$78 Cheap Flights from Boston (BOS) to San Juan (SJU)

View $78 flight on Sun, Aug 10, 2025Opens in a new window

Popular airlines from Logan International Airport (BOS) to Luis Munoz Marin Intl. Airport (SJU)

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Cheap Flights from Boston to San Juan (BOS-SJU)

Prices were available within the past 7 days and start at $78 for one-way flights and $156 for roundtrip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Spirit Airlines
Sun, Jul 13 - Thu, Jul 17
BOS
Boston
SJU
San Juan
$156
Roundtrip
Just found
Select Spirit Airlines flight, departing Sun, Jul 13 from Boston to San Juan, returning Thu, Jul 17, priced at $156 Just found
Spirit Airlines
Thu, Jul 10 - Thu, Jul 17
BOS
Boston
SJU
San Juan
$177
Roundtrip
Just found
Select Spirit Airlines flight, departing Thu, Jul 10 from Boston to San Juan, returning Thu, Jul 17, priced at $177 Just found
Spirit Airlines
Sun, Jul 13 - Wed, Jul 30
BOS
Boston
SJU
San Juan
$185
Roundtrip
Found 3 hours ago
Select Spirit Airlines flight, departing Sun, Jul 13 from Boston to San Juan, returning Wed, Jul 30, priced at $185 Found 3 hours ago
Spirit Airlines
Sun, Jul 20 - Thu, Jul 24
BOS
Boston
SJU
San Juan
$188
Roundtrip
Found 1 hour ago
Select Spirit Airlines flight, departing Sun, Jul 20 from Boston to San Juan, returning Thu, Jul 24, priced at $188 Found 1 hour ago
Spirit Airlines
Sun, Jun 29 - Wed, Jul 9
BOS
Boston
SJU
San Juan
$190
Roundtrip
Found 16 hours ago
Select Spirit Airlines flight, departing Sun, Jun 29 from Boston to San Juan, returning Wed, Jul 9, priced at $190 Found 16 hours ago
Spirit Airlines
Wed, Jul 9 - Thu, Jul 24
BOS
Boston
SJU
San Juan
$195
Roundtrip
Found 1 day ago
Select Spirit Airlines flight, departing Wed, Jul 9 from Boston to San Juan, returning Thu, Jul 24, priced at $195 Found 1 day ago
Frontier Airlines
Sat, Jul 19 - Thu, Jul 24
BOS
Boston
SJU
San Juan
$205
Roundtrip
Found 4 hours ago
Select Frontier Airlines flight, departing Sat, Jul 19 from Boston to San Juan, returning Thu, Jul 24, priced at $205 Found 4 hours ago
United
Tue, Oct 21 - Wed, Oct 22
BOS
Boston
SJU
San Juan
$222
Roundtrip
Found 3 days ago
Select United flight, departing Tue, Oct 21 from Boston to San Juan, returning Wed, Oct 22, priced at $222 Found 3 days ago
Southwest Airlines
Sun, Jun 29 - Sat, Jul 12
BOS
Boston
SJU
San Juan
$278
Roundtrip
Found 4 hours ago
Select Southwest Airlines flight, departing Sun, Jun 29 from Boston to San Juan, returning Sat, Jul 12, priced at $278 Found 4 hours ago
Delta
Fri, Jun 27 - Sat, Aug 2
BOS
Boston
SJU
San Juan
$284
Roundtrip
Found 15 hours ago
Select Delta flight, departing Fri, Jun 27 from Boston to San Juan, returning Sat, Aug 2, priced at $284 Found 15 hours ago

Alternative airports near San Juan

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Luis Munoz Marin Intl. SJU. Cheapest option available. Average driving time to city center is 16 minutes. Flights from $294
SJU
Luis Munoz Marin Intl.
Cheapest
Average driving time to city center16 min
Flights from $294
Flights from Boston (BOS) to San Juan (SJU)
Origin airport
Logan Intl.
Destination airport
Luis Munoz Marin Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, Spirit Airlines, United
Roundtrip price
$156
Distance
1679 mi
Average flight time
4 hours 3 mins

Boston to San Juan Flights

The cheapest times to fly from Boston to San Juan

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Boston to San Juan are during the month of July. You can find some of the cheapest flights from Boston to San Juan with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Boston to San Juan

