Take off on cheap flights from St Louis to Seattle, your adventure starts now!

Find cheap airline tickets from St Louis to Seattle by date

  • any
  • May 2018
  • June 2018
  • July 2018
  • August 2018
  • September 2018
  • October 2018
  • November 2018
  • December 2018
  • January 2019
  • February 2019
  • March 2019
  • April 2019
  • any
  • May 2018
  • June 2018
  • July 2018
  • August 2018
  • September 2018
  • October 2018
  • November 2018
  • December 2018
  • January 2019
  • February 2019
  • March 2019
  • April 2019
  • price
  • month of departure
  • month of return
$276
outward: Sep 5, 2018
1:00a STL » 11:12p SEA
Unknown Company 1 stop (22h12m)
inbound: Sep 11, 2018
9:55a SEA » 10:06p STL
Frontier Airlines 1 stop (12h11m)
$278
outward: Sep 5, 2018
1:00a STL » 11:12p SEA
Unknown Company 1 stop (22h12m)
inbound: Sep 11, 2018
2:15p SEA » 10:06p STL
Unknown Company 1 stop (7h51m)
$296
outward: Sep 5, 2018
1:00a STL » 11:12p SEA
Unknown Company 1 stop (22h12m)
inbound: Sep 11, 2018
9:55a SEA » 10:06p STL
Frontier Airlines 1 stop (12h11m)
$352
outward: Jun 21, 2018
1:00p STL » 8:40p SEA
United Airlines 1 stop (7h40m)
inbound: Jun 26, 2018
5:12a SEA » 12:27p STL
Unknown Company 1 stop (7h15m)
$372
outward: Jun 7, 2018
4:30p STL » 9:02a SEA
Frontier Airlines 1 stop (16h32m)
inbound: Jun 15, 2018
9:55a SEA » 10:06p STL
Frontier Airlines 1 stop (12h11m)
$389
outward: Jul 26, 2018
1:04p STL » 5:26p SEA
Alaska Airlines direct (4h22m)
inbound: Aug 4, 2018
3:05a SEA » 6:55a STL
Alaska Airlines direct (3h50m)
$393
outward: Jun 1, 2018
4:30p STL » 9:02a SEA
Frontier Airlines 1 stop (16h32m)
inbound: Aug 4, 2018
9:55a SEA » 10:01p STL
Frontier Airlines 1 stop (12h06m)
$410
outward: Jun 8, 2018
1:00p STL » 9:52p SEA
United Airlines 1 stop (8h52m)
inbound: Jun 17, 2018
12:58a SEA » 7:45a STL
United Airlines 1 stop (6h47m)
$465
outward: Jun 9, 2018
12:45a STL » 8:10a SEA
Southwest Airlines 1 stop (7h25m)
inbound: Jun 15, 2018
9:55a SEA » 10:06p STL
Frontier Airlines 1 stop (12h11m)
$480
outward: Jun 7, 2018
4:30p STL » 9:02a SEA
Frontier Airlines 1 stop (16h32m)
inbound: Jun 16, 2018
5:35p SEA » 11:25p STL
Southwest Airlines 1 stop (5h50m)
Return
Departure
Choose when you'd like to depart to Seattle (USA):
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Airlines operating flights from St Louis to Seattle

  • any
  • May 2018
  • June 2018
  • July 2018
  • August 2018
  • September 2018
  • October 2018
  • November 2018
  • December 2018
  • January 2019
  • February 2019
  • March 2019
  • April 2019
  • all
  • Alaska Airlines
  • United Airlines
United Airlines
outbound: Jun 8, 2018
United Airlines 1 stop
return: Jun 16, 2018
United Airlines 1 stop
Alaska Airlines
outbound: Jun 8, 2018
Alaska Airlines direct
return: Jun 16, 2018
Alaska Airlines 1 stop

Travel tips for flights St Louis - Seattle

Average flight duration: 10h47m (flight with stopovers)

  • Arrival city:
  • Seattle, USA
  • Airport(s):
  • Kenmore Air Harbor Seaplane Base (LKE)
  • Seattle–Tacoma International Airport (SEA)
  • Local time:
  • May 26, 2018 4:34 PM, GMT-7
  • Weather:
  • min. 53ºF, max. 69ºF
  • Departure city:
  • St Louis, USA
  • Airport(s):
  • St. Louis Downtown Airport (CPS)
  • Lambert–St. Louis International Airport (STL)
  • MidAmerica St. Louis Airport (BLV)
  • Spirit of St. Louis Airport (SUS)
  • Local time:
  • May 26, 2018 6:34 PM, GMT-5
  • Weather:
  • min. 72ºF, max. 81ºF