Cheap flights from Boston to San Juan from $69

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 3/5. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Spirit Airlines Logo
5:27 am - 3:31 pm
BOS
-
SJU
9h 04m
1 stop
Spirit Airlines Logo
5:00 am - 11:48 am
SJU
-
BOS
6h 48m
1 stop
$143Spirit Airlines
Tue, Mar 3 - Tue, Mar 10
Spirit Airlines Logo
8:01 pm - 1:08 am
BOS
-
SJU
4h 07mnonstop
Spirit Airlines Logo
11:52 am - 11:59 pm
SJU
-
BOS
13h 07m
1 stop
$145Spirit Airlines
Sun, Mar 1 - Thu, Mar 5
Spirit Airlines Logo
5:27 am - 3:31 pm
BOS
-
SJU
9h 04m
1 stop
Spirit Airlines Logo
11:52 am - 11:59 pm
SJU
-
BOS
13h 07m
1 stop
$146Spirit Airlines
Wed, Feb 25 - Thu, Feb 26
Spirit Airlines Logo
8:01 pm - 1:08 am
BOS
-
SJU
4h 07mnonstop
Spirit Airlines Logo
4:31 pm - 11:44 pm
SJU
-
BOS
8h 13m
1 stop
$147Spirit Airlines
Sat, Feb 28 - Tue, Mar 3
Spirit Airlines Logo
8:01 pm - 1:08 am
BOS
-
SJU
4h 07mnonstop
Spirit Airlines Logo
2:30 pm - 6:56 pm
SJU
-
BOS
4h 26mnonstop
$148Spirit Airlines
Fri, Mar 6 - Wed, Mar 11
Spirit Airlines Logo
8:01 pm - 1:08 am
BOS
-
SJU
4h 07mnonstop
Spirit Airlines Logo
4:36 pm - 11:44 pm
SJU
-
BOS
8h 08m
1 stop
$149Spirit Airlines
Mon, Feb 23 - Thu, Feb 26
Spirit Airlines Logo
4:22 pm - 10:17 am
BOS
-
SJU
16h 55m
1 stop
Spirit Airlines Logo
11:22 am - 2:43 pm
SJU
-
BOS
4h 21mnonstop
$150Spirit Airlines
Sun, Feb 22 - Thu, Feb 26
Frontier Logo
10:04 am - 3:00 pm
BOS
-
SJU
3h 56mnonstop
Frontier Logo
4:06 pm - 1:13 am
SJU
-
BOS
10h 07m
1 stop
$151Frontier
Mon, Feb 23 - Wed, Feb 25
Spirit Airlines Logo
3:00 pm - 8:06 pm
BOS
-
SJU
4h 06mnonstop
Spirit Airlines Logo
5:20 am - 11:37 am
SJU
-
BOS
7h 17m
1 stop
$152Spirit Airlines
Mon, Feb 16 - Wed, Feb 18
Multiple Airlines Logo
6:00 am - 3:06 pm
BOS
-
SJU
8h 06m
1 stop
Multiple Airlines Logo
3:30 pm - 6:56 pm
SJU
-
BOS
4h 26mnonstop
$153Multiple Airlines
Tue, Feb 24 - Tue, Mar 3

Spirit Airlines flights from Boston to San Juan Luis Munoz Marin Intl Airport

Our best Spirit Airlines deals on Boston to San Juan Luis Munoz Marin Intl Airport flight tickets
Spirit Airlines
Mar 3
BOS5:27 amBoston Logan Intl
9h 04m
1 stop
SJU3:31 pmSan Juan Luis Munoz Marin Intl
Mar 10
SJU5:00 amSan Juan Luis Munoz Marin Intl
6h 48m
1 stop
BOS11:48 amBoston Logan Intl
$143
Spirit Airlines
Feb 7
BOS3:18 pmBoston Logan Intl
4h 06m
SJU8:24 pmSan Juan Luis Munoz Marin Intl
Feb 14
SJU11:22 amSan Juan Luis Munoz Marin Intl
4h 21m
BOS2:43 pmBoston Logan Intl
$144
Spirit Airlines
Mar 1
BOS8:01 pmBoston Logan Intl
4h 07m
SJU1:08 amSan Juan Luis Munoz Marin Intl
Mar 5
SJU11:52 amSan Juan Luis Munoz Marin Intl
13h 07m
1 stop
BOS11:59 pmBoston Logan Intl
$145

