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Luis Munoz Marin Intl

$97+ Cheap flights from Boston (BOS) to Luis Munoz Marin Intl (SJU)

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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SJU
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Boston Logan Intl to San Juan Luis Munoz Marin Intl are usually found in September or October, booked 27 days in advance, depart on a Monday or Wednesday and return on a Friday

Cheap flight deals from Boston to Luis Munoz Marin Intl

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Luis Munoz Marin Intl (SJU). 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 11, 2025.

Round-trip from

$176
(CheapOair)

One-way from

$97
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$205

Good round-trip deal

$246 or less

Good one-way deal

$136 or less
From Boston Logan Intl to San Juan Luis Munoz Marin Intl
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One-way flight from Boston Logan Intl to San Juan Luis Munoz Marin Intl
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Highest demand for flights based on searches. 3% potential increase in price ($8 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 September 2025
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Price to beat on a round-trip flight from Boston Logan Intl to San Juan Luis Munoz Marin Intl.
Search Deals
Price to beat on a one-way flight from Boston Logan Intl to San Juan Luis Munoz Marin Intl.
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Find flight deals from Boston to Luis Munoz Marin Intl

Cheapest flights from Boston to Luis Munoz Marin Intl
Explore the most affordable flight options available from Boston to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 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 9/9$181
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2412:20 pmBOS - SJU
1 stop8h 36mSpirit Airlines
Wed 10/16:44 amSJU - BOS
1 stop7h 04mSpirit Airlines
Deal found 9/9$190
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
Thu 9/256:49 pmBOS - SJU
1 stop16h 15mSpirit Airlines
Tue 9/306:44 amSJU - BOS
1 stop7h 04mSpirit Airlines
Deal found 9/10$193
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 12/36:15 amBOS - SJU
1 stop16h 04mSpirit Airlines
Tue 2/35:27 pmSJU - BOS
Nonstop4h 07mSpirit Airlines
Deal found 9/10$195
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 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
Wed 10/16:44 amSJU - BOS
1 stop7h 04mSpirit Airlines
Deal found 9/9$200
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2312:20 pmBOS - SJU
1 stop8h 36mSpirit Airlines
Sat 9/276:44 amSJU - BOS
1 stop7h 04mSpirit Airlines
Deal found 9/9$207
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com 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 9/10$209
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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.
Wed 9/2412:20 pmBOS - SJU
1 stop8h 36mSpirit Airlines
Tue 9/306:44 amSJU - BOS
1 stop7h 04mSpirit Airlines
Deal found 9/11$211
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2012:20 pmBOS - SJU
1 stop8h 36mSpirit Airlines
Wed 9/246:44 amSJU - BOS
1 stop7h 04mSpirit Airlines
Deal found 9/9$212
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/116:15 amBOS - SJU
1 stop12h 06mSpirit Airlines
Sat 11/156:00 amSJU - BOS
1 stop18h 25mSpirit Airlines
Deal found 9/11$213

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to Luis Munoz Marin Intl 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 11, 2025.
Use the filters below to find and compare flights from Boston to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Boston

