Flights from Boston to Key West
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From $321 · Prices update daily
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The quick answer
Flights from Boston to Key West start around $321 round-trip. Airlines on this route include: Frontier Airlines, American Airlines, jetBlue, Allegiant Air (direct flights available). Cheapest month: August; peak: July (about +79%).
Price calendar — next 60 days
★ Cheapest: $321 on Mon, Aug 31 · F9
Lowest return fares · Prices update daily · Final price confirmed at booking
Price calendar — Boston to Key West
Month-by-month lowest fares. Green = cheapest dates.
United States essentials
🇺🇸 Domestic flight — no passport required
Domestic flight — no passport required for US citizens. Bring REAL ID for security.
Full Key West visa guide →🆘 Emergency
911
💱 Currency
US Dollar ($)
🕐 Time zone
UTC−5 to −10
🗣️ Language
English
🔌 Plugs
Type A/B · 120V
🚗 Driving
Right side
💡 Tipping
Expected — 15–20% at restaurants
📞 Dial code
+1
Entry rules can change — always confirm with official sources before booking.
Stay connected in Key West
Skip roaming fees — get a local eSIM before you land. Works in 200+ countries and activates instantly, so you’re online the moment you touch down.
Travel insurance
Protect your Boston to Key West trip against delays, cancellations, and medical emergencies. US travelers can compare plans from top insurers.
Airport transfer in Key West
Pre-book your ride into Key West. Fixed price, meet & greet, and a driver waiting at arrivals — no meter anxiety after a long flight.
Flight delayed or cancelled?
If your Boston to Key West flight was delayed more than 3 hours or cancelled, you may be entitled to up to €600 in compensation under EU/UK rules — even if you flew a non-EU airline. Free to check, no win no fee.
More resources
Boston to Key West — frequently asked
How much is a flight from Boston to Key West?+
Fares start around $321 round-trip, ranging up to about $573 in peak periods. Prices update daily across 800+ airlines.
What is the cheapest month to fly Boston to Key West?+
August typically has the lowest fares, while July is the most expensive (around +79%).
Are there direct flights from Boston to Key West?+
Yes — direct flights are available on this route. Connecting itineraries are often cheaper.
Which airlines fly from Boston to Key West?+
Carriers on this route include Frontier Airlines, American Airlines, jetBlue, Allegiant Air. Compare them side by side in the search above.
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