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Cheap flights from Florida Keys to Boston from $70

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Florida Keys to Boston departing on 1/21. 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
12:56 pm - 4:19 pm
MIA
-
BOS
3h 23mnonstop
Spirit Airlines Logo
3:43 pm - 3:18 pm
BOS
-
MIA
23h 35m2 stops
$107Spirit Airlines
Wed, Jan 14 - Tue, Jan 20
Spirit Airlines Logo
12:56 pm - 4:19 pm
MIA
-
BOS
3h 23mnonstop
Spirit Airlines Logo
3:43 pm - 3:18 pm
BOS
-
MIA
23h 35m2 stops
$108Spirit Airlines
Wed, Jan 14 - Tue, Jan 20
Spirit Airlines Logo
12:56 pm - 4:19 pm
MIA
-
BOS
3h 23mnonstop
Spirit Airlines Logo
5:23 pm - 9:05 pm
BOS
-
MIA
3h 42mnonstop
$109Spirit Airlines
Sat, Jan 10 - Mon, Jan 12
Spirit Airlines Logo
10:39 am - 1:55 pm
MIA
-
BOS
3h 16mnonstop
Spirit Airlines Logo
6:00 am - 9:34 am
BOS
-
MIA
3h 34mnonstop
$112Spirit Airlines
Fri, Mar 13 - Mon, Mar 16
Multiple Airlines Logo
1:01 pm - 1:13 am
MIA
-
BOS
12h 12m2 stops
Multiple Airlines Logo
5:23 pm - 9:05 pm
BOS
-
MIA
3h 42mnonstop
$113Multiple Airlines
Wed, Jan 14 - Wed, Jan 21
Multiple Airlines Logo
12:56 pm - 4:19 pm
MIA
-
BOS
3h 23mnonstop
Multiple Airlines Logo
6:00 am - 7:46 pm
BOS
-
MIA
13h 46m2 stops
$114Multiple Airlines
Thu, Jan 22 - Mon, Jan 26
Spirit Airlines Logo
7:00 am - 11:57 pm
MIA
-
BOS
16h 57m2 stops
Spirit Airlines Logo
5:23 pm - 9:05 pm
BOS
-
MIA
3h 42mnonstop
$115Spirit Airlines
Thu, Jan 22 - Mon, Jan 26
JetBlue Logo
1:00 pm - 4:36 pm
EYW
-
BOS
3h 36mnonstop
JetBlue Logo
8:09 am - 12:05 pm
BOS
-
EYW
3h 56mnonstop
$162JetBlue
Mon, Jan 19 - Mon, Jan 26
JetBlue Logo
1:00 pm - 4:36 pm
EYW
-
BOS
3h 36mnonstop
JetBlue Logo
8:09 am - 12:05 pm
BOS
-
EYW
3h 56mnonstop
$182JetBlue
Mon, Jan 19 - Mon, Jan 26
Delta Logo
6:06 pm - 1:04 am
EYW
-
BOS
6h 58m1 stop
Delta Logo
6:00 am - 12:48 pm
BOS
-
EYW
6h 48m1 stop
$217Delta
Wed, Jan 28 - Tue, Feb 3

American Airlines flights from Florida Keys to Boston

Our best American Airlines deals on Florida Keys to Boston flight tickets
American Airlines
Dec 29
EYW3:25 pmKey West
3h 34m
BOS6:59 pmBoston Logan Intl
Jan 5
BOS10:44 amBoston Logan Intl
4h 11m
EYW2:55 pmKey West
$217
Find similar
American Airlines
Dec 29
EYW8:09 pmKey West
4h 50m
1 stop
BOS12:59 amBoston Logan Intl
Jan 5
BOS10:44 amBoston Logan Intl
4h 11m
EYW2:55 pmKey West
$249
Find similar
American Airlines
Jan 6
EYW7:45 pmKey West
5h 14m
1 stop
BOS12:59 amBoston Logan Intl
Jan 10
BOS8:15 amBoston Logan Intl
4h 17m
EYW12:32 pmKey West
$257
Find similar

United Airlines flights from Florida Keys to Boston

Our best United Airlines deals on Florida Keys to Boston flight tickets
United Airlines
Jan 15
EYW6:05 pmKey West
5h 44m
1 stop
BOS11:49 pmBoston Logan Intl
Jan 19
BOS9:30 amBoston Logan Intl
6h 52m
1 stop
EYW4:22 pmKey West
$277
Find similar
United Airlines
Jan 15
EYW2:25 pmKey West
9h 24m
2 stops
BOS11:49 pmBoston Logan Intl
Jan 19
BOS6:00 amBoston Logan Intl
7h 03m
1 stop
EYW1:03 pmKey West
$282
Find similar
United Airlines
Jan 15
EYW2:25 pmKey West
9h 24m
2 stops
BOS11:49 pmBoston Logan Intl
Jan 19
BOS5:45 amBoston Logan Intl
9h 32m
2 stops
EYW3:17 pmKey West
$287
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Florida Keys to Boston 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 December 23, 2025.
Use the filters below to find and compare flights from Florida Keys to Boston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

