BOS - SJU

Find cheap flights from Boston to San Juan

1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Juan Luis Munoz Marin Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to San Juan, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to San Juan, as well as popular online travel agencies
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Expert advice
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to San Juan that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boston to San Juan

Multiple Airlines Logo
BOS-SJU
4346 kmmulti-stop
Multiple Airlines Logo
SJU-BOS
4346 kmmulti-stop
Multiple Airlines
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Everything you should know

Our travellers' advice
AI-generated summary based on content written by travel experts
JetBlue offers free Wi-Fi and live TV for all passengers.
Frontier's carry-on bags have fees; pay early to save.
Expert advice
Expert advice
Expert advice
Expert advice
When to book
2 weeks
in advance
Our data shows that travellers who book at least 2 weeks in advance save around 13% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 25% price drop
February
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
Multiple Airlines
Tue 28/10
BOS - SJU • multi-stop
Cheapest one-way flights
Multiple Airlines
Tue 28/10
BOS - SJU • multi-stop
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to San Juan!
Booking Insights

KAYAK's insights & trends for Boston to San Juan flights

Get data-powered insights and trends into flights from Boston to San Juan to help you find the cheapest flights, the best time to fly and much more.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to San Juan Luis Munoz Marin Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Boston to San Juan Luis Munoz Marin Intl Airport is January, where tickets cost C$ 312 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is C$ 531 and C$ 482 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Boston to San Juan Luis Munoz Marin Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Boston to San Juan Luis Munoz Marin Intl Airport, you should book around 2 weeks before departure, which saves you about 13% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Expert advice

Expert advice for your flight from Boston to San Juan

 
Snippets provided in this section are AI-generated based on a summarisation of KAYAK-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.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
JetBlue

JetBlue offers free gate-to-gate Wi-Fi and live TV channels for all passengers.


JetBlue’s Even More Space upgrade provides up to 18 cm extra legroom and priority boarding.

Read more about JetBlueby Harriet Baskas
Frontier

Frontier’s Premium Bundle includes priority boarding and extra legroom for just CA$27 more.


Frontier charges for carry-on bags; pay early online to save money.

Read more about Frontierby Stefanie Waldek
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on JetBlue

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on Frontier

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more

Good to know

Low seasonSeptember
Best time to beat the crowds (5% less expensive on average)
Most popular time to fly and prices are also 1% lower on average.

When to book flights from Boston to San Juan

Are your dates flexible? Find out the best times to travel from Boston to San Juan based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Boston to San Juan flights

  • Which airlines offer Wi-Fi service onboard planes from Boston to San Juan?

    JetBlue, Delta, and American Airlines offer inflight Wi-Fi service on the Boston to San Juan flight route.

  • Which aircraft models fly most regularly from Boston to San Juan?

    The Airbus A321neo is the aircraft model that flies most regularly on the Boston to San Juan flight route.

  • On which days can I fly direct from Boston to San Juan?

    There are direct flights from Boston to San Juan on a daily basis.

  • Which is the best airline for flights from Boston to San Juan, JetBlue or Spirit Airlines?

    The two airlines most popular with KAYAK users for flights from Boston to San Juan are JetBlue and Spirit Airlines. With an average price for the route of C$ 394 and an overall rating of 7.2, JetBlue is the most popular choice. Spirit Airlines is also a great choice for the route, with an average price of C$ 246 and an overall rating of 6.3.

  • How does KAYAK find such low prices on flights from Boston to San Juan?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boston to San Juan.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boston to San Juan?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Juan from Boston is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boston to San Juan?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Juan with an airline and back to Boston with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boston to San Juan?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Juan from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Prefer to fly direct from Boston to San Juan?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Boston Logan Intl to San Juan Luis Munoz Marin Intl.
Find which airlines fly direct from Boston Logan Intl Airport to San Juan Luis Munoz Marin Intl Airport, which days they fly and book direct flights.

