Cheap flights from Boston to Key West from $139

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Info about flights from Boston to Key West

Some useful info about flights from Boston to Key West to help you plan your next trip

Best price last 15 days $139
Average flight duration 4h 4m
Cheapest month December
Average number of flights per week 3
First flight time 02:30
Last flight time 22:00
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How much is a ticket from Boston to Key West?

Depending on when you travel and how far in advance you book, fares between Boston and Key West can differ a lot.

The lowest fare seen in the past 15 days was $139.

If you’re flexible with timing, consider overnight flights — they often cost less and are less crowded. Exploring multiple date and time combinations can help you find the cheapest solution.

Best airport options between Boston and Key West

If you're open to flying into or out of more than one airport, you’ll have more routes to compare.

  • Airports in Boston: Boston - Logan is the only operating airport.
  • Airports in Key West: Key West - International is the sole airport currently available.

Some airports offer extras like lounges, fast track, or self check-in — good to keep in mind. Comparing airports by services offered helps you balance cost and comfort.

Customize your flight from Boston to Key West

Jetcost allows you to filter by travel dates, duration, layovers, carriers, and booking providers. You’ll find direct and connecting flights, one-way or round-trip, from Delta, American, United, Expedia, eDreams, and more.

Other popular destinations

Thinking about United States? You might also consider: Las Vegas, Los Angeles, Miami, New York City, Orlando.

You can sort results by price, duration, or departure time to find the best option for you. When available, results always include both low-cost and traditional airlines.
Frequently Asked Questions

Frequently asked questions about flights from Boston to Key West.

How much does an airline ticket from Boston to Key West cost?

The lowest price recorded in the last 15 days for a flight from Boston to Key West is $139.

How far is Boston from Key West?

Boston is about 1375 mi from Key West.

What are the airports in Key West?

Key West has one airport: Key West - International.

What are the airports in Boston?

Boston has one airport: Boston - Logan.

What are the most popular cities in United States?

The most popular cities in United States according to our users' searches are: Las Vegas, Los Angeles, Miami, New York City, Orlando.

When should I book a flight from Boston to Key West?

The best time to book a flight from Boston to Key West is 1 month in advance, while the worst time is 35 weeks in advance.

What is the cheapest month to fly from Boston to Key West?

The cheapest month to fly from Boston to Key West is December.

What is the most expensive month to fly from Boston to Key West?

The most expensive month to fly from Boston to Key West is November.

What is the best day of the week to fly from Boston to Key West?

For flights from Boston to Key West Friday is on average the cheapest day to fly, while Friday is the most expensive day to fly.