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Cheap flights from Boston to Key West from $79

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Key West departing on 12/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

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Multiple Airlines Logo
5:34 am - 11:56 am
BOS
-
EYW
6h 22m1 stop
Multiple Airlines Logo
10:06 am - 2:38 pm
EYW
-
BOS
28h 32m1 stop
$274Multiple Airlines
dom., ene. 18 - dom., ene. 25
United Airlines Logo
5:20 am - 3:17 pm
BOS
-
EYW
9h 57m2 stops
United Airlines Logo
6:05 pm - 11:49 pm
EYW
-
BOS
5h 44m1 stop
$275United Airlines
mar., ene. 6 - mar., ene. 13
United Airlines Logo
5:20 am - 3:12 pm
BOS
-
EYW
9h 52m2 stops
United Airlines Logo
2:05 pm - 11:49 pm
EYW
-
BOS
9h 44m2 stops
$276United Airlines
jue., ene. 1 - sáb., ene. 31
United Airlines Logo
6:00 am - 1:03 pm
BOS
-
EYW
7h 03m1 stop
United Airlines Logo
2:25 pm - 9:52 pm
EYW
-
BOS
7h 27m1 stop
$277United Airlines
lun., ene. 26 - vie., ene. 30
Delta Logo
1:30 pm - 7:40 pm
BOS
-
EYW
6h 10m1 stop
Delta Logo
2:45 pm - 8:31 pm
EYW
-
BOS
5h 46m1 stop
$278Delta
vie., ene. 23 - mar., ene. 27
Multiple Airlines Logo
11:55 am - 1:30 pm
BOS
-
EYW
25h 35m1 stop
Multiple Airlines Logo
10:49 am - 11:57 pm
EYW
-
BOS
13h 08m2 stops
$280Multiple Airlines
dom., ene. 4 - sáb., ene. 10
Multiple Airlines Logo
5:27 pm - 10:09 am
BOS
-
EYW
40h 42m2 stops
Multiple Airlines Logo
10:06 am - 11:19 pm
EYW
-
BOS
13h 13m1 stop
$281Multiple Airlines
lun., ene. 12 - dom., ene. 18
American Airlines Logo
8:15 am - 12:32 pm
BOS
-
EYW
4h 17mnonstop
American Airlines Logo
5:24 pm - 10:55 pm
EYW
-
BOS
5h 31m1 stop
$282American Airlines
sáb., ene. 10 - vie., ene. 16
American Airlines Logo
8:00 am - 3:33 pm
BOS
-
EYW
7h 33m1 stop
American Airlines Logo
1:10 pm - 4:45 pm
EYW
-
BOS
3h 35mnonstop
$283American Airlines
jue., ene. 1 - sáb., ene. 31
Multiple Airlines Logo
6:00 am - 10:09 am
BOS
-
EYW
28h 09m2 stops
Multiple Airlines Logo
12:15 pm - 11:57 pm
EYW
-
BOS
11h 42m1 stop
$284Multiple Airlines
mar., feb. 3 - jue., feb. 19

American Airlines flights from Boston to Key West

Our best American Airlines deals on Boston to Key West flight tickets
American Airlines
Dec 17
BOS7:20 amBoston Logan Intl
8h 04m
1 stop
EYW3:24 pmKey West
Dec 21
EYW3:25 pmKey West
3h 34m
BOS6:59 pmBoston Logan Intl
$277
Find similar
American Airlines
Jan 10
BOS8:15 amBoston Logan Intl
4h 17m
EYW12:32 pmKey West
Jan 16
EYW5:24 pmKey West
5h 31m
1 stop
BOS10:55 pmBoston Logan Intl
$282
Find similar
American Airlines
Jan 1
BOS8:00 amBoston Logan Intl
7h 33m
1 stop
EYW3:33 pmKey West
Jan 31
EYW1:10 pmKey West
3h 35m
BOS4:45 pmBoston Logan Intl
$283
Find similar