Frontier flights from Boston to San Juan Luis Munoz Marin Intl Airport

Our best Frontier deals on Boston to San Juan Luis Munoz Marin Intl Airport flight tickets
Frontier
Feb 23
BOS10:04 amBoston Logan Intl
3h 56m
SJU3:00 pmSan Juan Luis Munoz Marin Intl
Feb 25
SJU4:06 pmSan Juan Luis Munoz Marin Intl
10h 07m
1 stop
BOS1:13 amBoston Logan Intl
$151
Frontier
Feb 10
BOS6:00 amBoston Logan Intl
8h 06m
1 stop
SJU3:06 pmSan Juan Luis Munoz Marin Intl
Feb 13
SJU6:00 amSan Juan Luis Munoz Marin Intl
4h 19m
BOS9:19 amBoston Logan Intl
$159
Frontier
Feb 23
BOS6:00 amBoston Logan Intl
8h 02m
1 stop
SJU3:02 pmSan Juan Luis Munoz Marin Intl
Feb 27
SJU6:00 amSan Juan Luis Munoz Marin Intl
4h 19m
BOS9:19 amBoston Logan Intl
$160

momondo Fare Finder

 
Customize your flight search to find flights from Boston to San Juan Luis Munoz Marin Intl Airport 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 February 2, 2026.
Use the filters below to find and compare flights from Boston to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Tue 3/3

5:27 am-3:31 pm

1 stop9h 04m

San Juan Luis Munoz Marin Intl

Tue 3/10

5:00 am-11:48 am

1 stop6h 48m

$143

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 3/1

8:01 pm-1:08 am

Nonstop4h 07m

San Juan Luis Munoz Marin Intl

Thu 3/5

11:52 am-11:59 pm

1 stop13h 07m

$145

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Wed 2/25

5:27 am-3:31 pm

1 stop9h 04m

San Juan Luis Munoz Marin Intl

Thu 2/26

11:52 am-11:59 pm

1 stop13h 07m

$146

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sat 2/28

8:01 pm-1:08 am

Nonstop4h 07m

San Juan Luis Munoz Marin Intl

Tue 3/3

4:31 pm-11:44 pm

1 stop8h 13m

$147

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Fri 3/6

8:01 pm-1:08 am

Nonstop4h 07m

San Juan Luis Munoz Marin Intl

Wed 3/11

2:30 pm-6:56 pm

Nonstop4h 26m

$148

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Mon 2/23

8:01 pm-1:08 am

Nonstop4h 07m

San Juan Luis Munoz Marin Intl

Thu 2/26

4:36 pm-11:44 pm

1 stop8h 08m

$149

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 2/22

4:22 pm-10:17 am

1 stop16h 55m

San Juan Luis Munoz Marin Intl

Thu 2/26

11:22 am-2:43 pm

Nonstop4h 21m

$150

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Mon 2/23

10:04 am-3:00 pm

Nonstop3h 56m

San Juan Luis Munoz Marin Intl

Wed 2/25

4:06 pm-1:13 am

1 stop10h 07m

$151

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Mon 2/16

3:00 pm-8:06 pm

Nonstop4h 06m

San Juan Luis Munoz Marin Intl

Wed 2/18

5:20 am-11:37 am

1 stop7h 17m

$152

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Tue 2/24

6:00 am-3:06 pm

1 stop8h 06m

San Juan Luis Munoz Marin Intl

Tue 3/3

3:30 pm-6:56 pm

Nonstop4h 26m

$153

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 Luis Munoz Marin Intl Airport

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 typical price of a round-trip flight between Boston and San Juan Luis Munoz Marin Intl Airport?

What is the cheapest month to fly to San Juan Luis Munoz Marin Intl Airport?

If you aren’t able to travel to San Juan Luis Munoz Marin Intl Airport during the month of January, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $264.

What is the cheapest day to depart on your flight to San Juan Luis Munoz Marin Intl Airport?

On average, the least expensive day to fly to San Juan Luis Munoz Marin Intl Airport from Boston is on a Monday. momondo users have found tickets for Monday departures for as low as $301. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Friday is the most expensive day to depart from Boston because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $341.

What is the cheapest time of day to depart on your flight to San Juan Luis Munoz Marin Intl Airport?

The cheapest time of day to fly to San Juan Luis Munoz Marin Intl Airport is in the afternoon when flights can be purchased for as low as $290. Flights at noon are often more expensive with an average ticket price of $334.

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

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

How far in advance should I book a flight to San Juan Luis Munoz Marin Intl Airport?

