Cheap flights from St. Louis, MO to Seattle, WA

Flights starting at £78. Choose between Alaska Airlines, United Airlines, or Sun Country Airlines to find the best price.

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Tips to know when travelling to Seattle

Book your trip to arrive at Seattle–Tacoma International, or Kenmore Air Harbor Seaplane Base. The distance between St. Louis and Seattle is 2747 km. The most popular airlines for this route are Alaska Airlines, United Airlines, Sun Country Airlines, and Frontier Airlines. St. Louis and Seattle have 44 direct flights per week.

Weekly direct flights

Discover the top airlines offering direct flights from St. Louis to Seattle in the next month. You’ll find the number of daily direct flights per airline in the table.

Weekly direct flights for Mon 20.05 - Sun 26.05

AirlineMon 20.05Tue 21.05Wed 22.05Thu 23.05Fri 24.05Sat 25.05Sun 26.05
3333333

Weekly direct flights for Mon 27.05 - Sun 02.06

AirlineMon 27.05Tue 28.05Wed 29.05Thu 30.05Fri 31.05Sat 01.06Sun 02.06
3333333

Weekly direct flights for Mon 03.06 - Sun 09.06

AirlineMon 03.06Tue 04.06Wed 05.06Thu 06.06Fri 07.06Sat 08.06Sun 09.06
2333333

Weekly direct flights for Mon 10.06 - Sun 16.06

AirlineMon 10.06Tue 11.06Wed 12.06Thu 13.06Fri 14.06Sat 15.06Sun 16.06
3333333

Check-in for a flight from St. Louis to Seattle

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
Alaska AirlinesASAASNoOpens 24 days before flight
Closes 1 hours before flight
United AirlinesUALUAYesNo
Sun Country AirlinesSCXSYYesNo
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight

Seattle travel tips

1) What are Chihuly Garden and Glass famous for?
2) Please, no heels, only comfy shoes are needed in Seattle
3) What is Seattle Freeze?

Weather in Seattle

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January7°C2°C
February8°C1°C
March10°C3°C
April13°C4°C
May18°C8°C
June21°C10°C
July25°C13°C
August26°C14°C
September22°C11°C
October15°C7°C
November10°C4°C
December6°C1°C
Hottest Month
26°C
August
Coldest month
1°C
February
Sunny days
251
days per year
Snow days
5
days per year

14 day forecast

Tuesday
21 May
92%
10°C6°C
28 May
85%
23°C10°C
Wednesday
22 May
87%
12°C7°C
29 May
88%
13°C10°C
Thursday
23 May
17°C6°C
30 May
17°C8°C
Friday
24 May
87%
15°C7°C
31 May
20°C6°C
Saturday
25 May
80%
16°C6°C
1 Jun
26°C8°C
Sunday
26 May
19°C5°C
2 Jun
28°C12°C
Monday
27 May
22°C8°C
3 Jun
26°C10°C

Frequently asked questions

How long does it take to travel from St. Louis to Seattle?
What is the flight distance between St. Louis and Seattle?
What airlines offer nonstop (direct) flights between St. Louis and Seattle?
What are the most popular routes to and from St. Louis?
What are the most popular routes to and from Seattle?
What airports are near St. Louis?
What airports are near Seattle?
Is it possible to combine flights, buses, and trains in one itinerary when traveling between St. Louis and Seattle?
What is Virtual Interlining and how do I use it?
Which airlines fly between St. Louis and Seattle?
When's the best time to travel between St. Louis and Seattle?
What flights operate between St. Louis and Seattle?
How many airports are there near St. Louis?
How many airports are there near Seattle?
What time do nonstop (direct) flights between St. Louis and Seattle depart?
What time do nonstop (direct) flights between St. Louis and Seattle arrive?
What time do flights between St. Louis and Seattle depart?
What time do flights between St. Louis and Seattle arrive?

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