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San Juan

$164+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SJU
Aug 22 — Aug 291
Sat 8/22
Sat 8/29
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 October, booked 68 days in advance, depart on a Monday or Sunday and return on a Tuesday

Cheap 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 July 23, 2026.

This American Airlines deal was found by Cheapflights users on 7/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/166:00 am
BOS
-
SJU
2 stops8h 50m
American Airlines
Wed 9/236:00 am
SJU
-
BOS
2 stops10h 55m
American Airlines
Deal found 7/23$291
This JetBlue deal was found by Cheapflights users on 7/22. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1911:20 am
BOS
-
SJU
Nonstop4h 09m
JetBlue
Wed 10/216:12 am
SJU
-
BOS
Nonstop4h 03m
JetBlue
Deal found 7/22$297
This Super.com deal was found by Cheapflights users on 7/21. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/137:50 pm
BOS
-
SJU
Nonstop4h 04m
JetBlue
Sat 9/126:00 am
SJU
-
BOS
Nonstop4h 03m
JetBlue
Deal found 7/21$299
This SmartFares deal was found by Cheapflights users on 7/21. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/87:20 pm
BOS
-
SJU
Nonstop4h 38m
JetBlue
Mon 10/126:12 am
SJU
-
BOS
Nonstop4h 03m
JetBlue
Deal found 7/21$300
This United Airlines deal was found by Cheapflights users on 7/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/197:05 am
BOS
-
SJU
2 stops13h 33m
United Airlines
Mon 9/211:00 am
SJU
-
BOS
2 stops9h 18m
United Airlines
Deal found 7/22$301
This Delta deal was found by Cheapflights users on 7/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/118:55 am
BOS
-
SJU
Nonstop4h 06m
Delta
Tue 10/131:06 pm
SJU
-
BOS
1 stop10h 02m
Delta
Deal found 7/22$302
This Cheapflightsfares deal was found by Cheapflights users on 7/22. 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.
Tue 10/277:25 pm
BOS
-
SJU
Nonstop4h 00m
JetBlue
Wed 11/47:00 am
SJU
-
BOS
Nonstop4h 13m
JetBlue
Deal found 7/22$303
This United Airlines deal was found by Cheapflights users on 7/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:00 am
BOS
-
SJU
1 stop7h 45m
United Airlines
Mon 10/267:25 am
SJU
-
BOS
2 stops10h 58m
United Airlines
Deal found 7/22$305
This JetBlue deal was found by Cheapflights users on 7/23. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/307:25 pm
BOS
-
SJU
Nonstop4h 00m
JetBlue
Fri 11/68:45 pm
SJU
-
BOS
Nonstop4h 05m
JetBlue
Deal found 7/23$306
This American Airlines deal was found by Cheapflights users on 7/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/107:42 am
BOS
-
SJU
1 stop7h 58m
American Airlines
Fri 9/112:58 pm
SJU
-
BOS
1 stop6h 55m
American Airlines
Deal found 7/21$307
This Kiwi.com deal was found by Cheapflights users on 7/21. 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.
Thu 10/229:15 am
BOS
-
SJU
1 stop8h 21m
Multiple Airlines
Fri 10/305:12 pm
SJU
-
BOS
1 stop16h 17m
Multiple Airlines
Deal found 7/21$308
This Super.com deal was found by Cheapflights users on 7/21. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:00 am
BOS
-
SJU
Nonstop4h 00m
JetBlue
Tue 9/156:00 am
SJU
-
BOS
Nonstop4h 03m
JetBlue
Deal found 7/21$309

Find 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 July 23, 2026.

Round-trip from

$291
(American Airlines)

One-way from

$164
(Super.com)

Popular in

July

Cheapest in

January

Average price

$447
From Boston Logan Intl to San Juan
Search Deals
One-way flight from Boston Logan Intl to San Juan
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($63 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
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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 July 23, 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

