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San Juan

$124+ Cheap flights from Boston (BOS) to San Juan

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SJU
nov. 27 — déc. 41
jeu. 11/27
jeu. 12/4
1 adult, Economy
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Cheapflights Tip: The best prices from Boston Logan Intl to San Juan are usually found in January or March, booked 27 days in advance, depart on a Monday or Wednesday and return on a Saturday

Find flight deals from Boston to San Juan

Cheapest flights from Boston to San Juan
Explore the most affordable flight options available from Boston to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octobre 28, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/811:08 amBOS - SJU
1 stop12h 08mSpirit Airlines
ven. 12/1211:38 amSJU - BOS
1 stop8h 28mSpirit Airlines
Deal found 10/26$216
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/306:00 amBOS - SJU
2 stops42h 06mMultiple Airlines
mer. 1/73:15 pmSJU - BOS
Nonstop4h 24mMultiple Airlines
Deal found 10/26$220
This Trip.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/86:55 pmBOS - SJU
Nonstop3h 59mJetBlue
ven. 12/126:10 amSJU - BOS
Nonstop4h 09mJetBlue
Deal found 10/26$223
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 12/316:00 amBOS - SJU
1 stop16h 54mMultiple Airlines
mer. 1/73:15 pmSJU - BOS
Nonstop4h 24mMultiple Airlines
Deal found 10/26$224
This Cheapflightsfares deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 11/136:16 amBOS - SJU
1 stop10h 03mSpirit Airlines
jeu. 11/2011:55 amSJU - BOS
1 stop12h 58mSpirit Airlines
Deal found 10/27$227
This Trip.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 11/166:55 pmBOS - SJU
Nonstop3h 59mJetBlue
jeu. 11/209:25 pmSJU - BOS
Nonstop4h 05mJetBlue
Deal found 10/27$228
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 12/68:11 pmBOS - SJU
1 stop13h 22mSpirit Airlines
jeu. 12/1111:38 amSJU - BOS
1 stop8h 28mSpirit Airlines
Deal found 10/26$230
This Trip.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/101:55 pmBOS - SJU
Nonstop4h 02mJetBlue
mar. 11/188:10 amSJU - BOS
Nonstop4h 13mJetBlue
Deal found 10/27$241

Cheap flight deals from Boston to San Juan

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to San Juan (PR1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated octobre 28, 2025.

Most accurate provider

Expedia
2 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$209
(Frontier)

One-way from

$124
(American Airlines)

Popular in

December

Cheapest in

January

Average price

$265
Provider with most accurate pricing for Boston Logan Intl-San Juan flight deals.
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Provider most trusted by Cheapflights users for Boston Logan Intl-San Juan flights.
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From Boston Logan Intl to San Juan
Search Deals
One-way flight from Boston Logan Intl to San Juan
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High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated octobre 28, 2025.
Use the filters below to find and compare flights from Boston to San Juan that are best for you.

