Cheap flights from Sidney, MT to St. Louis, MO
Choose between Cape Air, American Airlines, or Allegiant Air to find the best price
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Tips to know when travelling to St. Louis
Cheapest nonstop round-trip | £537 |
---|---|
Most popular airline | Cape Air |
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Book your trip to arrive at St. Louis Lambert International, or St. Louis Union Station. The most popular airlines for this route are Cape Air, American Airlines, Allegiant Air, Frontier Airlines, and Alaska Airlines. Sidney and St. Louis have 33 direct flights per week.
Check-in for a flight from Sidney to St. Louis
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
---|---|---|---|---|
Cape Air | KAP | 9K | Yes | No |
American Airlines | AAL | AA | No | No |
Allegiant Air | AAY | G4 | No | Opens 24 days before flight Closes 1 hours before flight |
Frontier Airlines | FFT | F9 | No | Opens 24 days before flight Closes 1 hours before flight |
Alaska Airlines | ASA | AS | No | Opens 24 days before flight Closes 1 hours before flight |
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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