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Cheap flights from Boston to Florida Keys from $64

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 Florida Keys departing on 2/20. 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

Enter your travel dates to find the best prices.
Spirit Airlines Logo
5:50 pm - 9:32 pm
BOS
-
MIA
3h 42mnonstop
Spirit Airlines Logo
8:37 pm - 11:59 pm
MIA
-
BOS
3h 22mnonstop
$84Spirit Airlines
Sat, Feb 21 - Tue, Mar 3
Spirit Airlines Logo
3:54 pm - 7:32 pm
BOS
-
MIA
3h 38mnonstop
Spirit Airlines Logo
1:21 pm - 4:45 pm
MIA
-
BOS
3h 24mnonstop
$85Spirit Airlines
Thu, Feb 19 - Thu, Mar 5
Spirit Airlines Logo
5:53 pm - 9:35 pm
BOS
-
MIA
3h 42mnonstop
Spirit Airlines Logo
12:55 pm - 4:18 pm
MIA
-
BOS
3h 23mnonstop
$87Spirit Airlines
Sun, Feb 1 - Fri, Feb 6
Spirit Airlines Logo
5:53 pm - 9:35 pm
BOS
-
MIA
3h 42mnonstop
Spirit Airlines Logo
8:37 pm - 11:59 pm
MIA
-
BOS
3h 22mnonstop
$89Spirit Airlines
Fri, Feb 6 - Tue, Mar 3
Spirit Airlines Logo
3:54 pm - 7:32 pm
BOS
-
MIA
3h 38mnonstop
Spirit Airlines Logo
10:39 am - 1:55 pm
MIA
-
BOS
3h 16mnonstop
$90Spirit Airlines
Mon, Mar 9 - Fri, Mar 13
Multiple Airlines Logo
5:53 pm - 9:35 pm
BOS
-
MIA
3h 42mnonstop
Multiple Airlines Logo
6:57 pm - 1:13 am
MIA
-
BOS
6h 16m
1 stop
$95Multiple Airlines
Wed, Feb 4 - Tue, Feb 10
United Airlines Logo
6:00 am - 3:06 pm
BOS
-
EYW
9h 06m
2 stops
United Airlines Logo
4:05 pm - 1:09 am
EYW
-
BOS
9h 04m
1 stop
$202United Airlines
Sun, May 24 - Wed, May 27
Multiple Airlines Logo
5:34 am - 1:30 pm
BOS
-
EYW
7h 56m
1 stop
Multiple Airlines Logo
1:06 pm - 11:50 am
EYW
-
BOS
22h 44m
1 stop
$207Multiple Airlines
Mon, Feb 9 - Fri, Feb 13
Delta Logo
1:55 pm - 7:40 pm
BOS
-
EYW
5h 45m
1 stop
Delta Logo
6:00 pm - 1:03 am
EYW
-
BOS
7h 03m
1 stop
$217Delta
Sat, May 2 - Thu, May 7
United Airlines Logo
5:45 am - 3:17 pm
BOS
-
EYW
9h 32m
2 stops
United Airlines Logo
6:05 pm - 11:49 pm
EYW
-
BOS
5h 44m
1 stop
$222United Airlines
Thu, Feb 5 - Tue, Feb 10

Spirit Airlines flights from Boston to Florida Keys

Our best Spirit Airlines deals on Boston to Florida Keys flight tickets
Spirit Airlines
Feb 21
BOS5:50 pmBoston Logan Intl
3h 42m
MIA9:32 pmMiami
Mar 4
MIA1:21 pmMiami
3h 24m
BOS4:45 pmBoston Logan Intl
$84
Spirit Airlines
Feb 19
BOS3:54 pmBoston Logan Intl
3h 38m
MIA7:32 pmMiami
Mar 5
MIA1:21 pmMiami
3h 24m
BOS4:45 pmBoston Logan Intl
$85
Spirit Airlines
Feb 1
BOS5:53 pmBoston Logan Intl
3h 42m
MIA9:35 pmMiami
Feb 6
MIA12:55 pmMiami
3h 23m
BOS4:18 pmBoston Logan Intl
$87

Frontier flights from Boston to Florida Keys

Our best Frontier deals on Boston to Florida Keys flight tickets
Frontier
Feb 10
BOS6:00 amBoston Logan Intl
10h 46m
1 stop
MIA4:46 pmMiami
Feb 24
MIA6:57 pmMiami
6h 16m
1 stop
BOS1:13 amBoston Logan Intl
$128
Frontier
Jan 30
BOS6:00 amBoston Logan Intl
11h 48m
1 stop
MIA5:48 pmMiami
Feb 4
MIA1:21 pmMiami
11h 42m
1 stop
BOS1:03 amBoston Logan Intl
$145
Frontier
Jan 29
BOS6:00 amBoston Logan Intl
18h 47m
1 stop
MIA12:47 amMiami
Feb 4
MIA1:21 pmMiami
11h 42m
1 stop
BOS1:03 amBoston Logan Intl
$146

momondo Fare Finder

 
Customize your flight search to find flights from Boston to Florida Keys 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 January 21, 2026.
Use the filters below to find and compare flights from Boston to Florida Keys that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonMiami

