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Cheap flights from Boston to San Juan 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 Boston to San Juan departing on 2/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

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Spirit Airlines Logo
3:18 pm - 8:24 pm
BOS
-
SJU
4h 06mnonstop
Spirit Airlines Logo
10:52 am - 2:12 pm
SJU
-
BOS
4h 20mnonstop
$140Spirit Airlines
Sat, Jan 31 - Tue, Feb 3
Spirit Airlines Logo
3:18 pm - 8:24 pm
BOS
-
SJU
4h 06mnonstop
Spirit Airlines Logo
6:00 am - 2:38 pm
SJU
-
BOS
9h 38m
1 stop
$141Spirit Airlines
Sat, Jan 31 - Wed, Feb 4
Spirit Airlines Logo
3:43 pm - 11:33 pm
BOS
-
SJU
6h 50m
1 stop
Spirit Airlines Logo
10:52 am - 2:12 pm
SJU
-
BOS
4h 20mnonstop
$142Spirit Airlines
Wed, Jan 28 - Thu, Feb 5
Spirit Airlines Logo
3:43 pm - 11:33 pm
BOS
-
SJU
6h 50m
1 stop
Spirit Airlines Logo
10:52 am - 2:12 pm
SJU
-
BOS
4h 20mnonstop
$143Spirit Airlines
Sat, Jan 31 - Wed, Feb 4
Spirit Airlines Logo
3:43 pm - 9:47 am
BOS
-
SJU
17h 04m
1 stop
Spirit Airlines Logo
10:52 am - 2:12 pm
SJU
-
BOS
4h 20mnonstop
$144Spirit Airlines
Sat, Jan 31 - Sat, Feb 7
Spirit Airlines Logo
3:18 pm - 8:24 pm
BOS
-
SJU
4h 06mnonstop
Spirit Airlines Logo
4:40 pm - 11:57 pm
SJU
-
BOS
8h 17m
1 stop
$146Spirit Airlines
Mon, Feb 2 - Thu, Feb 5
Spirit Airlines Logo
3:18 pm - 8:24 pm
BOS
-
SJU
4h 06mnonstop
Spirit Airlines Logo
10:52 am - 2:12 pm
SJU
-
BOS
4h 20mnonstop
$147Spirit Airlines
Wed, Feb 4 - Wed, Feb 11
Spirit Airlines Logo
3:18 pm - 8:24 pm
BOS
-
SJU
4h 06mnonstop
Spirit Airlines Logo
4:40 pm - 11:57 pm
SJU
-
BOS
8h 17m
1 stop
$148Spirit Airlines
Mon, Feb 2 - Thu, Feb 5
Spirit Airlines Logo
3:43 pm - 11:33 pm
BOS
-
SJU
6h 50m
1 stop
Spirit Airlines Logo
10:52 am - 2:12 pm
SJU
-
BOS
4h 20mnonstop
$150Spirit Airlines
Wed, Jan 28 - Tue, Feb 3
Spirit Airlines Logo
3:18 pm - 8:24 pm
BOS
-
SJU
4h 06mnonstop
Spirit Airlines Logo
10:52 am - 2:12 pm
SJU
-
BOS
4h 20mnonstop
$151Spirit Airlines
Sat, Jan 31 - Sun, Feb 1

Spirit Airlines flights from Boston to San Juan

Our best Spirit Airlines deals on Boston to San Juan flight tickets
Spirit Airlines
Jan 31
BOS3:18 pmBoston Logan Intl
4h 06m
SJU8:24 pmSan Juan Luis Munoz Marin Intl
Feb 3
SJU10:52 amSan Juan Luis Munoz Marin Intl
4h 20m
BOS2:12 pmBoston Logan Intl
$140
Spirit Airlines
Jan 27
BOS3:43 pmBoston Logan Intl
6h 50m
1 stop
SJU11:33 pmSan Juan Luis Munoz Marin Intl
Feb 3
SJU10:52 amSan Juan Luis Munoz Marin Intl
4h 20m
BOS2:12 pmBoston Logan Intl
$141
Spirit Airlines
Jan 28
BOS3:43 pmBoston Logan Intl
6h 50m
1 stop
SJU11:33 pmSan Juan Luis Munoz Marin Intl
Feb 5
SJU10:52 amSan Juan Luis Munoz Marin Intl
4h 20m
BOS2:12 pmBoston Logan Intl
$142

Frontier flights from Boston to San Juan

Our best Frontier deals on Boston to San Juan flight tickets
Frontier
Feb 10
BOS6:00 amBoston Logan Intl
8h 06m
1 stop
SJU3:06 pmSan Juan Luis Munoz Marin Intl
Feb 14
SJU6:00 amSan Juan Luis Munoz Marin Intl
4h 19m
BOS9:19 amBoston Logan Intl
$156
Frontier
Feb 9
BOS6:00 amBoston Logan Intl
8h 12m
1 stop
SJU3:12 pmSan Juan Luis Munoz Marin Intl
Feb 14
SJU6:00 amSan Juan Luis Munoz Marin Intl
4h 19m
BOS9:19 amBoston Logan Intl
$160
Frontier
Feb 10
BOS6:00 amBoston Logan Intl
8h 06m
1 stop
SJU3:06 pmSan Juan Luis Munoz Marin Intl
Feb 12
SJU4:11 pmSan Juan Luis Munoz Marin Intl
10h 02m
1 stop
BOS1:13 amBoston Logan Intl
$178

momondo Fare Finder

 
Customize your flight search to find flights from Boston to San Juan 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 18, 2026.
Use the filters below to find and compare flights from Boston to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sat 1/31

