Key West: cheap flights and the best time to go
Sunsets, snorkeling and a laid-back island town. Florida · Beaches, Islands
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Cheapest round trip
Safety level
U.S. U.S. destination: no State Department travel advisory
The State Department's travel advisories
Levels: 1 Exercise normal precautions · 2 Exercise increased caution · 3 Reconsider travel · 4 Do not travel. Read the advisory before you book; it can change. Checked 2026-10-07.
Best time to go
For the weather: March, April, May (beach weather: highs of 78–90°F, not too much rain). With fares from your airport, the best months weigh weather 60% and price 40%.
| Month | High | Low | Rain | Cheapest round trip from JFK |
|---|---|---|---|---|
| January | 75°F | 65°F | 1.8 in | … |
| February | 77°F | 67°F | 1.5 in | … |
| March (a best month) | 79°F | 69°F | 1.5 in | … |
| April (a best month) | 82°F | 73°F | 2.1 in | … |
| May (a best month) | 85°F | 76°F | 3.1 in | … |
| June | 88°F | 79°F | 4.2 in | … |
| July | 90°F | 80°F | 3.6 in | … |
| August | 90°F | 80°F | 5.4 in | … |
| September | 88°F | 79°F | 7.0 in | … |
| October | 85°F | 77°F | 5.7 in | … |
| November | 80°F | 72°F | 2.0 in | … |
| December | 77°F | 68°F | 2.2 in | … |
Typical daily high and low and total rain, 1991–2020: NOAA NCEI GHCN-Daily, station KEY W INTL AP (3 km away). ★ = the best three months. Fares are the cheapest found for trips leaving that month in the next year.
Prices are per seat for a round trip in economy; with more than one traveler they're the total for your party (babies under 2 on a lap need no seat). The booking site shows the final price for everyone.