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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Everything you should know

Cheapest round-trip
Multiple Airlines
Thu 11/12
BOS - SJU • multi-stop
Cheapest one-way flights
Multiple Airlines
Thu 11/12
BOS - SJU • multi-stop
Our travellers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
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 12% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 20% price drop
February
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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!
Flight Deals
Booking Insights
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
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4346 kmmulti-stop
Multiple Airlines Logo
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BOS
4346 kmmulti-stop
Multiple Airlines
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$ 336 (return) on average. On the other hand, the most expensive months are December and November, where the average cost of round-trip tickets is C$ 537 and C$ 500 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 12% 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

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
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.

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.

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 (7% less expensive on average)
Most popular time to fly and prices are also 4% 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$ 390 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$ 237 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.

KAYAK’s top tips for finding a cheap flight from Boston to San Juan Luis Munoz Marin Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 188 or less one-way and C$ 171 or less round-trip.

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, +1 more

Delta,JetBlue, +2 more

Tuesday

Delta,Frontier,JetBlue, +1 more

Delta,Frontier, +2 more

Wednesday

Delta,JetBlue,Spirit Airlines

Delta,JetBlue, +1 more

Thursday

Delta,Frontier,JetBlue, +1 more

Delta,Frontier, +2 more

Friday

Delta,JetBlue,Spirit Airlines, +1 more

Delta,JetBlue, +2 more

Saturday

Delta,JetBlue,Spirit Airlines, +1 more

Delta,JetBlue, +2 more

Sunday

Delta,Frontier,JetBlue, +1 more

Delta,Frontier, +2 more

See more nonstop flights

Direct returns

San Juan Luis Munoz Marin Intl to Boston Logan Intl

Monday

Delta,JetBlue,Spirit Airlines, +1 more

Delta,JetBlue, +2 more

Tuesday

Delta,Frontier,JetBlue, +1 more

Delta,Frontier, +2 more

Wednesday

Delta,JetBlue,Spirit Airlines

Delta,JetBlue, +1 more

Thursday

Delta,Frontier,JetBlue, +1 more

Delta,Frontier, +2 more

Friday

Delta,JetBlue,Spirit Airlines, +1 more

Delta,JetBlue, +2 more

Saturday

Delta,JetBlue,Spirit Airlines, +1 more

Delta,JetBlue, +2 more

Sunday

Delta,Frontier,JetBlue, +1 more

Delta,Frontier, +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 2898 reviews
7.6Comfort
8.0Crew
7.4Boarding
6.7Food
7.2Entertainment
Airline reviews

The ride share experience in JFK is terrible. After traveling on a flight, then you need to take a subway to the last stop to get an uber or lyft. Unacceptable. Bad job JetBlue for permitting JFK and Port Authority to do this to your passengers.

10.0 ExcellentJeff, Nov 2025
BOS - JFK
Read more JetBlue reviews

The ride share experience in JFK is terrible. After traveling on a flight, then you need to take a subway to the last stop to get an uber or lyft. Unacceptable. Bad job JetBlue for permitting JFK and Port Authority to do this to your passengers.

Checking In on JetBlue site was impossible. It hung up on REAL ID. Even my Global Entry did not help. Luckily, on Kayak site it was a breeze. Entire flight the temperature was COLD! Otherwise the crew was great!

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

Honestly horrible. The plane on the way back was delayed 6 times with no explanation on why. When I asked for a refund or some money back because I had to miss a day of work because of the desk, they told me no. Because of how poorly it was handled I will most likely never take spirit again

I love a flight without turbulence and you guys deliver It’d be nice to have comfier seats and maybe some inflight entertainment and snacks but that’s for Delta

30 minute delay, Also there was a medical emergency on the flight. The flight crew was on top of the situation and assisted the medical professionals that happened to be on the flight.

This was my first time on a budget airline and I couldn't even sit down all the way because my knees would embed in the seat in front of me. I'm only 6' tall with a 32" inseam. There's no upside other than y'all are cheap. I'm glad it was only a 2 hour flight. Lesson learned! I get why everybody talks down on budget airlines. The staff was outstanding, the flight went as well as possible, great pilot, great boarding, smooth sailing. Zero chance I'll be back though.

Everything was smoothly and convenient! Just stay in this way!

Cancelled my flight and the earliest that they are willing give me for the next flight which was 3 days later on a weekday. Only accommodation they are willing to give was $30 airline credit that will expire in 1 year

Terrible Airline I will never fly that airline again. Shame on you for recommending them.

Flight was canceled, huge lines to get baggage returned. Most other airlines had delays but not widespread cancellations like Spirit.

never ever fly spirit airlines you will be screwed in the end

I didn't eat, so I can't rate the food. Delayed set off was beyond

Not clean and was told I would get a great seat and it was not great at all

Flight got delayed for 5 hours no good explanation was offered ;(

Horrible. I would never fly Frontier again. The booking process is tricky at best, but fraudulent in my opinion. Frontier customer service did nothing to rectify my purchase -- I ended up paying more than double what I could have gotten from other airlines and nearly triple what I thought I was buying from Frontier. Their booking practices are unfair to the consumer.

Delayed. Text notifications were slow. Not much information o what was happening. Boarding was slow and confusing. Wasn’t even offered water other flight. Had to ask. No entertainment at all. Felt like.a Greyhound bus.

When I wanted to check in 3 hours prior to boarding time, the employees mentioned “a little over an hour delay” so I waited for an hour then I went to go look for food in the terminal and most people from that flight were in the same area looking for food. Finally I decided after food to check to see if it’s anytime closer and now it’s 2 mins until boarding closes?! What are you kidding me? I didn’t receive anything via sms about boarding now nor via email or on the intercom. I luckily made it through, barely, and then there’s no room for my carry on mind you I’m in the very first row so I had to place my purse in one further row back and my carry on sections down. Not sure who pays for better seats to get your stuff placed all over the plane but that was the worst experience I’ve ever had flying with anyone.

Better than expected. Staff were friendly and nice on both flights.

There was no one at the counter to assist with our check in. The app didn’t work, so I arrived at the airport with time to check in and I couldn’t because no employees were there. When I finally got someone on the phone, it was inside the 60min rule and they said I could no longer check in and they could sell me another ticket. We had to scramble and pay an additional $800 for tickets and THEN AFTER (about 60 min from my original convo with customer service and 10min after original departure time) I had boarded my new flight, there was email saying my original flight from Frontier was delayed and leaving 2hr 50min later, but I STILL wouldn’t have been able to check in. Which means customer service should have been able to see it and let me check in because I was well within my check in time. When I call Frontier, they hang up on me. So their app didn’t work and they employees left and they take zero responsibility or assistance with their “customer service”

Terrible. Flight cancelled with no reasoning and no flights to rebook. Employees were useless and did nothing to help. Did not even know where to retrieve luggage from the cancelled flight. Flyers beware.

No fault of Frontier staff: plane was very late, reached Orlando at 1 am, took a while to get luggage. Weather, gov financial shutdown impact on TSA, air controllers seemed to have multiple flights backed up. Frontier staff seemed to cope as gracefully as possible. It did reassure me that I and my new hip could adapt to travel challenges. Food/entertainment were irrelevant to my trip.

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

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

Information on your arrival and departure airports