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San Juan

$95+ 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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SJU
Aug 16 — Aug 231
Sat 8/16
Sat 8/23
1 adult, Economy
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Cheapflights Tip: The best prices from Boston Logan Intl to San Juan are usually found in September or October, booked 26 days in advance, depart on a Monday or Wednesday and return on a Friday

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 August 11, 2025.

Round-trip from

$202
(FlightHub)

One-way from

$95
(FlightHub)

Popular in

December

Cheapest in

September

Average price

$303
From Boston Logan Intl to San Juan
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One-way flight from Boston Logan Intl to San Juan
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Highest demand for flights based on searches. 2% potential increase in price ($7 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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 August 11, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 8/11. 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 9/912:20 pmBOS - SJU
1 stop8h 36mSpirit Airlines
Wed 9/176:44 amSJU - BOS
1 stop7h 04mSpirit Airlines
Deal found 8/11$191
This FlightHub deal was found by Cheapflights users on 8/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/912:20 pmBOS - SJU
1 stop8h 36mSpirit Airlines
Thu 9/112:38 pmSJU - BOS
1 stop8h 09mSpirit Airlines
Deal found 8/10$202
This Cheapflightsfares deal was found by Cheapflights users on 8/10. 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 9/912:20 pmBOS - SJU
1 stop8h 36mSpirit Airlines
Tue 10/76:44 amSJU - BOS
1 stop7h 04mSpirit Airlines
Deal found 8/10$203
This FlightHub deal was found by Cheapflights users on 8/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/302:53 pmBOS - SJU
1 stop9h 04mSpirit Airlines
Sat 9/66:44 amSJU - BOS
1 stop7h 04mSpirit Airlines
Deal found 8/11$206
This SmartFares deal was found by Cheapflights users on 8/10. 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 10/26:49 pmBOS - SJU
1 stop16h 15mSpirit Airlines
Tue 10/76:44 amSJU - BOS
1 stop7h 04mSpirit Airlines
Deal found 8/10$208
This Priceline deal was found by Cheapflights users on 8/9. 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.
Tue 9/912:20 pmBOS - SJU
1 stop8h 36mSpirit Airlines
Tue 9/166:44 amSJU - BOS
1 stop7h 04mSpirit Airlines
Deal found 8/9$210
This Cheapflightsfares deal was found by Cheapflights users on 8/8. 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 9/16:30 amBOS - SJU
1 stop7h 47mSpirit Airlines
Thu 9/42:38 pmSJU - BOS
1 stop8h 09mSpirit Airlines
Deal found 8/8$211
This Cheapflightsfares deal was found by Cheapflights users on 8/8. 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.
Fri 9/52:53 pmBOS - SJU
1 stop10h 01mSpirit Airlines
Thu 9/256:44 amSJU - BOS
1 stop7h 04mSpirit Airlines
Deal found 8/8$213
This Cheapflightsfares deal was found by Cheapflights users on 8/10. 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.
Fri 9/52:53 pmBOS - SJU
1 stop10h 01mSpirit Airlines
Fri 9/1211:59 amSJU - BOS
1 stop11h 58mSpirit Airlines
Deal found 8/10$214
This Cheapflightsfares deal was found by Cheapflights users on 8/10. 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.
Wed 10/112:20 pmBOS - SJU
1 stop8h 36mSpirit Airlines
Sun 10/511:59 amSJU - BOS
1 stop11h 58mSpirit Airlines
Deal found 8/10$215

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 August 11, 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

