Cheap flights from San Antonio, TX to Key West, FL
Flights starting at $138. Choose between Spirit Airlines, Silver Airways, or Frontier Airlines to find the best price.
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Tips to know when travelling to Key West
Cheapest one-way trip | $330 |
---|---|
Cheapest round-trip | $716 |
Most popular airline | Spirit Airlines |
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The most popular airlines for this route are Spirit Airlines, Silver Airways, Frontier Airlines, Allegiant Air, and United Airlines. San Antonio and Key West have 108 direct flights per week.
Check-in for a flight from San Antonio to Key West
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
---|---|---|---|---|
Spirit Airlines | NKS | NK | No | Opens 24 days before flight Closes 1 hours before flight |
Silver Airways | SIL | 3M | No | Opens 24 days before flight Closes 2 hours before flight |
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 |
Weather in Key West
Average Weather
Month | Average monthly max temperature | Average monthly min temperature |
January | 22°C | 20°C |
February | 23°C | 21°C |
March | 23°C | 22°C |
April | 25°C | 24°C |
May | 26°C | 25°C |
June | 28°C | 27°C |
July | 29°C | 28°C |
August | 29°C | 28°C |
September | 29°C | 28°C |
October | 27°C | 26°C |
November | 25°C | 24°C |
December | 24°C | 22°C |
14 day forecast
Frequently asked questions
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