Fly to

Luis Munoz Marin Intl

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 pm-11:16 pm

Nonstop4h 06m

$270

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Mon 1/5

8:00 am-1:05 pm

Nonstop4h 05m

San Juan Luis Munoz Marin Intl

Thu 1/29

2:23 pm-5:51 pm

Nonstop4h 28m

$282

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Tue 11/4

8:15 am-1:21 pm

Nonstop4h 06m

San Juan Luis Munoz Marin Intl

Thu 11/13

2:27 pm-5:50 pm

Nonstop4h 23m

$282

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 11/16

6:55 pm-11:54 pm

Nonstop3h 59m

San Juan Luis Munoz Marin Intl

Mon 11/24

9:25 pm-12:30 am

Nonstop4h 05m

$282

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 9/28

6:05 am-12:13 pm

1 stop6h 08m

San Juan Luis Munoz Marin Intl

Wed 10/15

1:32 pm-5:45 pm

Nonstop4h 13m

$287

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 11/16

9:59 am-5:20 pm

1 stop6h 21m

San Juan Luis Munoz Marin Intl

Thu 11/20

2:27 pm-5:50 pm

Nonstop4h 23m

$287

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 1/18

8:10 am-1:18 pm

Nonstop4h 08m

San Juan Luis Munoz Marin Intl

Sat 1/24

7:30 am-5:47 pm

1 stop11h 17m

$287

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 11/16

6:00 am-2:40 pm

1 stop7h 40m

San Juan Luis Munoz Marin Intl

Wed 11/19

2:05 am-9:14 am

1 stop8h 09m

$291

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 11/9

1:55 pm-6:57 pm

Nonstop4h 02m

San Juan Luis Munoz Marin Intl

Fri 11/14

3:34 pm-11:48 pm

1 stop9h 14m

$291

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 3/1

2:00 pm-10:04 pm

1 stop7h 04m

San Juan Luis Munoz Marin Intl

Tue 3/10

8:10 pm-12:21 am

Nonstop4h 11m

$291

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 22 results
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The best insider tips for Boston to San Juan Luis Munoz Marin Intl Airport flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Boston to San Juan Luis Munoz Marin Intl Airport trip
Airlines
Frontier

Frontier offers extra comfort seats with 32” separation for a fee, enhancing your flight experience.


Frontier’s Discount Den offers Kids Fly Free, ideal for family travel savings.

Read more about Frontierby Marisa Garcia
Spirit Airlines

Spirit’s Big Front Seats offer 11 inches more legroom, ideal for comfort on medium-haul flights.


Spirit’s Saver$ Club offers rotating deals and discounts on luggage and seats, maximizing savings.

Read more about Spirit Airlinesby Daniel Scheffler
Airports
BOS

Use the FlyLogan App to pre-order meals and save time at BOS. Most eateries participate, ensuring your meal is ready for pick-up.

Read more about BOSby Paul Rubio
SJU

Opt for rideshares like Uber at SJU for convenience and cashless payments. Taxis are available but often require cash despite claiming card acceptance.

Read more about SJUby Brandon Schultz
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Frontier

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Daniel Scheffler

Daniel Scheffler

Expert on Spirit Airlines

Daniel Scheffler

Daniel Scheffler

Daniel Scheffler is a travel writer, podcaster, and producer. Born in Africa, bred in Europe and now living in America he has traveled to 140 countries (and all 50 U.S. states). Plus he has stayed at over 2500 hotels across the globe. His original shows Everywhere and Without Maps (available on Spotify) showcase his beliefs, travel is about humanity and sharing that beauty. And thus it reminds you that you shouldn’t believe everything you think.

Read more
Paul Rubio

Paul Rubio

Expert on BOS

Paul Rubio

Paul Rubio

Travel journalist and photographer Paul Rubio is a Miami native (and current resident), who has lived in nine countries and traveled to 137. He is an expert in luxury travel, eco-travel, loyalty programs, hotels, airports and airlines. He is a contributing editor at AFAR, Condé Nast Traveler, LUXURY Magazine, and Palm Beach Illustrated.

Read more
Brandon Schultz

Brandon Schultz

Expert on SJU

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more

Best time to book a flight from Boston to Luis Munoz Marin Intl

Have a flexible travel schedule? Discover the best time to fly to Luis Munoz Marin Intl 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 Luis Munoz Marin Intl Airport

How far ahead should I book a flight from Boston to San Juan Luis Munoz Marin Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Boston to Luis Munoz Marin Intl. Price data was last updated on August 29, 2025.

The price you pay for your flight from Boston to San Juan Luis Munoz Marin Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 27 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Boston to San Juan Luis Munoz Marin Intl Airport?

Currently, September is the cheapest month in which you can book a flight from Boston to San Juan Luis Munoz Marin Intl Airport (average of $254). Flying from Boston to San Juan Luis Munoz Marin Intl Airport 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 Luis Munoz Marin Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

A simple way to save on the total cost of your ticket is to fly from Boston to San Juan Luis Munoz Marin Intl Airport 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 in the evening.

What is the cheapest day to fly from Boston to San Juan Luis Munoz Marin Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Boston to Luis Munoz Marin Intl. Price data was last updated on September 7, 2025.

