$1,334 Cheap Flights from Boston (BOS) to San Juan (UAQ)

View $1,334 flight on Thu, Jan 1, 2026Opens in a new window

Popular airlines from Logan International Airport (BOS) to San Juan (UAQ-Domingo Faustino Sarmiento)

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

Prices were available within the past 7 days and start at $1,334 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Flights from Boston (BOS) to San Juan (UAQ)
Origin airport
Logan Intl.
Destination airport
Domingo Faustino Sarmiento
Distance
5110 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 $1,334 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 Domingo Faustino Sarmiento Airport (UAQ) cost?
Lock in a cheap one-way flight from $1,334 or cheap return flight from Logan Intl. Airport (BOS) to Domingo Faustino Sarmiento Airport (UAQ) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Logan Intl. Airport (BOS) to Domingo Faustino Sarmiento Airport (UAQ)?
is the most affordable month to fly from BOS to UAQ. Planning your trip for the off-season is often the key to finding better fares.
What is the cheapest airline that flies from Logan Intl. Airport (BOS) to Domingo Faustino Sarmiento Airport (UAQ)?
To find the cheapest airline flying from BOS to UAQ, use Expedia's filter tool. Customize your search based on what matters most to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Logan Intl. Airport (BOS) to Domingo Faustino Sarmiento Airport (UAQ)?
You'll have to take a flight with a layover when traveling from Logan Intl. Airport (BOS) to Domingo Faustino Sarmiento Airport (UAQ). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from BOS to UAQ?
Typically you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can change depending on the airline, season and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Logan Intl. Airport (BOS) to Domingo Faustino Sarmiento Airport (UAQ)?
To reach Domingo Faustino Sarmiento Airport (UAQ) on time, choose a flight that leaves 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.
Is it cheaper to buy a plane ticket from Logan Intl. Airport (BOS) to Domingo Faustino Sarmiento Airport (UAQ) last-minute?
Last-minute bookings from BOS to UAQ are usually more expensive. To lock in the cheapest rates, start searching for flights well in advance. That being said, if you're flexible with your travel dates, it's possible to score a cheap fare just before your departure.
Is it cheaper to book a BOS to UAQ flight and hotel package?
Compared with arranging hotels and flights separately, booking a BOS to UAQ flight and hotel package with Expedia could result in significant savings. Better yet, having it all in one place takes the hassle out of travel planning. Simply secure your flights and select from our wide range of stays, then tailor your trip with extras like car rentals and activities.
Can I cancel or change the date of my flight from Logan Intl. Airport (BOS) to Domingo Faustino Sarmiento Airport (UAQ)?
In most instances, you're able to reschedule or cancel your BOS to UAQ flight. However, additional charges may apply, especially if you made your booking over 24 hours ago. Check your itinerary for the airline's fees and policies on flight changes, or if you'd like further information, head to our Customer Service portal.

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*Available to One Key members.