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Cheap flights from Boston to San Juan from $123

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 4/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

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Spirit Airlines Logo
11:13 am - 4:07 pmBOS-SJU
3h 54mnonstop
Spirit Airlines Logo
5:27 pm - 8:34 pmSJU-BOS
4h 07mnonstop
$208Spirit Airlines
Find Deal
Fri, Jan 23 - Sat, Jan 31
Frontier Logo
10:18 am - 3:22 pmBOS-SJU
4h 04mnonstop
Frontier Logo
9:37 pm - 10:20 amSJU-BOS
13h 43m1 stop
$211Frontier
Find Deal
Sun, Jan 4 - Wed, Jan 14
Frontier Logo
11:47 am - 8:24 pmBOS-SJU
7h 37m1 stop
Frontier Logo
4:11 pm - 1:04 amSJU-BOS
9h 53m1 stop
$212Frontier
Find Deal
Sun, Jan 18 - Sat, Jan 24
Multiple Airlines Logo
11:13 am - 4:07 pmBOS-SJU
3h 54mnonstop
Multiple Airlines Logo
6:00 am - 9:23 amSJU-BOS
4h 23mnonstop
$213Multiple Airlines
Find Deal
Sun, Feb 8 - Sat, Feb 14
Spirit Airlines Logo
5:45 am - 10:59 pmBOS-SJU
16h 14m1 stop
Spirit Airlines Logo
12:10 pm - 10:08 pmSJU-BOS
10h 58m1 stop
$216Spirit Airlines
Find Deal
Sun, Feb 1 - Wed, Feb 4
Spirit Airlines Logo
5:45 am - 8:27 pmBOS-SJU
13h 42m1 stop
Spirit Airlines Logo
11:55 am - 11:53 pmSJU-BOS
12h 58m1 stop
$217Spirit Airlines
Find Deal
Thu, Nov 20 - Wed, Dec 3
JetBlue Logo
6:00 pm - 11:00 pmBOS-SJU
4h 00mnonstop
JetBlue Logo
6:15 am - 9:23 amSJU-BOS
4h 08mnonstop
$225JetBlue
Find Deal
Sat, Feb 28 - Fri, Mar 6
JetBlue Logo
1:55 pm - 6:57 pmBOS-SJU
4h 02mnonstop
JetBlue Logo
8:10 am - 11:23 amSJU-BOS
4h 13mnonstop
$226JetBlue
Find Deal
Wed, Nov 12 - Mon, Nov 17
Multiple Airlines Logo
11:13 am - 4:07 pmBOS-SJU
3h 54mnonstop
Multiple Airlines Logo
6:59 pm - 11:25 amSJU-BOS
17h 26m1 stop
$231Multiple Airlines
Find Deal
Thu, Jan 8 - Mon, Jan 12
Delta Logo
8:10 am - 1:10 pmBOS-SJU
4h 00mnonstop
Delta Logo
7:00 am - 5:15 pmSJU-BOS
11h 15m1 stop
$267Delta
Find Deal
Tue, Dec 2 - Thu, Dec 11

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
Jan 23
BOS11:13 amBoston Logan Intl
3h 54m
SJU4:07 pmSan Juan Luis Munoz Marin Intl
Jan 31
SJU5:27 pmSan Juan Luis Munoz Marin Intl
4h 07m
BOS8:34 pmBoston Logan Intl
$208
Find similar
Spirit Airlines
Feb 1
BOS5:45 amBoston Logan Intl
16h 14m
1 stop
SJU10:59 pmSan Juan Luis Munoz Marin Intl
Feb 4
SJU12:10 pmSan Juan Luis Munoz Marin Intl
10h 58m
1 stop
BOS10:08 pmBoston Logan Intl
$216
Find similar
Spirit Airlines
Nov 20
BOS5:45 amBoston Logan Intl
13h 42m
1 stop
SJU8:27 pmSan Juan Luis Munoz Marin Intl
Dec 3
SJU11:55 amSan Juan Luis Munoz Marin Intl
12h 58m
1 stop
BOS11:53 pmBoston Logan Intl
$217
Find similar