Travelers seeking maximum savings on their Boston to San Juan Luis Munoz Marin Intl Airport 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.

Reviews of airlines servicing Luis Munoz Marin Intl

Get insights into the airlines that provide service to Luis Munoz Marin Intl. 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 Luis Munoz Marin Intl. Reviews last updated September 11, 2025.
Peruse reviews from past customers who have flown with Delta, American Airlines, and JetBlue from Boston to San Juan Luis Munoz Marin Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

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
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

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
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

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
2,913 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

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
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

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
3,177 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

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 Luis Munoz Marin Intl. 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 Luis Munoz Marin Intl?

    Boston Logan Intl (BOS) is the airport you will fly out of if you book a flight from Boston to San Juan Luis Munoz Marin Intl. You should not have trouble finding flights to San Juan Luis Munoz Marin Intl from Logan Intl; the airport handles an average of 4 outbound flights to San Juan Luis Munoz Marin Intl per day. You should also have plenty of airline options to choose from since 7 airlines have flights from the Boston airport to San Juan Luis Munoz Marin Intl. It is only a 2.6 mi journey to Logan Intl (BOS) from Boston’s city center.

  • How long is the flight from Boston to San Juan Luis Munoz Marin Intl Airport?

    Departing from Boston to San Juan Luis Munoz Marin Intl Airport will take you 4h 05m. There are 1678 mi between Boston and San Juan Luis Munoz Marin Intl Airport. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Boston to San Juan Luis Munoz Marin Intl Airport round-trip?

    Currently priced at $80, Frontier will fly you from Boston to San Juan Luis Munoz Marin Intl Airport and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Spirit Airlines and Delta - these airlines can fly you to your destination from $99 and $141, respectively. These flights start at 71% lower than the current average price 3 months from now.

  • What are the most reliable airlines from Boston to San Juan Luis Munoz Marin Intl Airport?

    Consider Delta (92%), EL AL (79%) or TAP AIR PORTUGAL (76%) when booking your flight. These represent the most reliable airlines when flying from Boston to San Juan Luis Munoz Marin Intl Airport.

  • What are the cheapest flights from Boston to San Juan Luis Munoz Marin Intl Airport?

    While on average a flight from Boston to San Juan Luis Munoz Marin Intl Airport is generally $615, our data shows the cheapest flight currently is $123. When looking at the most popular route, (Boston Logan Intl - San Juan Luis Munoz Marin Intl), you can expect to pay $176 for that flight.

  • Can I find deals for flights from Boston to Luis Munoz Marin Intl that include hotel bookings?

    Yes. In addition to deals on Boston to Luis Munoz Marin Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to Luis Munoz Marin Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Luis Munoz Marin Intl.

  • Can I find deals for business class flights from Boston to Luis Munoz Marin Intl?

    Yes. Cheapflights offers flight deals from Boston to Luis Munoz Marin Intl 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 Luis Munoz Marin Intl Airport?

    Currently, September is the cheapest month in which you can book a flight from Boston to San Juan Luis Munoz Marin Intl Airport (average of $254). Flying from Boston to San Juan Luis Munoz Marin Intl Airport 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

Traveling to a place near San Juan Luis Munoz Marin Intl Airport?

Book flights to San Juan Luis Munoz Marin Intl Airport if you plan to visit one of these locations
Dorado
Fajardo
Rio Grande
Luquillo
Humacao

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Alternative routes for Boston to Luis Munoz Marin Intl

See prices for flight routes from nearby airports that may be better suited for you.
Hartford to Luis Munoz Marin Intl flights
Albany to Luis Munoz Marin Intl flights
Worcester to Luis Munoz Marin Intl flights
Provincetown to Luis Munoz Marin Intl flights

Top 7 airlines flying from Boston to Luis Munoz Marin Intl

Discover the top 7 airlines that operate flights from Boston to Luis Munoz Marin Intl. 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 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$80Average$180FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$99Average$270FlexibilityNo cancel feeOn-time65%
DeltaCheapest$141Average$330FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$159Average$355FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$194Average$512FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$288Average$499FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$398Average$640FlexibilityNo cancel feeOn-time63%

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