Fly from

Boston

Fly to

San Juan

Route

Depart

Return

Price

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

jeu. 1/15

8:20 pm-1:22 am

Nonstop4h 02m

San Juan Luis Munoz Marin Intl

ven. 1/30

4:14 pm-7:28 pm

Nonstop4h 14m

$262

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

lun. 11/17

8:10 am-1:15 pm

Nonstop4h 05m

San Juan Luis Munoz Marin Intl

jeu. 11/20

2:27 pm-5:49 pm

Nonstop4h 22m

$262

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

jeu. 11/13

8:10 am-1:17 pm

Nonstop4h 07m

San Juan Luis Munoz Marin Intl

jeu. 11/20

2:27 pm-5:49 pm

Nonstop4h 22m

$262

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

dim. 1/18

1:00 pm-6:02 pm

Nonstop4h 02m

San Juan Luis Munoz Marin Intl

sam. 1/31

6:15 am-9:26 am

Nonstop4h 11m

$262

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

mer. 11/12

8:10 am-1:17 pm

Nonstop4h 07m

San Juan Luis Munoz Marin Intl

mar. 11/18

2:27 pm-5:49 pm

Nonstop4h 22m

$262

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

jeu. 1/15

7:30 am-12:33 pm

Nonstop4h 03m

San Juan Luis Munoz Marin Intl

jeu. 1/29

2:00 pm-5:13 pm

Nonstop4h 13m

$262

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

mer. 12/31

7:55 pm-12:59 am

Nonstop4h 04m

San Juan Luis Munoz Marin Intl

lun. 1/5

3:45 pm-11:52 pm

1 stop9h 07m

$269

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

mar. 1/20

5:29 am-2:10 pm

1 stop7h 41m

San Juan Luis Munoz Marin Intl

ven. 1/23

6:15 am-5:32 pm

1 stop12h 17m

$271

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

jeu. 1/15

5:00 pm-2:33 am

1 stop8h 33m

San Juan Luis Munoz Marin Intl

mar. 1/27

6:15 am-9:25 am

Nonstop4h 10m

$280

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

mer. 11/12

2:21 pm-10:22 pm

1 stop7h 01m

San Juan Luis Munoz Marin Intl

mar. 11/18

2:05 am-10:38 am

1 stop9h 33m

$281

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 20 results
1
2
  • Most accurate provider: When it comes to deals on Boston-San Juan flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Boston-San Juan flight deals on Cheapflights vs. Expedia 90-95% of the time. Price accuracy is based on data collected from Boston-San Juan flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-San Juan flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-San Juan flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Boston to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from Boston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boston to San Juan

How far ahead should I book a flight from Boston to San Juan?

Use this chart to determine the optimal time to book a round-trip flight from Boston to San Juan. Price data was last updated on October 24, 2025.

The best time to book flights from Boston to San Juan is 27 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Boston to San Juan?

Currently, February is the cheapest month in which you can book a flight from Boston to San Juan (average of $65). Flying from Boston to San Juan in September is currently the most expensive (average of $147). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BOS to SJU?

Find hourly flight availability from Boston to San Juan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated octobre 28, 2025.

A simple way to save on the total cost of your ticket is to fly from Boston to San Juan in the afternoon. If you’re flexible enough to do this you can expect to save up to 50% on your trip compared to booking a flight in the evening.

What is the cheapest day to fly from Boston to San Juan?

Use this chart to determine the cheapest time to fly round-trip from Boston to San Juan. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Boston to San Juan flight should consider departing on Thursday mornings when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Boston to San Juan?

Reviews of airlines servicing San Juan

Get insights into the airlines that provide service to San Juan. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Juan. Reviews last updated octobre 28, 2025.
Get a feel of what it's like to fly with Delta, American Airlines, and JetBlue from Boston to San Juan by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,994 reviews

Overall

7.9

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,994 reviews
Delta
7.9
Good
7,994 reviews

Overall

7.9

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,032 reviews
Delta
7.9
Good
7,994 reviews

Overall

7.9

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
JetBlue
7.2
Good
2,908 reviews
Delta
7.9
Good
7,994 reviews

Overall

7.9

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Spirit Airlines
6.3
Okay
8,116 reviews
Delta
7.9
Good
7,994 reviews

Overall

7.9

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Frontier
5.8
Fair
3,124 reviews
Delta
7.9
Good
7,994 reviews

Overall

7.9

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

Find useful and relevant information for your journey from Boston to San Juan. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Boston to San Juan?

    If you book a flight to San Juan from Boston, you will be flying from Logan Intl, which is the city’s only airport. Boston Logan Intl (BOS) is located 2.6 mi from the center of Boston. There are 5 flights from Logan Intl to San Juan per day from 7 different airlines.

  • How long is the flight from Boston to San Juan?

    JetBlue and Delta can get you from Boston to San Juan in just under 4h 02m. Your travel time will be generally consistent. Boston and San Juan are separated by a distance of 1678 mi. Generally, flights for this route are nonstop.

  • What are the cheapest airlines flying from Boston to San Juan round-trip?

    According to our current data, Frontier ($59), Spirit Airlines ($101), and Delta ($143) offers the cheapest pricing from Boston to San Juan. You may be able to fly from Boston to San Juan for 80% less than the average price by searching for these airlines.

  • What are the most reliable airlines from Boston to San Juan?

    The top 3 most reliable airlines when flying from Boston to San Juan are Hawaiian Airlines (73%), Delta (71%) and Icelandair (70%).

  • What are the cheapest flights from Boston to San Juan?

    The cheapest flight price from Boston to San Juan is $123. On average you can expect to pay $297. The most popular route, (Boston Logan Intl - San Juan Luis Munoz Marin Intl), can usually be booked for $168.

  • Can I find deals for flights from Boston to San Juan that include hotel bookings?

    Yes. In addition to deals on Boston to San Juan flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to San Juan?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to San Juan.

  • Can I find deals for business class flights from Boston to San Juan?

    Yes. Cheapflights offers flight deals from Boston to San Juan by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boston to San Juan?

    Currently, February is the cheapest month in which you can book a flight from Boston to San Juan (average of $65). Flying from Boston to San Juan in September is currently the most expensive (average of $147). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 7 airlines flying from Boston to San Juan

Discover the top 7 airlines that operate flights from Boston to San Juan. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated octobre 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$59Average$207FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$101Average$271FlexibilityNo cancel feeOn-time65%
DeltaCheapest$143Average$329FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$171Average$527FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$190Average$398FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$288Average$482FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$398Average$628FlexibilityNo cancel feeOn-time63%

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