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San Juan

$72+ 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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SJU
Mar 23 — Mar 301
Mon 3/23
Mon 3/30
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 May, booked 47 days in advance, depart on a Wednesday or Monday and return on a Friday

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 February 21, 2026.

This eDestinos deal was found by Cheapflights users on 2/20. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/23:00 pm
BOS
-
SJU
Nonstop4h 06m
Spirit Airlines
Fri 3/611:22 am
SJU
-
BOS
Nonstop4h 21m
Spirit Airlines
Deal found 2/20$142
This Travelocity deal was found by Cheapflights users on 2/17. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/18:01 pm
BOS
-
SJU
Nonstop4h 07m
Spirit Airlines
Tue 3/33:30 pm
SJU
-
BOS
Nonstop4h 26m
Spirit Airlines
Deal found 2/17$143
This Kiwi.com deal was found by Cheapflights users on 2/17. 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.
Sun 3/18:01 pm
BOS
-
SJU
Nonstop4h 07m
Spirit Airlines
Thu 3/511:22 am
SJU
-
BOS
Nonstop4h 21m
Spirit Airlines
Deal found 2/17$144
This Kiwi.com deal was found by Cheapflights users on 2/19. 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.
Tue 3/33:00 pm
BOS
-
SJU
Nonstop4h 06m
Multiple Airlines
Thu 3/56:00 am
SJU
-
BOS
Nonstop4h 19m
Multiple Airlines
Deal found 2/19$145
This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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.
Mon 3/23:00 pm
BOS
-
SJU
Nonstop4h 06m
Spirit Airlines
Thu 3/511:22 am
SJU
-
BOS
Nonstop4h 21m
Spirit Airlines
Deal found 2/20$146
This Expedia deal was found by Cheapflights users on 2/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/238:01 pm
BOS
-
SJU
Nonstop4h 07m
Spirit Airlines
Wed 3/411:22 am
SJU
-
BOS
Nonstop4h 21m
Spirit Airlines
Deal found 2/18$147
This Cheapflightsfares deal was found by Cheapflights users on 2/17. 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.
Mon 2/233:00 pm
BOS
-
SJU
Nonstop4h 06m
Spirit Airlines
Thu 2/2611:22 am
SJU
-
BOS
Nonstop4h 21m
Spirit Airlines
Deal found 2/17$148
This Priceline deal was found by Cheapflights users on 2/17. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2310:04 am
BOS
-
SJU
Nonstop3h 56m
Frontier
Thu 2/266:00 am
SJU
-
BOS
Nonstop4h 19m
Frontier
Deal found 2/17$149
This Orbitz deal was found by Cheapflights users on 2/19. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/288:01 pm
BOS
-
SJU
Nonstop4h 07m
Spirit Airlines
Thu 3/53:30 pm
SJU
-
BOS
Nonstop4h 26m
Spirit Airlines
Deal found 2/19$150
This Kiwi.com deal was found by Cheapflights users on 2/17. 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.
Mon 2/233:00 pm
BOS
-
SJU
Nonstop4h 06m
Multiple Airlines
Thu 3/56:00 am
SJU
-
BOS
Nonstop4h 19m
Multiple Airlines
Deal found 2/17$151
This Kiwi.com deal was found by Cheapflights users on 2/19. 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.
Tue 3/38:01 pm
BOS
-
SJU
Nonstop4h 07m
Spirit Airlines
Thu 3/511:22 am
SJU
-
BOS
Nonstop4h 21m
Spirit Airlines
Deal found 2/19$152

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 February 21, 2026.

Round-trip from

$143
(Travelocity)

One-way from

$72
(Expedia)

Popular in

December

Cheapest in

January

Average price

$298
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. 9% potential increase in price ($30 potential increase over avg. RT price).
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 February 2026
Search Deals

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 February 21, 2026.
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