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
Jan 4
BOS10:18 amBoston Logan Intl
4h 04m
SJU3:22 pmSan Juan Luis Munoz Marin Intl
Jan 14
SJU9:37 pmSan Juan Luis Munoz Marin Intl
13h 43m
1 stop
BOS10:20 amBoston Logan Intl
$211
Find similar
Frontier
Jan 18
BOS11:47 amBoston Logan Intl
7h 37m
1 stop
SJU8:24 pmSan Juan Luis Munoz Marin Intl
Jan 24
SJU4:11 pmSan Juan Luis Munoz Marin Intl
9h 53m
1 stop
BOS1:04 amBoston Logan Intl
$212
Find similar
Frontier
Feb 19
BOS6:00 amBoston Logan Intl
19h 50m
2 stops
SJU2:50 amSan Juan Luis Munoz Marin Intl
Feb 26
SJU6:00 amSan Juan Luis Munoz Marin Intl
4h 23m
BOS9:23 amBoston Logan Intl
$223
Find similar

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 October 23, 2025.
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

Fri 1/23

11:13 am-4:07 pm

Nonstop3h 54m

San Juan Luis Munoz Marin Intl

Sat 1/31

5:27 pm-8:34 pm

Nonstop4h 07m

$208

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 1/4

10:18 am-3:22 pm

Nonstop4h 04m

San Juan Luis Munoz Marin Intl

Wed 1/14

9:37 pm-10:20 am

1 stop13h 43m

$211

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 1/18

11:47 am-8:24 pm

1 stop7h 37m

San Juan Luis Munoz Marin Intl

Sat 1/24

4:11 pm-1:04 am

1 stop9h 53m

$212

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 2/8

11:13 am-4:07 pm

Nonstop3h 54m

San Juan Luis Munoz Marin Intl

Sat 2/14

6:00 am-9:23 am

Nonstop4h 23m

$213

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 2/1

5:45 am-10:59 pm

1 stop16h 14m

San Juan Luis Munoz Marin Intl

Wed 2/4

12:10 pm-10:08 pm

1 stop10h 58m

$216

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Thu 11/20

5:45 am-8:27 pm

1 stop13h 42m

San Juan Luis Munoz Marin Intl

Wed 12/3

11:55 am-11:53 pm

1 stop12h 58m

$217

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sat 2/28

6:00 pm-11:00 pm

Nonstop4h 00m

San Juan Luis Munoz Marin Intl

Fri 3/6

6:15 am-9:23 am

Nonstop4h 08m

$225

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Wed 11/12

1:55 pm-6:57 pm

Nonstop4h 02m

San Juan Luis Munoz Marin Intl

Mon 11/17

8:10 am-11:23 am

Nonstop4h 13m

$226

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Thu 1/8

11:13 am-4:07 pm

Nonstop3h 54m

San Juan Luis Munoz Marin Intl

Mon 1/12

6:59 pm-11:25 am

1 stop17h 26m

$231

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Tue 12/2

8:10 am-1:10 pm

Nonstop4h 00m

San Juan Luis Munoz Marin Intl

Thu 12/11

7:00 am-5:15 pm

1 stop11h 15m

$267

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 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 $294. 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 $340.

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 morning when flights can be purchased for as low as $313. Flights at noon are often more expensive with an average ticket price of $350.

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 $295 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 $247 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.

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

As of October 2025, prices for Boston to San Juan Luis Munoz Marin Intl Airport flights are approximately 67% 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

$168

Fastest flight time

3h 54m

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 $168. 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 $274.
The fastest flight from Boston to San Juan Luis Munoz Marin Intl Airport takes 3h 54m
Direct flights go from Boston to San Juan Luis Munoz Marin Intl Airport every day.
Search flight deals

  • 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 54m, 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 $85Free CancellationRating
5.8
3,128 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $101Free CancellationRating
6.3
8,098 reviews
Search Spirit Airlines flights
DeltaPriceFrom $144Free CancellationRating
7.9
7,981 reviews
Search Delta flights
JetBluePriceFrom $170Free CancellationRating
7.2
2,908 reviews
Search JetBlue flights
United AirlinesPriceFrom $190Free CancellationRating
7.4
8,991 reviews
Search United Airlines flights
American AirlinesPriceFrom $288Free CancellationRating
7.2
11,028 reviews
Search American Airlines flights
SouthwestPriceFrom $398Free CancellationRating
8.0
4,237 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 $144. Generally, Delta has 1 flight on this route every week with an average price of $330. 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 $170, round-trip. It should be noted that an average JetBlue flight deal for this route in this time was higher, at $357 round-trip. JetBlue operates 3 flights out of Boston into San Juan Luis Munoz Marin Intl Airport in an average week, so prices vary by time and availability. 2,908 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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