United Airlines flights from Boston to Key West

Our best United Airlines deals on Boston to Key West flight tickets
United Airlines
Jan 6
BOS5:20 amBoston Logan Intl
9h 57m
2 stops
EYW3:17 pmKey West
Jan 13
EYW6:05 pmKey West
5h 44m
1 stop
BOS11:49 pmBoston Logan Intl
$275
Find similar
United Airlines
Jan 1
BOS5:20 amBoston Logan Intl
9h 52m
2 stops
EYW3:12 pmKey West
Jan 31
EYW2:05 pmKey West
9h 44m
2 stops
BOS11:49 pmBoston Logan Intl
$276
Find similar
United Airlines
Jan 26
BOS6:00 amBoston Logan Intl
7h 03m
1 stop
EYW1:03 pmKey West
Jan 30
EYW2:25 pmKey West
7h 27m
1 stop
BOS9:52 pmBoston Logan Intl
$277
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Boston to Key West that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated diciembre 8, 2025.
Use the filters below to find and compare flights from Boston to Key West that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonKey West

BOS - EYW

BOSEYW

Boston Logan Intl

dom. 1/18

5:34 am-11:56 am

1 stop6h 22m

Key West

dom. 1/25

10:06 am-2:38 pm

1 stop28h 32m

$274

BostonKey West

BOS - EYW

BOSEYW

Boston Logan Intl

mar. 1/6

5:20 am-3:17 pm

2 stops9h 57m

Key West

mar. 1/13

6:05 pm-11:49 pm

1 stop5h 44m

$275

BostonKey West

BOS - EYW

BOSEYW

Boston Logan Intl

jue. 1/1

5:20 am-3:12 pm

2 stops9h 52m

Key West

sáb. 1/31

2:05 pm-11:49 pm

2 stops9h 44m

$276

BostonKey West

BOS - EYW

BOSEYW

Boston Logan Intl

lun. 1/26

6:00 am-1:03 pm

1 stop7h 03m

Key West

vie. 1/30

2:25 pm-9:52 pm

1 stop7h 27m

$277

BostonKey West

BOS - EYW

BOSEYW

Boston Logan Intl

vie. 1/23

1:30 pm-7:40 pm

1 stop6h 10m

Key West

mar. 1/27

2:45 pm-8:31 pm

1 stop5h 46m

$278

BostonKey West

BOS - EYW

BOSEYW

Boston Logan Intl

dom. 1/4

11:55 am-1:30 pm

1 stop25h 35m

Key West

sáb. 1/10

10:49 am-11:57 pm

2 stops13h 08m

$280

BostonKey West

BOS - EYW

BOSEYW

Boston Logan Intl

lun. 1/12

5:27 pm-10:09 am

2 stops40h 42m

Key West

dom. 1/18

10:06 am-11:19 pm

1 stop13h 13m

$281

BostonKey West

BOS - EYW

BOSEYW

Boston Logan Intl

sáb. 1/10

8:15 am-12:32 pm

Nonstop4h 17m

Key West

vie. 1/16

5:24 pm-10:55 pm

1 stop5h 31m

$282

BostonKey West

BOS - EYW

BOSEYW

Boston Logan Intl

jue. 1/1

8:00 am-3:33 pm

1 stop7h 33m

Key West

sáb. 1/31

1:10 pm-4:45 pm

Nonstop3h 35m

$283

BostonKey West

BOS - EYW

BOSEYW

Boston Logan Intl

mar. 2/3

6:00 am-10:09 am

2 stops28h 09m

Key West

jue. 2/19

12:15 pm-11:57 pm

1 stop11h 42m

$284

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Key West from

How to get the cheapest flight ticket from Boston to Key West

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Key West?

In general, September is the cheapest month to fly from Boston to Key West. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $316. If you are unable to visit Key West during the month of September, then departing from Boston during the month August is also very affordable. Most momondo users find prices during this month for around $351.