Sat 5/9

3:32 pm-11:50 pm

1 stop8h 18m

San Juan Luis Munoz Marin Intl

Mon 5/11

1:00 am-10:18 am

2 stops9h 18m

$252

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Mon 5/4

8:10 am-12:11 pm

Nonstop4h 01m

San Juan Luis Munoz Marin Intl

Sat 5/9

1:30 pm-5:53 pm

Nonstop4h 23m

$263

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sat 5/9

8:20 am-12:28 pm

Nonstop4h 08m

San Juan Luis Munoz Marin Intl

Sat 5/16

1:30 pm-5:53 pm

Nonstop4h 23m

$263

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Tue 5/5

8:10 am-12:11 pm

Nonstop4h 01m

San Juan Luis Munoz Marin Intl

Sat 5/9

1:30 pm-5:53 pm

Nonstop4h 23m

$263

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Fri 5/8

8:20 am-12:28 pm

Nonstop4h 08m

San Juan Luis Munoz Marin Intl

Thu 5/14

1:30 pm-5:53 pm

Nonstop4h 23m

$263

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Mon 5/4

8:10 am-12:11 pm

Nonstop4h 01m

San Juan Luis Munoz Marin Intl

Fri 5/8

1:30 pm-5:53 pm

Nonstop4h 23m

$263

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Mon 5/4

8:10 am-12:11 pm

Nonstop4h 01m

San Juan Luis Munoz Marin Intl

Thu 5/7

1:30 pm-5:53 pm

Nonstop4h 23m

$263

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Wed 5/6

8:10 am-12:11 pm

Nonstop4h 01m

San Juan Luis Munoz Marin Intl

Tue 5/12

1:30 pm-5:53 pm

Nonstop4h 23m

$263

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Tue 5/12

8:20 am-12:28 pm

Nonstop4h 08m

San Juan Luis Munoz Marin Intl

Tue 5/19

7:00 am-4:00 pm

1 stop9h 00m

$268

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Wed 4/15

11:17 am-9:24 pm

2 stops10h 07m

San Juan Luis Munoz Marin Intl

Tue 4/21

1:00 am-9:11 am

1 stop8h 11m

$272

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/17

Showing 1-10 of 24 results
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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

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 February 18, 2026.

The best time to book flights from Boston to San Juan is 47 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, March is the cheapest month in which you can book a flight from Boston to San Juan (average of $69). Flying from Boston to San Juan in November is currently the most expensive (average of $177). 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 February 21, 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 14% on your trip compared to booking a flight at noon.

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 February 17, 2026.

Travelers seeking maximum savings on their Boston to San Juan flight should consider departing on Tuesday afternoons 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.

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 February 21, 2026.

The most flights from BOS to PR1 are scheduled on a Friday (23 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).

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

How often are flights from Boston to San Juan delayed?

About 24% of weekly flights between Boston and San Juan have experienced delays in the past year, with the average delay time being 150 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?

Wednesday tends to have the lowest number of delays on this route, whereas Thursday 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.

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 February 21, 2026.
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
8,228 reviews

Comfort

7.9

Entertainment

7.8

Food

7.2

Overall

7.9

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,228 reviews
Delta
7.9
Good
8,228 reviews

Comfort

7.9

Entertainment

7.8

Food

7.2

Overall

7.9

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,334 reviews
Delta
7.9
Good
8,228 reviews

Comfort

7.9

Entertainment

7.8

Food

7.2

Overall

7.9

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
JetBlue
7.2
Good
2,898 reviews
Delta
7.9
Good
8,228 reviews

Comfort

7.9

Entertainment

7.8

Food

7.2

Overall

7.9

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Spirit Airlines
6.3
Okay
8,482 reviews
Delta
7.9
Good
8,228 reviews

Comfort

7.9

Entertainment

7.8

Food

7.2

Overall

7.9

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Frontier
5.7
Fair
3,046 reviews
Delta
7.9
Good
8,228 reviews

Comfort

7.9

Entertainment

7.8

Food

7.2

Overall

7.9

Crew

8.5

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 14 flights from Logan Intl to San Juan per day from 7 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 01m. Your travel time can differ by up to 4h 17m. 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 ($77), Spirit Airlines ($88), and JetBlue ($124) offers the cheapest pricing from Boston to San Juan. You may be able to fly from Boston to San Juan for 74% 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 $60. However, be on the lookout for offers from Spirit Airlines and JetBlue, 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 Delta (69%), Aer Lingus (61%) and Qatar Airways (61%).

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

    The cheapest flight price from Boston to San Juan is $73. On average you can expect to pay $545. The most popular route, (Boston Logan Intl - San Juan Luis Munoz Marin Intl), can usually be booked for $140.

  • 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, March is the cheapest month in which you can book a flight from Boston to San Juan (average of $69). Flying from Boston to San Juan in November is currently the most expensive (average of $177). 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 February 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$77Average$227FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$88Average$248FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$124Average$549FlexibilityNo cancel feeOn-time62%
DeltaCheapest$139Average$320FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$166Average$335FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$242Average$419FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$383Average$533FlexibilityNo cancel feeOn-time63%

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