Cheap flights from Seattle, WA to Key West, FL
Flights starting at £114. Choose between Silver Airways, Frontier Airlines, or Alaska Airlines to find the best price.
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Tips to know when travelling to Key West
Cheapest one-way trip | £222 |
---|---|
Cheapest round-trip | £522 |
Most popular airline | Silver Airways |
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Travelers usually depart from Seattle–Tacoma International, or Kenmore Air Harbor Seaplane Base when they travel from Seattle to Key West. The most popular airlines for this route are Silver Airways, Frontier Airlines, Alaska Airlines, Allegiant Air, and Spirit Airlines. Seattle and Key West have 248 direct flights per week.
Check-in for a flight from Seattle to Key West
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
---|---|---|---|---|
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 |
Alaska Airlines | ASA | AS | 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 |
Spirit Airlines | NKS | NK | No | Opens 24 days before flight Closes 1 hours before flight |
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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