Tue 9/9

12:20 pm-8:56 pm

1 stop8h 36m

San Juan Luis Munoz Marin Intl

Wed 9/17

6:44 am-1:48 pm

1 stop7h 04m

$191

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Tue 2/3

11:13 am-4:07 pm

Nonstop3h 54m

San Juan Luis Munoz Marin Intl

Tue 2/10

12:10 pm-10:08 pm

1 stop10h 58m

$195

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Tue 9/9

12:20 pm-8:56 pm

1 stop8h 36m

San Juan Luis Munoz Marin Intl

Thu 9/11

2:38 pm-10:47 pm

1 stop8h 09m

$202

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Tue 9/9

12:20 pm-8:56 pm

1 stop8h 36m

San Juan Luis Munoz Marin Intl

Tue 10/7

6:44 am-1:48 pm

1 stop7h 04m

$203

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sat 9/13

12:20 pm-8:56 pm

1 stop8h 36m

San Juan Luis Munoz Marin Intl

Thu 9/18

11:59 am-11:57 pm

1 stop11h 58m

$205

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sat 8/30

2:53 pm-11:57 pm

1 stop9h 04m

San Juan Luis Munoz Marin Intl

Sat 9/6

6:44 am-1:48 pm

1 stop7h 04m

$206

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Thu 10/2

6:49 pm-11:04 am

1 stop16h 15m

San Juan Luis Munoz Marin Intl

Tue 10/7

6:44 am-1:48 pm

1 stop7h 04m

$208

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Tue 9/9

12:20 pm-8:56 pm

1 stop8h 36m

San Juan Luis Munoz Marin Intl

Tue 9/16

6:44 am-1:48 pm

1 stop7h 04m

$210

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Mon 9/1

6:30 am-2:17 pm

1 stop7h 47m

San Juan Luis Munoz Marin Intl

Thu 9/4

2:38 pm-10:47 pm

1 stop8h 09m

$211

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Fri 9/5

2:53 pm-12:54 am

1 stop10h 01m

San Juan Luis Munoz Marin Intl

Thu 9/25

6:44 am-1:48 pm

1 stop7h 04m

$213

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/10

Showing 1-10 of 20 results
1
2

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 August 8, 2025.

The best time to book flights from Boston to San Juan is 26 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, September is the cheapest month in which you can book a flight from Boston to San Juan (average of $254). Flying from Boston to San Juan in June is currently the most expensive (average of $339). 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 August 11, 2025.

A simple way to save on the total cost of your ticket is to fly from Boston to San Juan in the morning. If you’re flexible enough to do this you can expect to save up to 13% 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 Tuesday afternoons when fares are most often at their lowest. Wednesday at noon 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 August 11, 2025.

The most flights from BOS to PR1 are scheduled on a Sunday (21 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (13 on average).

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 August 11, 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
8.0
Very good
7,979 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,979 reviews
Delta
8.0
Very good
7,979 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,979 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
JetBlue
7.2
Good
2,916 reviews
Delta
8.0
Very good
7,979 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Spirit Airlines
6.3
Okay
8,042 reviews
Delta
8.0
Very good
7,979 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Frontier
5.8
Fair
3,221 reviews
Delta
8.0
Very good
7,979 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 16 flights from Logan Intl to San Juan per day from 7 different airlines.

  • What is the cheapest airline to fly from Boston to San Juan round-trip?

    According to our current data, Spirit Airlines ($191), offers the cheapest pricing from Boston to San Juan. You may be able to fly from Boston to San Juan for 31% less than the average price by searching for this airline.

  • 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 Etihad Airways (96%), Delta (90%) and TAP AIR PORTUGAL (88%).

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

    The cheapest flight price from Boston to San Juan is $118. On average you can expect to pay $586. The most popular route, (Boston Logan Intl - San Juan Luis Munoz Marin Intl), can usually be booked for $174.

  • 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, September is the cheapest month in which you can book a flight from Boston to San Juan (average of $254). Flying from Boston to San Juan in June is currently the most expensive (average of $339). 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

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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 August 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$59Average$160FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$99Average$268FlexibilityNo cancel feeOn-time65%
DeltaCheapest$140Average$330FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$153Average$519FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$204Average$516FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$288Average$496FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$416Average$652FlexibilityNo cancel feeOn-time63%

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