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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 6 — Jul 131
Sun 7/6
Sun 7/13
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 August, booked 27 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 1, 2025.

Round-trip from

$174
(Cheapflightsfares)

One-way from

$96
(Cheapflightsfares)

Popular in

December

Cheapest in

September

Average price

$283
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. 10% potential increase in price ($30 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 1, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 6/30. 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.
Sun 8/310:03 amBOS - SJU
Nonstop4h 05mSpirit Airlines
Wed 8/63:50 pmSJU - BOS
1 stop7h 58mSpirit Airlines
Deal found 6/30$174
This Justfly.com deal was found by Cheapflights users on 6/29. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/299:01 amBOS - SJU
1 stop14h 58mMultiple Airlines
Mon 8/41:21 amSJU - BOS
1 stop7h 16mMultiple Airlines
Deal found 6/29$208
This FlightHub deal was found by Cheapflights users on 6/30. 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.
Thu 10/911:25 amBOS - SJU
1 stop9h 09mFrontier
Wed 10/151:21 pmSJU - BOS
1 stop19h 38mFrontier
Deal found 6/30$228
This Delta deal was found by Cheapflights users on 7/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/268:00 amBOS - SJU
Nonstop4h 06mDelta
Fri 8/291:16 pmSJU - BOS
Nonstop4h 14mDelta
Deal found 7/1$244

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 1, 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

Sun 8/3

10:03 am-2:08 pm

Nonstop4h 05m

San Juan Luis Munoz Marin Intl

Wed 8/6

3:50 pm-11:48 pm

1 stop7h 58m

$174

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Tue 7/29

9:01 am-11:59 pm

1 stop14h 58m

San Juan Luis Munoz Marin Intl

Tue 8/5

3:50 pm-11:48 pm

1 stop7h 58m

$208

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Thu 10/9

11:25 am-8:34 pm

1 stop9h 09m

San Juan Luis Munoz Marin Intl

Wed 10/15

1:21 pm-8:59 am

1 stop19h 38m

$228

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Tue 8/26

8:00 am-12:06 pm

Nonstop4h 06m

San Juan Luis Munoz Marin Intl

Fri 8/29

1:16 pm-5:30 pm

Nonstop4h 14m

$244

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 8/31

10:34 am-12:56 am

1 stop14h 22m

$96

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 7/13

12:57 pm-4:07 pm

1 stop27h 10m

$108

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Tue 9/2

5:40 am-12:45 pm

1 stop7h 05m

$127

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 8/31

9:56 am-2:01 pm

Nonstop4h 05m

$132

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Wed 7/16

6:00 am-5:03 pm

1 stop11h 03m

$135

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Fri 10/3

7:36 am-11:37 pm

1 stop16h 01m

$137

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

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 June 27, 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 July 1, 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 1, 2025.

The most flights from BOS to PR1 are scheduled on a Monday (15 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (5 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 1, 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
4,276 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.6

Food

7.0

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
4,276 reviews
Southwest
8.0
Very good
4,276 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.6

Food

7.0

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
7,973 reviews
Southwest
8.0
Very good
4,276 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.6

Food

7.0

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
2,920 reviews
Southwest
8.0
Very good
4,276 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.6

Food

7.0

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
4,276 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.6

Food

7.0

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
8,096 reviews
Southwest
8.0
Very good
4,276 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.6

Food

7.0

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 11 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 ($174), Frontier ($228), and Delta ($244) offers the cheapest pricing from Boston to San Juan. You may be able to fly from Boston to San Juan for 35% 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 Southwest, 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 Turkish Airlines (100%), Delta (93%) and TAP AIR PORTUGAL (77%).

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

    The cheapest flight price from Boston to San Juan is $90. On average you can expect to pay $373. 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 July 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$59Average$154FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$95Average$260FlexibilityNo cancel feeOn-time65%
DeltaCheapest$141Average$327FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$149Average$499FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$204Average$523FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$288Average$482FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$427Average$677FlexibilityNo cancel feeOn-time63%

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