Direct departures

Boston Logan Intl to San Juan Luis Munoz Marin Intl

Monday

Delta,JetBlue,Spirit Airlines

Delta,JetBlue, +1 more

Tuesday

Delta,JetBlue,Frontier, +1 more

Delta,JetBlue, +2 more

Wednesday

Delta,JetBlue,Spirit Airlines

Delta,JetBlue, +1 more

Thursday

Delta,JetBlue,Frontier, +1 more

Delta,JetBlue, +2 more

Friday

Delta,JetBlue,Spirit Airlines

Delta,JetBlue, +1 more

Saturday

Delta,JetBlue,Spirit Airlines

Delta,JetBlue, +1 more

Sunday

Delta,JetBlue,Frontier, +1 more

Delta,JetBlue, +2 more

See more nonstop flights

Direct returns

San Juan Luis Munoz Marin Intl to Boston Logan Intl

Monday

Delta,JetBlue,Spirit Airlines

Delta,JetBlue, +1 more

Tuesday

Delta,JetBlue,Frontier, +1 more

Delta,JetBlue, +2 more

Wednesday

Delta,JetBlue,Spirit Airlines

Delta,JetBlue, +1 more

Thursday

Delta,JetBlue,Frontier, +1 more

Delta,JetBlue, +2 more

Friday

Delta,JetBlue,Spirit Airlines

Delta,JetBlue, +1 more

Saturday

Delta,JetBlue,Spirit Airlines

Delta,JetBlue, +1 more

Sunday

Delta,JetBlue,Frontier, +1 more

Delta,JetBlue, +2 more

See more nonstop flights

Reviews of the top 3 airlines flying from Boston to San Juan

 
See real verified KAYAK customer reviews for airlines flying from Boston to San Juan. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boston to San Juan? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
JetBlueOverall score based on 2907 reviews
7.6Comfort
7.4Boarding
8.0Crew
7.3Entertainment
6.7Food
Airline reviews

The flight was two hours late due to a computer fault and resulting maintenance. Nothing was offered as compensation beyond bottles of water during the time we were deplaned and waiting in the terminal.

2.0 MediocreAnonymous, Oct 2025FLL - DCA
Read more JetBlue reviews

The flight was two hours late due to a computer fault and resulting maintenance. Nothing was offered as compensation beyond bottles of water during the time we were deplaned and waiting in the terminal.

Very pleasant flight attendants. Gate crew rather loud chatting with each other.

Four plus hour flight delay in New York caused us to take off after 11:30pm. We didn’t arrive at our hotel until five hours after check in. Started the trip off feeling exhausted.

Plane was in bad shape. TV’s and WiFi didn’t work. Plane need a refresh. Not enough room for bags.

There was a fowl odour coming from the lavatory the entire flight

Everything was great. I liked the text updates so that I never miss a gate change & I have all the latest info.

I don’t usually fly budget airlines or airlines in the United States. It was as good as any other airline. The seats are comfortable and the airline attendants are not rude & surly. Very nice flight (s).

No internet on a flight over three hours in this age is criminal. Staff inattentive and dismissive

They have the most inexperienced / rude flight staff I’ve encountered

very difficult boarding process - aggressive passengers not the friendliest crew

the plane was not full so the flight attendant had me move to an empty row which made for a good flight. The software for logging on and booking and confirming the flight is much too cumbersome.

Always comes in handy when I want a quick weekend getaway.

For the price I could have taken a “name brand” airline. No drink no snack and constant emails trying to get addition money for EVERYTHING other airlines include in the price. It looks cheaper but it’s Judy bait and switch and emails non stop!

The gate agents for spirit at EWR wouldn’t give me my ticket to board when I arrived 50 min from the flight, saying that I wouldn’t make my flight. They tried to reschedule me to arrive at my destination 14 hours after the original flight, which included a 10 hr layover in another city. I rebooked with another airline and it took me a total of 5 min to go through security. Then I see a charge on my card for a $100 change fee that I did not approve. Beware of this horrible place and these horrible people

Excessive fees for flight delays. What a Scam. I was not able to attend the wedding I needed to go.

Waited at the airport for over 4 hours to board this flight. Terrible airline

Was supposed to take off 8:00 last night. Got delayed till 8:00 this morning

It was terrible, we had to board and unboard the flight with a hour delay that caused me to miss an appointment and a surprise for my wife

When the flight ticket is expensive and you have to purchase check in luggage and there is no snacks, no entertainment, tight seats stuffed in the back of the plane not such good experience. I would like some to reach out to me . I paid for check luggage when I bought the ticket they made me pay again on the return flight extra $70. Very frustrating.

Excellent experience when I am looking for a budget airline where the main expectation is getting me from point A to point B with no frills.

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

Boarding was on time and plane departed as scheduled. There are obviously no amenities (food, drink, entertainment) on Frontier, but there also didn't seem to be any issues with luggage space either.

Inbound plane was on time and flight departed on time with no issues while boarding.

I knew going into this that Frontier, being a low cost carrier, would be pretty bare bones and charge for most extras but this was made up for by the fact that the airplane was a reasonably new Airbus, every employee was great and best of all, Everett Washington is an amazing airport - thanks Frontier for flying there!!!

i was unable to check in the flight. refund requested

It was well done. It was my first time flying with them and I was nervous b/c I have heard of many cancelled and/or delray flights. Everything went smoothly.

Just know that everything, and I mean everything is “ala cart”. 60$ just to put something in the overhead bin. I will never fly Frontier again nor do I recommend them to anyone else.

The single worst check in experience I could imagine. I’ll never do any business with Frontier or any affiliated company

Too many extra fees, uncomfortable, little leg room. Will not recommend this airline.

Everyone seemed to be in zone 1 for boarding. Maybe break it up a little. Otherwise, smooth flight.

Everything you need to know for your flight from Boston to San Juan

Information on your arrival and departure airports

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