) to St. Louis (STL)?

    It takes about 4 hours 12 minutes to fly from Seattle (SEA) to St. Louis (STL).

  • What is the transportation method from the main airport to downtown in St. Louis?

    • The distance from St. Louis Lambert International Airport to downtown is about 20km, by taxi about 40 minutes.

  • What are the most popular airlines that fly from Seattle (SEA) to St. Louis (STL)?

    Airlines with flights from Seattle (SEA) to St. Louis (STL): Qatar Airways, Alaska Airlines, Air Tahiti Nui, Japan Airlines, United Airlines, American Airlines and Singapore Airlines.

  • What's the most popular airline for direct flights from Seattle (SEA) to St. Louis (STL)?

    American Airlines operates 1 direct flights from Seattle (SEA) to St. Louis (STL).

  • How many airports in St. Louis (STL)?

How to find a cheap flight from Seattle to St. Louis

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Seattle to St. Louis. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com
Flight Information from Seattle to St. Louis

Cheapest direct flight price

£36

Cheapest return ticket price

£167

Cheapest month

April

Peak season for travel

October

Flight distance

2,765.15km

Average flight time

4 hours 12 minutes

Popular airline

American Airlines

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