Sunday is one of the best days to book for cheap flights from Boston to San Juan: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Boston to San Juan

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Boston to San Juan in 2025. You can also book with separate airlines for your outbound and return journeys, from $78 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Boston to San Juan flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Boston to San Juan airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Logan Intl. Airport (BOS) to Luis Munoz Marin Intl. Airport (SJU) cost?
You can find cheap return fares from Logan Intl. Airport (BOS) to Luis Munoz Marin Intl. Airport (SJU) starting at $183. Grab a seat and take off on your trip. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Spirit Airlines flight leaving BOS on June 26 2025 and touching down at SJU. The price was last updated on June 12 2025 and has not changed since.
What is the cheapest month to fly from BOS to SJU?
The cheapest flights from BOS to SJU are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Logan Intl. Airport (BOS) to Luis Munoz Marin Intl. Airport (SJU)?
Take the express route to Luis Munoz Marin Intl. Airport (SJU). 3 carriers offer direct routes from Logan Intl. Airport (BOS), including:

  • JetBlue Airways
  • Delta Air Lines
  • Frontier Airlines

What is the cheapest airline that flies from BOS to SJU?
Book a flight from BOS to SJU with Spirit Airlines. This airline currently has the cheapest one-way ticket for this route, starting from $78. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from BOS on August 10 2025. Prices were last updated on June 12 2025 and have not changed since.
How many flights per day from Logan Intl. Airport (BOS) to Luis Munoz Marin Intl. Airport (SJU)?
When flying out of Logan Intl. Airport (BOS), you’ll have your pick from an average of 5 daily nonstop flights to Luis Munoz Marin Intl. Airport (SJU).
What are the most popular departure times for flights from Logan Intl. Airport (BOS) to Luis Munoz Marin Intl. Airport (SJU)?
The 8 AM departures from BOS to SJU are typically the busiest. These flights can come with a higher price due to their popularity. If you want to save money, book during off-peak hours.
What day of the week has the most flights from BOS to SJU?
Saturday has the most flights from Logan Intl. Airport (BOS) to Luis Munoz Marin Intl. Airport (SJU). Consider jetting off on this day and you’ll have a greater chance of finding a departure that fits your plans.
What is the earliest flight from Logan Intl. Airport (BOS) to Luis Munoz Marin Intl. Airport (SJU)?
The earliest flight leaving Logan Intl. Airport (BOS) is at around 7:00AM UTC-5. Hop on this flight and you’ll land at Luis Munoz Marin Intl. Airport (SJU) at approximately 12:00PM UTC-4. The overall travel time is 4h.
How long does it take to fly from Logan Intl. Airport (BOS) to Luis Munoz Marin Intl. Airport (SJU)?
Flights from BOS to SJU have an average travel time of 4 hours and 1 minute. The total distance between the two airports is 1,700 mi.
What airline has the least delays from BOS to SJU?
With 85% of journeys usually landing on schedule, Delta Air Lines has the best on-time performance for nonstop flights from Logan Intl. Airport (BOS) to Luis Munoz Marin Intl. Airport (SJU). To keep track of your flight status and get notifications about any changes, use the Expedia App.
What is the best time to fly from Logan Intl. Airport (BOS) to Luis Munoz Marin Intl. Airport (SJU)?
To land at Luis Munoz Marin Intl. Airport (SJU) without delays, pick a flight that leaves from Logan Intl. Airport (BOS) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for San Juan from Logan Intl. Airport (BOS)?
If you’re on a direct flight from Logan Intl. Airport (BOS) to San Juan, Luis Munoz Marin Intl. Airport (SJU) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from Logan Intl. Airport (BOS) to Luis Munoz Marin Intl. Airport (SJU) last-minute?
Waiting until right before your break to book your flight from BOS to SJU often results in higher prices. While it’s possible to find some last-minute discounts, there’s no guarantee. Keep your travel plans flexible to boost your chances of getting a bargain.
Can I cancel or change the date of my flight from Logan Intl. Airport (BOS) to Luis Munoz Marin Intl. Airport (SJU)?
You can usually cancel or reschedule your BOS to SJU flight. However, if it’s been more than 24 hours since booking, additional fees may apply. Check your airline’s policies in your itinerary to see what changes are possible and if any costs are involved. You’ll also find further details on our Customer Service portal.

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