Cheap Flights from Boston (BOS) to San Juan (SIG)

Popular airlines from Logan International Airport (BOS) to San Juan (SIG-Fernando Luis Ribas Dominicci)

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Flights from Boston (BOS) to San Juan (SIG)
Origin airport
Logan Intl.
Destination airport
Fernando Luis Ribas Dominicci
Distance
1676 mi

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 . 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 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

Is it cheaper to buy a plane ticket from Logan Intl. Airport (BOS) to SIG last minute?
When it comes to booking your flights, being prepared pays off. While it may be possible to pick up a deal on a Logan Intl. Airport (BOS) to Fernando Luis Ribas Dominicci Airport flight at the last minute, prices usually don’t get cheaper as the date of departure nears. Based on flight pricing and demand studies in 2022, we have found that the sweet spot to book a domestic flight is between 28 – 35 days ahead. For international trips it’s three to four months.
What airports do you fly into for San Juan from Boston?
With Fernando Luis Ribas Dominicci Airport (SIG), Luis Munoz Marin Intl. Airport (SJU) and Mercedita Airport (PSE) to choose from, traveling from Boston to San Juan is simple. The city’s major hub, Fernando Luis Ribas Dominicci Airport (SIG), is about 1 mi southeast of the center. Along with the price of tickets, consider things like public transportation options from the airport and the distance to your hotel before making your choice. Get your San Juan vacation off to a terrific start by visiting San Juan Gate and La Fortaleza.
Can I change the date of my flight from Logan Intl. Airport to Fernando Luis Ribas Dominicci Airport (SIG)?
Expedia makes it a breeze to make amendments to your Logan Intl. Airport (BOS) to Fernando Luis Ribas Dominicci Airport journey yourself. Simply go to the Expedia Trips portal and click on “change flight.” Search for new flights and book the one that fits your new plans. You’ll get an estimate of the extra charges, if applicable. You can also visit our Customer Service portal to connect with our Virtual Agent and get answers to all your questions.

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