BOS - MIA

BOSMIA

Boston Logan Intl

Sat 2/21

5:50 pm-9:32 pm

Nonstop3h 42m

Miami

Tue 3/3

8:37 pm-11:59 pm

Nonstop3h 22m

$84

BostonMiami

BOS - MIA

BOSMIA

Boston Logan Intl

Thu 2/19

3:54 pm-7:32 pm

Nonstop3h 38m

Miami

Thu 3/5

1:21 pm-4:45 pm

Nonstop3h 24m

$85

BostonMiami

BOS - MIA

BOSMIA

Boston Logan Intl

Sun 2/1

5:53 pm-9:35 pm

Nonstop3h 42m

Miami

Fri 2/6

12:55 pm-4:18 pm

Nonstop3h 23m

$87

BostonMiami

BOS - MIA

BOSMIA

Boston Logan Intl

Fri 2/6

5:53 pm-9:35 pm

Nonstop3h 42m

Miami

Tue 3/3

8:37 pm-11:59 pm

Nonstop3h 22m

$89

BostonMiami

BOS - MIA

BOSMIA

Boston Logan Intl

Mon 3/9

3:54 pm-7:32 pm

Nonstop3h 38m

Miami

Fri 3/13

10:39 am-1:55 pm

Nonstop3h 16m

$90

BostonMiami

BOS - MIA

BOSMIA

Boston Logan Intl

Wed 2/4

5:53 pm-9:35 pm

Nonstop3h 42m

Miami

Tue 2/10

6:57 pm-1:13 am

1 stop6h 16m

$95

BostonKey West

BOS - EYW

BOSEYW

Boston Logan Intl

Sun 5/24

6:00 am-3:06 pm

2 stops9h 06m

Key West

Wed 5/27

4:05 pm-1:09 am

1 stop9h 04m

$202

BostonKey West

BOS - EYW

BOSEYW

Boston Logan Intl

Mon 2/9

5:34 am-1:30 pm

1 stop7h 56m

Key West

Fri 2/13

1:06 pm-11:50 am

1 stop22h 44m

$207

BostonKey West

BOS - EYW

BOSEYW

Boston Logan Intl

Sat 5/2

1:55 pm-7:40 pm

1 stop5h 45m

Key West

Thu 5/7

6:00 pm-1:03 am

1 stop7h 03m

$217

BostonKey West

BOS - EYW

BOSEYW

Boston Logan Intl

Thu 2/5

5:45 am-3:17 pm

2 stops9h 32m

Key West

Tue 2/10

6:05 pm-11:49 pm

1 stop5h 44m

$222

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 Florida Keys from

How to get the cheapest flight ticket from Boston to Florida Keys

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 Florida Keys?

The month of March is another great option to travel to Florida Keys, with average flight prices from Boston averaging around $214.

What is the cheapest day to depart on your flight to Florida Keys?

The cheapest day to depart from Boston to Florida Keys is on a Thursday when prices can be found for as low as $399. The most expensive day to fly to Florida Keys is Wednesday, with ticket prices averaging around $459.

What is the cheapest time of day to depart on your flight to Florida Keys?

According to our data, the cheapest time of day to fly to Florida Keys is in the evening. momondo users have found flights departing from Boston to Florida Keys in the evening for as low as $251. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights at noon are often more expensive with an average ticket price of $527.

What is the cheapest Boston Logan Intl to Florida Keys flight route?

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

How far in advance should I book a flight to Florida Keys?

You are more likely to see cheaper flights to Florida Keys from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to Florida Keys for around $253 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Florida Keys from Boston for as low as $188 on momondo.

What cabin class options are available on Boston Logan Intl to Florida Keys flights?

There are 3 cabin classes available to choose from on Boston Logan Intl to Florida Keys 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 Florida Keys flights?

No. A direct flight is the cheapest option for a flight between Boston to Florida Keys.

Cheap Boston to Florida Keys flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Florida Keys

Fastest flight time

3h 34m

Direct flights

Every day

Airports in Florida Keys

3 airports
The fastest flight from Boston to Florida Keys takes 3h 34m
Direct flights go from Boston to Florida Keys every day.
There are 3 airports in Florida Keys. From Boston there are direct flights to Key West (EYW), Miami (MIA).
Search flight deals

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

    Prices for flights from Boston Logan Intl Airport to Florida Keys were last updated today.

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

  • How old do you have to be to fly from Boston Logan Intl Airport to Florida Keys?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Boston Logan Intl Airport to Florida Keys.

  • What documentation or ID do you need to fly to Florida Keys?

    The travel and health documents required for your trip to Florida Keys can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Florida Keys. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Boston to Florida Keys?

Best airlines flying from Boston to Florida Keys

Compare and see reviews for airlines that fly from Boston to Florida Keys with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $83Free CancellationRating
6.3
8,364 reviews
Search Spirit Airlines flights
United AirlinesPriceFrom $135Free CancellationRating
7.4
9,191 reviews
Search United Airlines flights
DeltaPriceFrom $168Free CancellationRating
7.9
8,089 reviews
Search Delta flights
JetBluePriceFrom $238Free CancellationRating
7.2
2,890 reviews
Search JetBlue flights
American AirlinesPriceFrom $247Free CancellationRating
7.2
11,174 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Boston to Florida Keys?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Florida Keys from Boston.

Can I find flights from Boston to Florida Keys with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Florida Keys from Boston with this policy.

How can momondo help me find flights from Boston to Florida Keys?

Once you have performed a search for Boston to Florida Keys flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are not ready to book a flight from Boston to Florida Keys now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Florida Keys and let you know when they change.

An easier way to manage your Florida Keys trip

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