Cheap flights from Knoxville, TN to St. Louis, MO
Flights starting at $95. Choose between Frontier Airlines, Allegiant Air, or United Airlines to find the best price.
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Tips to know when travelling to St. Louis
Cheapest one-way trip | $189 |
---|---|
Cheapest round-trip | $388 |
Most popular airline | Frontier Airlines |
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The most popular airlines for this route are Frontier Airlines, Allegiant Air, United Airlines, Spirit Airlines, and Southern Airways Express. Knoxville and St. Louis have 106 direct flights per week.
Check-in for a flight from Knoxville to St. Louis
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
---|---|---|---|---|
Frontier Airlines | FFT | F9 | No | Opens 24 days before flight Closes 1 hours before flight |
Allegiant Air | AAY | G4 | No | Opens 24 days before flight Closes 1 hours before flight |
United Airlines | UAL | UA | Yes | No |
Spirit Airlines | NKS | NK | No | Opens 24 days before flight Closes 1 hours before flight |
Southern Airways Express | FDY | 9X | 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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Airports near Knoxville
- Nashville International
- McGhee Tyson
- Asheville Regional
- Greenville–Spartanburg International
- Blue Grass
- Chattanooga Metropolitan
- Tri-Cities Regional