HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Juan

$96+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SJU
Jul 19 — Jul 261
Sat 7/19
Sat 7/26
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 September or October, booked 26 days in advance, depart on a Monday or Tuesday 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 July 14, 2025.

Round-trip from

$176
(eDestinos)

One-way from

$96
(Cheapflightsfares)

Popular in

December

Cheapest in

September

Average price

$301
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. 8% potential increase in price ($23 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 14, 2025.

This eDestinos deal was found by Cheapflights users on 7/13. 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.
Tue 8/56:10 amBOS - SJU
1 stop9h 20mSpirit Airlines
Tue 9/91:59 amSJU - BOS
1 stop11h 49mSpirit Airlines
Deal found 7/13$176
This FlightHub deal was found by Cheapflights users on 7/11. 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.
Fri 8/19:40 amBOS - SJU
1 stop16h 59mMultiple Airlines
Wed 8/63:50 pmSJU - BOS
1 stop7h 58mMultiple Airlines
Deal found 7/11$214
This Priceline deal was found by Cheapflights users on 7/13. 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.
Thu 7/319:01 amBOS - SJU
1 stop14h 58mFrontier
Wed 8/612:59 amSJU - BOS
1 stop7h 00mFrontier
Deal found 7/13$227
This JetBlue deal was found by Cheapflights users on 7/11. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/278:45 pmBOS - SJU
Nonstop4h 06mJetBlue
Mon 7/286:00 amSJU - BOS
Nonstop4h 07mJetBlue
Deal found 7/11$241

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 14, 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 8/5

6:10 am-3:30 pm

1 stop9h 20m

San Juan Luis Munoz Marin Intl

Tue 9/9

1:59 am-1:48 pm

1 stop11h 49m

$176

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Fri 8/1

9:40 am-2:39 am

1 stop16h 59m

San Juan Luis Munoz Marin Intl

Wed 8/6

3:50 pm-11:48 pm

1 stop7h 58m

$214

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Thu 7/31

9:01 am-11:59 pm

1 stop14h 58m

San Juan Luis Munoz Marin Intl

Wed 8/6

12:59 am-7:59 am

1 stop7h 00m

$227

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 7/27

8:45 pm-12:51 am

Nonstop4h 06m

San Juan Luis Munoz Marin Intl

Mon 7/28

6:00 am-10:07 am

Nonstop4h 07m

$241

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 8/31

6:05 am-9:48 pm

1 stop15h 43m

$96

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Thu 7/24

9:01 am-11:59 pm

1 stop14h 58m

$115

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Mon 7/21

1:40 pm-5:44 pm

Nonstop4h 04m

$122

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Tue 8/12

8:00 am-12:06 pm

Nonstop4h 06m

$123

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Thu 8/14

1:15 pm-11:30 pm

1 stop10h 15m

$127

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Tue 7/22

6:00 am-2:54 pm

2 stops8h 54m

$130

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/13

Showing 1-10 of 11 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 July 11, 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 July 14, 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. 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 July 14, 2025.

The most flights from BOS to PR1 are scheduled on a Sunday (20 on average). You will have fewer flight options on Tuesday, 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 July 14, 2025.
Get a feel of what it's like to fly with Southwest, Delta, 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.
Southwest
8.0
Very good
4,243 reviews

Food

7.0

Entertainment

7.6

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,243 reviews
Southwest
8.0
Very good
4,243 reviews

Food

7.0

Entertainment

7.6

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,953 reviews
Southwest
8.0
Very good
4,243 reviews

Food

7.0

Entertainment

7.6

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
JetBlue
7.3
Good
2,908 reviews
Southwest
8.0
Very good
4,243 reviews

Food

7.0

Entertainment

7.6

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,243 reviews

Food

7.0

Entertainment

7.6

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Spirit Airlines
6.3
Okay
8,047 reviews
Southwest
8.0
Very good
4,243 reviews

Food

7.0

Entertainment

7.6

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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

    According to our current data, Spirit Airlines ($176), Frontier ($227), and JetBlue ($241) offers the cheapest pricing from Boston to San Juan. You may be able to fly from Boston to San Juan for 34% 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 Spirit Airlines, with whom users have recently found tickets for as low as $96. However, be on the lookout for offers from Frontier 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 (89%), Etihad Airways (84%) and EL AL (83%).

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

    The cheapest flight price from Boston to San Juan is $108. On average you can expect to pay $538. The most popular route, (Boston Logan Intl - San Juan Luis Munoz Marin Intl), can usually be booked for $181.

  • 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 July 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$59Average$155FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$96Average$261FlexibilityNo cancel feeOn-time65%
DeltaCheapest$141Average$327FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$148Average$500FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$204Average$519FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$288Average$479FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$427Average$677FlexibilityNo 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.