MiamiBoston

MIA - BOS

MIABOS

Miami

Wed 1/14

12:56 pm-4:19 pm

Nonstop3h 23m

Boston Logan Intl

Tue 1/20

3:43 pm-3:18 pm

2 stops23h 35m

$107

MiamiBoston

MIA - BOS

MIABOS

Miami

Wed 1/14

12:56 pm-4:19 pm

Nonstop3h 23m

Boston Logan Intl

Tue 1/20

3:43 pm-3:18 pm

2 stops23h 35m

$108

MiamiBoston

MIA - BOS

MIABOS

Miami

Sat 1/10

12:56 pm-4:19 pm

Nonstop3h 23m

Boston Logan Intl

Mon 1/12

5:23 pm-9:05 pm

Nonstop3h 42m

$109

MiamiBoston

MIA - BOS

MIABOS

Miami

Fri 3/13

10:39 am-1:55 pm

Nonstop3h 16m

Boston Logan Intl

Mon 3/16

6:00 am-9:34 am

Nonstop3h 34m

$112

MiamiBoston

MIA - BOS

MIABOS

Miami

Wed 1/14

1:01 pm-1:13 am

2 stops12h 12m

Boston Logan Intl

Wed 1/21

5:23 pm-9:05 pm

Nonstop3h 42m

$113

MiamiBoston

MIA - BOS

MIABOS

Miami

Thu 1/22

12:56 pm-4:19 pm

Nonstop3h 23m

Boston Logan Intl

Mon 1/26

6:00 am-7:46 pm

2 stops13h 46m

$114

MiamiBoston

MIA - BOS

MIABOS

Miami

Thu 1/22

7:00 am-11:57 pm

2 stops16h 57m

Boston Logan Intl

Mon 1/26

5:23 pm-9:05 pm

Nonstop3h 42m

$115

Key WestBoston

EYW - BOS

EYWBOS

Key West

Mon 1/19

1:00 pm-4:36 pm

Nonstop3h 36m

Boston Logan Intl

Mon 1/26

8:09 am-12:05 pm

Nonstop3h 56m

$162

Key WestBoston

EYW - BOS

EYWBOS

Key West

Mon 1/19

1:00 pm-4:36 pm

Nonstop3h 36m

Boston Logan Intl

Mon 1/26

8:09 am-12:05 pm

Nonstop3h 56m

$182

Key WestBoston

EYW - BOS

EYWBOS

Key West

Wed 1/28

6:06 pm-1:04 am

1 stop6h 58m

Boston Logan Intl

Tue 2/3

6:00 am-12:48 pm

1 stop6h 48m

$217

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 Boston from

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

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 Boston?

In general, January is the cheapest month to fly from Florida Keys to Boston. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $136. If you aren’t able to travel during the month of January, then book flights to Boston from Florida Keys during March instead. Flights to Boston in March, while not as cheap as those in January, still average around $167.

What is the cheapest day to depart on your flight to Boston?

The cheapest day to depart from Florida Keys to Boston is on a Thursday when prices can be found for as low as $206. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Boston on Monday is $354.

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

According to our data, the cheapest time of day to fly to Boston is at noon. momondo users have found flights departing from Florida Keys to Boston at noon for as low as $163. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the afternoon is when there is more demand to fly to Boston, so prices are often more expensive at around $368 per ticket.

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

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

How far in advance should I book a flight to Boston?

You are more likely to see cheaper flights to Boston from Florida Keys when booking weeks ahead of your departure date. In general, you can expect to find flights to Boston for around $202 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Boston from Florida Keys for as low as $162 on momondo.

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

There is only 1 cabin class available to choose from on Florida Keys to Boston Logan Intl 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 Florida Keys to Boston flights?

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

Cheap Florida Keys to Boston flight deals and tips

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

Fastest flight time

3h 15m

Direct flights

Every day

Airports in Boston

1 airport
The fastest flight from Florida Keys to Boston takes 3h 15m
Direct flights go from Florida Keys to Boston every day.
There is 1 airport in Boston. From Florida Keys there are direct flights to Boston Logan Intl (BOS).
Search flight deals

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

    Prices for flights from Florida Keys to Boston Logan Intl Airport refresh daily.

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

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

    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 Florida Keys to Boston Logan Intl Airport.

  • What documentation or ID do you need to fly to Boston Logan Intl Airport?

    The necessary travel and health documents for your Boston Logan Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from Florida Keys to Boston

Compare and see reviews for airlines that fly from Florida Keys to Boston with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $182Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights
JetBluePriceFrom $277Free CancellationRating
7.2
2,898 reviews
Search JetBlue flights

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Hampton Beach
Salem
Ogunquit
Old Orchard Beach
Hampton
York Beach
Plymouth
Kennebunkport
South Yarmouth
Cambridge
Narragansett
Gloucester
Nashua
Falmouth
Laconia
Brockton
Concord
Sturbridge
Everett
Warwick

Why use momondo?

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

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 Florida Keys to Boston for you.

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

Flights from Florida Keys to Boston with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential Florida Keys to Boston flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Florida Keys to Boston flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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