Cheap flights from St. Louis to Puget Sound

View AU$144 flight on Tue, 2 Sep. 2025Opens in a new window

Popular airlines from St. Louis to Puget Sound

  • Jetstar

    Jetstar

  • Qantas Airways

    Qantas Airways

  • Virgin Australia

    Virgin Australia

  • Scoot

    Scoot

  • American Airlines

    American Airlines

  • Emirates

    Emirates

  • United

    United

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 35% on select hotels after you book a flight*
  • payments icon
    Earn twice
    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from St. Louis (STL) to Puget Sound (SEA)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sun, 17 Aug. - Sun, 24 Aug.
STL
St. Louis
SEA
Seattle
AU$461 Return, found 4 days ago
AU$461
Return
found 4 days ago
Select Alaska Airlines flight, departing Sun, 17 Aug. from St. Louis to Seattle, returning Sun, 24 Aug., priced at AU$461 found 4 days ago
Alaska Airlines
Sun, 17 Aug. - Sun, 24 Aug.
STL
St. Louis
SEA
Seattle
AU$495 Return, found 4 days ago
AU$495
Return
found 4 days ago
Select Alaska Airlines flight, departing Sun, 17 Aug. from St. Louis to Seattle, returning Sun, 24 Aug., priced at AU$495 found 4 days ago
Alaska Airlines
Sun, 17 Aug. - Sun, 24 Aug.
STL
St. Louis
SEA
Seattle
AU$498 Return, found 4 days ago
AU$498
Return
found 4 days ago
Select Alaska Airlines flight, departing Sun, 17 Aug. from St. Louis to Seattle, returning Sun, 24 Aug., priced at AU$498 found 4 days ago
Delta
Sun, 17 Aug. - Sun, 24 Aug.
STL
St. Louis
SEA
Seattle
AU$514 Return, found 4 days ago
AU$514
Return
found 4 days ago
Select Delta flight, departing Sun, 17 Aug. from St. Louis to Seattle, returning Sun, 24 Aug., priced at AU$514 found 4 days ago
United
Sun, 17 Aug. - Sun, 24 Aug.
STL
St. Louis
SEA
Seattle
AU$521 Return, found 4 days ago
AU$521
Return
found 4 days ago
Select United flight, departing Sun, 17 Aug. from St. Louis to Seattle, returning Sun, 24 Aug., priced at AU$521 found 4 days ago
American Airlines
Sun, 17 Aug. - Sun, 24 Aug.
STL
St. Louis
SEA
Seattle
AU$529 Return, found 4 days ago
AU$529
Return
found 4 days ago
Select American Airlines flight, departing Sun, 17 Aug. from St. Louis to Seattle, returning Sun, 24 Aug., priced at AU$529 found 4 days ago
*Available to Expedia members.