HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Juan

$99+ 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SJU
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boston to San Juan with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Boston Logan Intl to San Juan are usually found in October or January, booked 27 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 September 17, 2025.

Round-trip from

$176
(Expedia)

One-way from

$99
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$255
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. 0% potential increase in price ($2 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 September 17, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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.
Sat 11/12:15 pmBOS - SJU
1 stop10h 39mSpirit Airlines
Sat 2/75:27 pmSJU - BOS
Nonstop4h 07mSpirit Airlines
Deal found 9/15$195
This Cheapflightsfares deal was found by Cheapflights users on 9/17. 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.
Thu 10/25:50 amBOS - SJU
1 stop7h 53mSpirit Airlines
Mon 10/62:49 amSJU - BOS
1 stop10h 31mSpirit Airlines
Deal found 9/17$205
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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
Mon 10/62:49 amSJU - BOS
1 stop10h 31mSpirit Airlines
Deal found 9/15$206
This Cheapflightsfares deal was found by Cheapflights users on 9/16. 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
Sat 10/46:44 amSJU - BOS
1 stop7h 04mSpirit Airlines
Deal found 9/16$211
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 11/106:00 amBOS - SJU
1 stop9h 23mSpirit Airlines
Tue 11/1812:10 pmSJU - BOS
1 stop10h 58mSpirit Airlines
Deal found 9/15$213
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 12/55:45 amBOS - SJU
1 stop8h 41mSpirit Airlines
Wed 12/1012:10 pmSJU - BOS
1 stop10h 58mSpirit Airlines
Deal found 9/15$214
This Kiwi.com deal was found by Cheapflights users on 9/17. 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.
Sat 10/42:18 pmBOS - SJU
1 stop19h 34mMultiple Airlines
Fri 10/101:59 amSJU - BOS
1 stop29h 37mMultiple Airlines
Deal found 9/17$215
This Priceline deal was found by Cheapflights users on 9/15. 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.
Sat 11/12:15 pmBOS - SJU
1 stop10h 39mSpirit Airlines
Fri 11/712:10 pmSJU - BOS
1 stop10h 58mSpirit Airlines
Deal found 9/15$217
This Priceline deal was found by Cheapflights users on 9/16. 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.
Fri 11/146:00 amBOS - SJU
1 stop9h 23mSpirit Airlines
Tue 11/1812:10 pmSJU - BOS
1 stop10h 58mSpirit Airlines
Deal found 9/16$218
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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.
Sat 9/2712:20 pmBOS - SJU
1 stop8h 36mSpirit Airlines
Sat 10/46:44 amSJU - BOS
1 stop7h 04mSpirit Airlines
Deal found 9/15$219
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 11/176:00 amBOS - SJU
1 stop9h 23mSpirit Airlines
Wed 11/1912:10 pmSJU - BOS
1 stop10h 58mSpirit Airlines
Deal found 9/16$220
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Fri 10/32:53 pmBOS - SJU
1 stop10h 01mMultiple Airlines
Sat 10/412:28 amSJU - BOS
1 stop8h 15mMultiple Airlines
Deal found 9/15$222

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 September 17, 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 11/4

2:15 pm-10:04 pm

1 stop6h 49m

San Juan Luis Munoz Marin Intl

Thu 11/13

8:10 am-11:23 am

Nonstop4h 13m

$274

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sat 1/31

6:50 pm-11:56 pm

Nonstop4h 06m

San Juan Luis Munoz Marin Intl

Sun 2/1

6:15 am-9:25 am

Nonstop4h 10m

$277

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Tue 10/21

8:15 am-12:21 pm

Nonstop4h 06m

San Juan Luis Munoz Marin Intl

Sun 10/26

1:32 pm-5:45 pm

Nonstop4h 13m

$282

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 10/5

8:10 am-12:15 pm

Nonstop4h 05m

San Juan Luis Munoz Marin Intl

Thu 10/9

1:32 pm-5:45 pm

Nonstop4h 13m

$282

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Thu 1/29

6:50 pm-11:56 pm

Nonstop4h 06m

San Juan Luis Munoz Marin Intl

Wed 2/4

2:00 pm-5:13 pm

Nonstop4h 13m

$282

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Thu 2/26

6:00 pm-11:00 pm

Nonstop4h 00m

San Juan Luis Munoz Marin Intl

Mon 3/2

9:10 pm-12:21 am

Nonstop4h 11m

$282

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Thu 3/5

6:00 pm-11:00 pm

Nonstop4h 00m

San Juan Luis Munoz Marin Intl

Wed 3/11

3:30 pm-7:48 pm

Nonstop4h 18m

$282

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Fri 2/6

6:50 pm-11:56 pm

Nonstop4h 06m

San Juan Luis Munoz Marin Intl

Sat 2/14

10:40 pm-1:51 am

Nonstop4h 11m

$282

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Fri 3/6

6:00 pm-11:00 pm

Nonstop4h 00m

San Juan Luis Munoz Marin Intl

Tue 3/10

8:10 pm-12:21 am

Nonstop4h 11m

$282

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Wed 3/4

6:00 pm-11:00 pm

Nonstop4h 00m

San Juan Luis Munoz Marin Intl

Sat 3/14

5:15 am-9:23 am

Nonstop4h 08m

$282

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Showing 1-10 of 22 results
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

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 September 12, 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, 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 September 17, 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 11% 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 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. Saturday 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 September 17, 2025.

The most flights from BOS to PR1 are scheduled on a Wednesday (7 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 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 September 17, 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
7,961 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

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
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

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
7,961 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

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
2,914 reviews
Delta
8.0
Very good
7,961 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

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
8,023 reviews
Delta
8.0
Very good
7,961 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

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
3,173 reviews
Delta
8.0
Very good
7,961 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

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

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

    JetBlue can get you from Boston to San Juan in just under 6h 49m. Your travel time can differ by up to . Boston and San Juan are separated by a distance of 1678 mi.

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

    According to our current data, Frontier ($59), Spirit Airlines ($99), and Delta ($142) offers the cheapest pricing from Boston to San Juan. You may be able to fly from Boston to San Juan for 79% 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 Delta (89%), Hawaiian Airlines (76%) and Spirit Airlines (75%).

  • 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 $613. The most popular route, (Boston Logan Intl - San Juan Luis Munoz Marin Intl), can usually be booked for $176.

  • 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

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

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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$59Average$162FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$99Average$270FlexibilityNo cancel feeOn-time65%
DeltaCheapest$142Average$331FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$160Average$524FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$194Average$512FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$288Average$491FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$398Average$640FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.