3:18 pm-8:24 pm

Nonstop4h 06m

San Juan Luis Munoz Marin Intl

Tue 2/3

10:52 am-2:12 pm

Nonstop4h 20m

$140

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sat 1/31

3:18 pm-8:24 pm

Nonstop4h 06m

San Juan Luis Munoz Marin Intl

Wed 2/4

6:00 am-2:38 pm

1 stop9h 38m

$141

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Wed 1/28

3:43 pm-11:33 pm

1 stop6h 50m

San Juan Luis Munoz Marin Intl

Thu 2/5

10:52 am-2:12 pm

Nonstop4h 20m

$142

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sat 1/31

3:43 pm-11:33 pm

1 stop6h 50m

San Juan Luis Munoz Marin Intl

Wed 2/4

10:52 am-2:12 pm

Nonstop4h 20m

$143

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sat 1/31

3:43 pm-9:47 am

1 stop17h 04m

San Juan Luis Munoz Marin Intl

Sat 2/7

10:52 am-2:12 pm

Nonstop4h 20m

$144

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Mon 2/2

3:18 pm-8:24 pm

Nonstop4h 06m

San Juan Luis Munoz Marin Intl

Thu 2/5

4:40 pm-11:57 pm

1 stop8h 17m

$146

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Wed 2/4

3:18 pm-8:24 pm

Nonstop4h 06m

San Juan Luis Munoz Marin Intl

Wed 2/11

10:52 am-2:12 pm

Nonstop4h 20m

$147

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Mon 2/2

3:18 pm-8:24 pm

Nonstop4h 06m

San Juan Luis Munoz Marin Intl

Thu 2/5

4:40 pm-11:57 pm

1 stop8h 17m

$148

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Wed 1/28

3:43 pm-11:33 pm

1 stop6h 50m

San Juan Luis Munoz Marin Intl

Tue 2/3

10:52 am-2:12 pm

Nonstop4h 20m

$150

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sat 1/31

3:18 pm-8:24 pm

Nonstop4h 06m

San Juan Luis Munoz Marin Intl

Sun 2/1

10:52 am-2:12 pm

Nonstop4h 20m

$151

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 San Juan from

How to get the cheapest flight ticket from Boston to San Juan

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 San Juan?

If you’re not able to fly to San Juan in January, then March is your next best option. Flight prices from Boston to San Juan during March average around $264.

What is the cheapest day to depart on your flight to San Juan?

The cheapest day to depart from Boston to San Juan is on a Monday when prices can be found for as low as $300. The most expensive day to fly to San Juan is Friday, with ticket prices averaging around $338.

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

The cheapest time of day to fly to San Juan is in the afternoon when flights can be purchased for as low as $307. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $334 on average. Flights to San Juan from Boston at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Boston Logan Intl to San Juan flight route?

Fly from Boston Logan Intl to San Juan Luis Munoz Marin Intl for the best Boston Logan Intl - San Juan flight prices

How far in advance should I book a flight to San Juan?

You are more likely to see cheaper flights to San Juan from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan for around $304 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan from Boston for as low as $268 on momondo.

What cabin class options are available on Boston Logan Intl to San Juan flights?

There are 4 cabin classes available to choose from on Boston Logan Intl to San Juan flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap Boston to San Juan flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to San Juan

Fastest flight time

3h 56m

Direct flights

Every day

Airports in San Juan

2 airports
The fastest flight from Boston to San Juan takes 3h 56m
Direct flights go from Boston to San Juan every day.
There are 2 airports in San Juan. From Boston there are direct flights to San Juan Luis Munoz Marin Intl (SJU).
Search flight deals

  • How far is Boston Logan Intl to San Juan by plane?

    San Juan is 1675.2 mi away from Boston Logan Intl. By plane, this route typically takes 3h 56m.

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

    Prices for flights from Boston Logan Intl Airport to San Juan were last updated today.

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

  • How old do you have to be to fly from Boston Logan Intl Airport to San Juan?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Boston Logan Intl Airport to San Juan.

  • What documentation or ID do you need to fly to San Juan?

    The travel and health documents required for your trip to San Juan 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 San Juan. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Boston to San Juan

Compare and see reviews for airlines that fly from Boston to San Juan with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $75Free CancellationRating
5.7
3,057 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $78Free CancellationRating
6.3
8,342 reviews
Search Spirit Airlines flights
JetBluePriceFrom $124Free CancellationRating
7.2
2,890 reviews
Search JetBlue flights
DeltaPriceFrom $136Free CancellationRating
7.9
8,074 reviews
Search Delta flights
United AirlinesPriceFrom $190Free CancellationRating
7.4
9,175 reviews
Search United Airlines flights
American AirlinesPriceFrom $242Free CancellationRating
7.2
11,157 reviews
Search American Airlines flights
SouthwestPriceFrom $383Free CancellationRating
8.0
4,261 reviews
Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Boston to San Juan?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Boston to San Juan. momondo saves you time and could save you money on your trip.

Can I find flights from Boston to San Juan with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Boston to San Juan flights to just show those with flexible booking policies.

How can momondo help me find flights from Boston to San Juan?

Once all potential Boston to San Juan 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 Boston to San Juan right now. Can momondo alert me if prices change?

Price alerts on flights to San Juan from Boston are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your San Juan trip

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Find better results for your trip to Puerto Rico

Fly into one of these airports located in San Juan

Airports listed have a maximum distance of 7.1 mi from San Juan
San Juan Isla Grande Airport
San Juan Luis Munoz Marin Intl Airport