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

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Travelers usually depart from Seattle–Tacoma International, or Kenmore Air Harbor Seaplane Base when they travel from Seattle to St. Louis. The distance between Seattle and St. Louis is 2747 km. The most popular airlines for this route are Alaska Airlines, and United Airlines. Seattle and St. Louis have 44 direct flights per week.

Weekly direct flights

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

Weekly direct flights for Sun 12.05 - Sat 18.05

AirlineSun 12.05Mon 13.05Tue 14.05Wed 15.05Thu 16.05Fri 17.05Sat 18.05
2222233

Weekly direct flights for Sun 19.05 - Sat 25.05

AirlineSun 19.05Mon 20.05Tue 21.05Wed 22.05Thu 23.05Fri 24.05Sat 25.05
3333333

Weekly direct flights for Sun 26.05 - Sat 01.06

AirlineSun 26.05Mon 27.05Tue 28.05Wed 29.05Thu 30.05Fri 31.05Sat 01.06
3333333

Weekly direct flights for Sun 02.06 - Sat 08.06

AirlineSun 02.06Mon 03.06Tue 04.06Wed 05.06Thu 06.06Fri 07.06Sat 08.06
3333333

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

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

Weather in St. Louis

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January3°C-3°C
February6°C-2°C
March13°C3°C
April18°C8°C
May24°C14°C
June29°C19°C
July31°C21°C
August30°C20°C
September27°C16°C
October20°C10°C
November12°C3°C
December7°C0°C
Hottest Month
31°C
July
Coldest month
-3°C
January
Sunny days
261
days per year
Snow days
9
days per year

14 day forecast

Tuesday
14 May
98%
22°C17°C
21 May
88%
19°C18°C
Wednesday
15 May
23°C13°C
22 May
28°C18°C
Thursday
16 May
83%
23°C16°C
23 May
89%
27°C19°C
Friday
17 May
83%
20°C17°C
24 May
88%
29°C18°C
Saturday
18 May
81%
20°C17°C
25 May
89%
26°C19°C
Sunday
19 May
24°C16°C
26 May
24°C16°C
Monday
20 May
26°C14°C
27 May
25°C14°C

Frequently asked questions

How long does it take to travel from Seattle to St. Louis?
What is the flight distance between Seattle and St. Louis?
What airlines offer nonstop (direct) flights between Seattle and St. Louis?
What are the most popular routes to and from Seattle?
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Which airports are there in Seattle?
What airports are near Seattle?
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Is it possible to combine flights, buses, and trains in one itinerary when traveling between Seattle and St. Louis?
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