You are more likely to see cheaper flights to San Juan Luis Munoz Marin Intl Airport from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan Luis Munoz Marin Intl Airport for around $305 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan Luis Munoz Marin Intl Airport from Boston for as low as $270 on momondo.

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

There are 4 cabin classes available to choose from on Boston Logan Intl to San Juan Luis Munoz Marin 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 Boston to San Juan Luis Munoz Marin Intl Airport flights?

No. A direct flight is the cheapest option for a flight between Boston to San Juan Luis Munoz Marin Intl Airport.

How have Boston to San Juan Luis Munoz Marin Intl Airport flight prices changed over time?

As of February 2026, prices for Boston to San Juan Luis Munoz Marin Intl Airport flights are approximately 15% more expensive when compared to flights at the same time last year.

When to book flights from Boston to San Juan Luis Munoz Marin Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to San Juan Luis Munoz Marin Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Boston to San Juan Luis Munoz Marin Intl Airport (BOS to SJU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to San Juan Luis Munoz Marin Intl Airport

Best Price Found

$102

Fastest flight time

3h 56m

Direct flights

Every day
The best one-way flight to San Juan Luis Munoz Marin Intl Airport from Boston in the past 72 hours is $102. The best round-trip flight deal from Boston to San Juan Luis Munoz Marin Intl Airport found on momondo in the last 72 hours is $203.
The fastest flight from Boston to San Juan Luis Munoz Marin Intl Airport takes 3h 56m
Direct flights go from Boston to San Juan Luis Munoz Marin Intl Airport every day.
  • How far is Boston Logan Intl to San Juan Luis Munoz Marin Intl by plane?

    The distance between Boston Logan Intl and San Juan Luis Munoz Marin Intl is about 1678.1 mi. Flights usually cover this in 3h 56m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from Boston Logan Intl Airport to San Juan Luis Munoz Marin Intl Airport are updated daily.

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

  • How old do you have to be to fly from Boston Logan Intl Airport to San Juan Luis Munoz Marin 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 Boston Logan Intl Airport to San Juan Luis Munoz Marin Intl Airport.

  • What documentation or ID do you need to fly to San Juan Luis Munoz Marin Intl Airport?

    The necessary travel and health documents for your San Juan Luis Munoz Marin 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 Boston to San Juan Luis Munoz Marin Intl Airport?

  • What is the most popular airline from Boston to San Juan Luis Munoz Marin Intl Airport?

Best airlines flying from Boston to San Juan Luis Munoz Marin Intl Airport

Compare and see reviews for airlines that fly from Boston to San Juan Luis Munoz Marin Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $77Free CancellationRating
5.7
3,051 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $82Free CancellationRating
6.3
8,396 reviews
Search Spirit Airlines flights
DeltaPriceFrom $137Free CancellationRating
7.9
8,132 reviews
Search Delta flights
JetBluePriceFrom $140Free CancellationRating
7.2
2,892 reviews
Search JetBlue flights
United AirlinesPriceFrom $210Free CancellationRating
7.4
9,231 reviews
Search United Airlines flights
American AirlinesPriceFrom $242Free CancellationRating
7.2
11,212 reviews
Search American Airlines flights
SouthwestPriceFrom $383Free CancellationRating
8.0
4,271 reviews
Search Southwest flights
  • Delta Flights From Boston to San Juan Luis Munoz Marin Intl Airport

    The lowest priced Delta flight from Boston to San Juan Luis Munoz Marin Intl Airport from the last 72 hours was $137. Generally, Delta has 8 flights on this route every week with an average price of $320. Delta is rated 7.9/10 by our users.

  • JetBlue Flights From Boston to San Juan Luis Munoz Marin Intl Airport

    The best JetBlue deal for Boston to San Juan Luis Munoz Marin Intl Airport flight tickets found on momondo in the last 72 hours was $140, round-trip. It should be noted that an average JetBlue flight deal for this route in this time was higher, at $330 round-trip. JetBlue operates 12 flights out of Boston into San Juan Luis Munoz Marin Intl Airport in an average week, so prices vary by time and availability. 2,892 JetBlue reviews by users on momondo have scored the airline at 7.2/10.

Traveling to a place near San Juan?

Book flights to San Juan if you plan to visit one of these locations
Carolina
Fajardo
Dorado
Luquillo
Caguas
Humacao
Rio Grande
Bayamón

Why use momondo?

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

It is quick and easy to find Boston to San Juan flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Juan that suits you.

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

All flight searches from Boston to San Juan on momondo can be filtered to show those which offer 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?

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

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1 adult
Wed 3/4
Wed 3/11

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