What is the cheapest day to depart on your flight to Key West?

On average, the least expensive day to fly to Key West from Boston is on a Sunday. momondo users have found tickets for Sunday departures for as low as $439. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Boston to Key West for around $617.

What is the cheapest time of day to depart on your flight to Key West?

According to our data, the cheapest time of day to fly to Key West is at noon. momondo users have found flights departing from Boston to Key West at noon for as low as $415. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Key West are more costly in the morning, with an average ticket price of $498. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Boston Logan Intl to Key West flight route?

Fly from Boston Logan Intl to Key West for the best Boston Logan Intl - Key West flight prices

How far in advance should I book a flight to Key West?

You are more likely to see cheaper flights to Key West from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to Key West for around $419 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Key West from Boston for as low as $369 on momondo.

What cabin class options are available on Boston Logan Intl to Key West flights?

There are 3 cabin classes available to choose from on Boston Logan Intl to Key West flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Boston to Key West flights?

No. A direct flight is the cheapest option for a flight between Boston to Key West.

How have Boston to Key West flight prices changed over time?

As of December 2025, prices for Boston to Key West flights are approximately 32% more expensive when compared to flights at the same time last year.

When to book flights from Boston to Key West

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to Key West according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Boston to Key West (BOS to EYW) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Key West

Best Price Found

$201

Fastest flight time

3h 52m

Direct flights

Every day

Airports in Key West

1 airport
The best one-way flight to Key West from Boston in the past 72 hours is $201. The best round-trip flight deal from Boston to Key West found on momondo in the last 72 hours is $332.
The fastest flight from Boston to Key West takes 3h 52m
Direct flights go from Boston to Key West every day.
There is 1 airport near Key West: Key West (EYW)
Search flight deals

  • How far is Boston Logan Intl to Key West by plane?

    Key West is 1373.6 mi away from Boston Logan Intl. Flights usually cover this in 3h 53m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to Key West Airport?

    Prices for flights from Boston Logan Intl Airport to Key West Airport were last updated today.

  • How many operators does momondo search for flights from Boston Logan Intl Airport to Key West Airport?

  • How old do you have to be to fly from Boston Logan Intl Airport to Key West Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Boston Logan Intl Airport to Key West Airport.

  • What documentation or ID do you need to fly to Key West Airport?

    The travel and health documents you'll need for your trip to Key West Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Key West Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Boston to Key West?

  • What is the most popular airline from Boston to Key West?

Best airlines flying from Boston to Key West

Compare and see reviews for airlines that fly from Boston to Key West with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $66Free CancellationRating
6.3
8,168 reviews
Search Spirit Airlines flights
United AirlinesPriceFrom $135Free CancellationRating
7.4
9,089 reviews
Search United Airlines flights
DeltaPriceFrom $178Free CancellationRating
7.9
8,011 reviews
Search Delta flights
JetBluePriceFrom $240Free CancellationRating
7.2
2,899 reviews
Search JetBlue flights
American AirlinesPriceFrom $250Free CancellationRating
7.2
11,045 reviews
Search American Airlines flights

  • JetBlue Flights From Boston to Key West

    JetBlue flight deals from Boston to Key West start from $240 round-trip. Over the 4 JetBlue flights for this route in a normal week, average airfare is usually $525 round-trip - but some users have found much cheaper deals with momondo.

Traveling to a place near Key West?

Book flights to Key West if you plan to visit one of these locations
Big Pine Key
Little Torch Key

Why use momondo?

Why should I use momondo to find a flight deal from Boston to Key West?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Boston to Key West for you.

Can I find flights from Boston to Key West with flexible booking policies on momondo?

momondo does allow users to show only those flights to Key West from Boston which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Boston to Key West?

momondo helps you find the best flight between Boston and Key West by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Boston to Key West right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Key West, momondo offers a useful price alert feature which will track prices for flights to Key West from Boston and alert you when they change.

An easier way to manage your Key West trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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