Cheap flights from Seattle, WA to St. Louis, MO
Flights starting at $123. Choose between United Airlines, Alaska Airlines, or Sun Country Airlines to find the best price.
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Tips to know when travelling to St. Louis
Cheapest one-way trip | $123 |
---|---|
Cheapest round-trip | $236 |
Average round-trip | $389 |
Nonstop flights in May | $145 – $699 |
Most popular airline | United Airlines |
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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 United Airlines, Alaska Airlines, and Sun Country Airlines. Seattle and St. Louis have 42 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 28.04 - Sat 04.05
Airline | Sun 28.04 | Mon 29.04 | Tue 30.04 | Wed 01.05 | Thu 02.05 | Fri 03.05 | Sat 04.05 |
---|---|---|---|---|---|---|---|
2 | 1 | 2 | 2 | 2 | 2 | 2 |
Weekly direct flights for Sun 05.05 - Sat 11.05
Airline | Sun 05.05 | Mon 06.05 | Tue 07.05 | Wed 08.05 | Thu 09.05 | Fri 10.05 | Sat 11.05 |
---|---|---|---|---|---|---|---|
2 | 2 | 2 | 2 | 2 | 2 | 2 |
Weekly direct flights for Sun 12.05 - Sat 18.05
Airline | Sun 12.05 | Mon 13.05 | Tue 14.05 | Wed 15.05 | Thu 16.05 | Fri 17.05 | Sat 18.05 |
---|---|---|---|---|---|---|---|
2 | 2 | 2 | 2 | 3 | 3 | 3 |
Weekly direct flights for Sun 19.05 - Sat 25.05
Airline | Sun 19.05 | Mon 20.05 | Tue 21.05 | Wed 22.05 | Thu 23.05 | Fri 24.05 | Sat 25.05 |
---|---|---|---|---|---|---|---|
3 | 3 | 3 | 3 | 3 | 2 | 3 |
Check-in for a flight from Seattle to St. Louis
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
---|---|---|---|---|
United Airlines | UAL | UA | Yes | No |
Alaska Airlines | ASA | AS | No | Opens 24 days before flight Closes 1 hours before flight |
Sun Country Airlines | SCX | SY | Yes | No |
Weather in St. Louis
Average Weather
Month | Average monthly max temperature | Average monthly min temperature |
January | 3°C | -3°C |
February | 6°C | -2°C |
March | 13°C | 3°C |
April | 18°C | 8°C |
May | 24°C | 14°C |
June | 29°C | 19°C |
July | 31°C | 21°C |
August | 30°C | 20°C |
September | 27°C | 16°C |
October | 20°C | 10°C |
November | 12°C | 3°C |
December | 7°C | 0°C |
14 day forecast
Frequently asked questions
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