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

Flights starting at £79. Choose between Frontier Airlines, Alaska Airlines, or United Airlines to find the best price.

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Book your trip to arrive at Seattle–Tacoma International, Kenmore Air Harbor Seaplane Base, Seattle, WA - University of Washington, or Seattle WA - South Lane St. Bus Stop. The distance between St. Louis and Seattle is 2747 km. The most popular airlines for this route are Frontier Airlines, Alaska Airlines, United Airlines, Spirit Airlines, and Harbour Air (Priv). St. Louis and Seattle have 152 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 11.03 - Sun 17.03

AirlineMon 11.03Tue 12.03Wed 13.03Thu 14.03Fri 15.03Sat 16.03Sun 17.03
2112222

Weekly direct flights for Mon 18.03 - Sun 24.03

AirlineMon 18.03Tue 19.03Wed 20.03Thu 21.03Fri 22.03Sat 23.03Sun 24.03
2222222

Weekly direct flights for Mon 25.03 - Sun 31.03

AirlineMon 25.03Tue 26.03Wed 27.03Thu 28.03Fri 29.03Sat 30.03Sun 31.03
2222222

Weekly direct flights for Mon 01.04 - Sun 07.04

AirlineMon 01.04Tue 02.04Wed 03.04Thu 04.04Fri 05.04Sat 06.04Sun 07.04
2222222

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

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
Alaska AirlinesASAASNoOpens 24 days before flight
Closes 1 hours before flight
United AirlinesUALUAYesNo
Spirit AirlinesNKSNKNoOpens 24 days before flight
Closes 1 hours before flight
Harbour Air (Priv)HESYBNoNo

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
250
days per year
Snow days
5
days per year

14 day forecast

Sunday
10 Mar
99%
8°C6°C
17 Mar
18°C7°C
Monday
11 Mar
92%
7°C4°C
18 Mar
16°C7°C
Tuesday
12 Mar
85%
9°C5°C
19 Mar
89%
6°C4°C
Wednesday
13 Mar
89%
10°C4°C
20 Mar
89%
11°C3°C
Thursday
14 Mar
11°C1°C
21 Mar
11°C3°C
Friday
15 Mar
14°C3°C
22 Mar
83%
8°C1°C
Saturday
16 Mar
19°C5°C
23 Mar
77%
11°C3°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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