Cheapest round-trip

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Tue 8/25

6:00 am-1:45 pm

1 stop7h 45m

San Juan Luis Munoz Marin Intl

Tue 9/15

7:00 am-5:29 pm

1 stop10h 29m

$315

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Thu 8/27

5:45 am-12:54 pm

1 stop7h 09m

San Juan Luis Munoz Marin Intl

Sat 9/12

1:00 am-9:48 am

1 stop8h 48m

$315

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Fri 9/18

6:00 am-1:45 pm

1 stop7h 45m

San Juan Luis Munoz Marin Intl

Sat 9/19

1:00 am-10:18 am

2 stops9h 18m

$315
Quickest round-trip

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Wed 9/2

8:50 am-12:57 pm

Nonstop4h 07m

San Juan Luis Munoz Marin Intl

Sun 9/6

2:10 pm-6:21 pm

Nonstop4h 11m

$335

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Mon 8/17

6:00 am-1:45 pm

1 stop7h 45m

San Juan Luis Munoz Marin Intl

Tue 8/18

1:00 am-8:17 am

1 stop7h 17m

$344

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Thu 9/10

1:10 pm-11:50 pm

2 stops10h 40m

San Juan Luis Munoz Marin Intl

Fri 9/11

6:30 am-4:10 pm

2 stops9h 40m

$349

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Fri 8/28

8:50 am-12:57 pm

Nonstop4h 07m

San Juan Luis Munoz Marin Intl

Tue 9/1

2:10 pm-6:21 pm

Nonstop4h 11m

$349

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sat 8/29

8:50 am-12:57 pm

Nonstop4h 07m

San Juan Luis Munoz Marin Intl

Tue 9/1

2:10 pm-6:21 pm

Nonstop4h 11m

$349

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Mon 8/24

6:05 am-4:33 pm

1 stop10h 28m

San Juan Luis Munoz Marin Intl

Thu 8/27

2:10 pm-6:21 pm

Nonstop4h 11m

$354

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Tue 8/18

6:05 am-4:33 pm

1 stop10h 28m

San Juan Luis Munoz Marin Intl

Thu 8/20

2:10 pm-6:21 pm

Nonstop4h 11m

$354

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/21

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

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

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

Currently, January is the cheapest month in which you can book a flight from Boston to San Juan (average of $268). Flying from Boston to San Juan in July is currently the most expensive (average of $447). 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 July 23, 2026.

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 11% on your trip compared to booking a flight in the morning.

Weekly flight availability from Boston to San Juan

Explore weekly flight availability from Boston to San Juan. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 23, 2026.

The most flights from BOS to PR1 are scheduled on a Monday (11 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

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

Airfare is below average for this route at the moment.
Boston to San Juan flights typically cost between $330 and $490 in October.
The cheapest round-trip price found within the last 5 days was $290 on JetBlue (Oct 27-Oct 27).

How often are flights from Boston to San Juan delayed?

About 25% of weekly flights between Boston and San Juan have experienced delays in the past year, with the average delay time being 152 minutes.

What is the most punctual flight time for Boston to San Juan flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Boston to San Juan flights?

Over the last year, Delta have had the lowest number of delays on this route, with just 18% of flights being delayed.

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

The best time to book flights from Boston to San Juan is 46 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 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 July 18, 2026.

Travelers seeking maximum savings on their Boston to San Juan flight should consider departing on Wednesday evenings 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.

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 July 23, 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andAmerican Airlines 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
7.8
Good
8,479 reviews

Food

7.2

Crew

8.5

Overall

7.8

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Cidalia,Aug 2023

BOS - MIA

I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours
Delta
7.8
Good
8,479 reviews
Delta
7.8
Good
8,479 reviews

Food

7.2

Crew

8.5

Overall

7.8

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Cidalia,Aug 2023

BOS - MIA

I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours
United Airlines
7.4
Good
10,024 reviews
Delta
7.8
Good
8,479 reviews

Food

7.2

Crew

8.5

Overall

7.8

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Cidalia,Aug 2023

BOS - MIA

I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours
American Airlines
7.1
Good
11,832 reviews
Delta
7.8
Good
8,479 reviews

Food

7.2

Crew

8.5

Overall

7.8

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Cidalia,Aug 2023

BOS - MIA

I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours
JetBlue
7.1
Good
3,020 reviews
Delta
7.8
Good
8,479 reviews

Food

7.2

Crew

8.5

Overall

7.8

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Cidalia,Aug 2023

BOS - MIA

I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours
Frontier
5.6
Fair
2,770 reviews
Delta
7.8
Good
8,479 reviews

Food

7.2

Crew

8.5

Overall

7.8

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Cidalia,Aug 2023

BOS - MIA

I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours

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 6 flights from Logan Intl to San Juan per day from 6 different airlines.

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

    United Airlines and Delta can get you from Boston to San Juan in just under 4h 07m. Your travel time can differ by up to 3h 38m. Boston and San Juan are separated by a distance of 1678 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    According to our current data, Frontier ($85), Delta ($148), and JetBlue ($164) offers the cheapest pricing from Boston to San Juan. You may be able to fly from Boston to San Juan for 75% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Boston to San Juan one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $61. However, be on the lookout for offers from JetBlue and Delta, as they are both options that can get you from Boston to San Juan for a low price.

  • 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 EL AL (83%), Delta (82%) and TAP AIR PORTUGAL (73%).

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

    The cheapest flight price from Boston to San Juan is $164. On average you can expect to pay $365. The most popular route, (Boston Logan Intl - San Juan Luis Munoz Marin Intl), can usually be booked for $260.

  • 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, January is the cheapest month in which you can book a flight from Boston to San Juan (average of $268). Flying from Boston to San Juan in July is currently the most expensive (average of $447). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 6 airlines flying from Boston to San Juan

Discover the top 6 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 July 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$85Average$285FlexibilityNo cancel feeOn-time62%
DeltaCheapest$148Average$379FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$164Average$568FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$212Average$398FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$242Average$449FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$313Average$399FlexibilityNo cancel feeOn-time63%

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