BOS - SJO

Find cheap flights from Boston to San José

1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San José

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to San José, 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 José, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
Multiple Airlines
Mon 15/12
BOS - SJO • multi-stop
Cheapest one-way flights
Multiple Airlines
Mon 15/12
BOS - SJO • multi-stop
When to book
2 weeks
in advance
Our data shows that travellers who book at least 2 weeks in advance save around 24% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 22% price drop
February
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to San José!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Boston to San José (BOS-SJO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to San José 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 José

Multiple Airlines Logo
BOS
-
SJO
6147 kmmulti-stop
Multiple Airlines Logo
SJO
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BOS
6147 kmmulti-stop
Multiple Airlines
Booking Insights

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

Get data-powered insights and trends into flights from Boston to San José 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 José?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to San José, 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 José is September, where tickets cost C$ 532 (return) on average. On the other hand, the most expensive months are December and April, where the average cost of round-trip tickets is C$ 945 and C$ 767 respectively.

How far in advance should I book a flight from Boston to San José?

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 José, 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 José, you should book around 2 weeks before departure, which saves you about 24% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Good to know

Low seasonOctober
Best time to beat the crowds (22% less expensive on average)
Most popular time to fly (12% more expensive on average)

When to book flights from Boston to San José

Are your dates flexible? Find out the best times to travel from Boston to San José 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 flights from Boston to San José

  • Can I find pet relief facilities at BOS?

    BOS is a pet-friendly airport offering exceptional pet relief areas for passengers traveling with their pets. You will find these pet relief areas on the "Arrivals" level curb outside each terminal. They are located post-security near Gate E7 in Terminal E, Terminal B post-security near Gate B29, and near Gate C20 past security in Terminal C. The facilities are equipped with fire hydrants and waste disposal b ags.

  • What accessibility facilities are available at San Jose Airport?

    San Jose Airport has accessible parking spaces. Passengers with an ADA placard can park in any parking lot. The airport is also equipped with wheelchair accessible restrooms and shuttles for convenient navigation throughout the airport. The wheelchairs are autonomous and are free and easy to use: the passenger selects the direction he or she wants to go on the screen, and the device will navigate to that direction independently.

  • Which family facilities are available at San Jose Airport?

    There are many family facilities that passengers traveling with the family can take advantage of in this airport. For instance, the airport features mamava pods, which offer privacy for breastfeeding mothers. They are located on the airside in both terminals.

  • Where can I sleep at San Jose Airport?

    San Jose is a relatively small airport so finding a place might be a bit of a hassle. However, you can still manage to find a place to sleep within the airport premises, you can sleep at window sills in the hallway but you need to carry an extra travel mat and a blanket. If you are landing late at SJO airport and are looking for a place to spend the night, consider making reservations at any of the multiple hotels near or within the airport.

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

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Boston to San José?

    Star Alliance is the only airline alliance operating flights between Boston and San José.

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

    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 José.

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

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

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

    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 José 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 José?

    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 José 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 José

  • Boston International Airport (BOS) is located approximately 3 miles East of downtown Boston. The airport is the major hub of Cape Air Airlines. It also serves Delta Airlines, Jetblue, American, and United Airlines. On the other hand, Juan Santamaria International Airport (SJO) is located West of San Jose 12 miles away. It is the hub of Alaska Airlines.
  • If you are traveling to San Jose and need direct flights from Boston to San Jose, you can opt for Spirit Airlines, American Airlines, or Delta Airlines. However, you can also opt for connecting flights such as Spirit Airlines with layovers at FLL.
  • While at BOS waiting to board your flight, you can take advantage of the multiple lounges within the airport. These lounges are mainly airline-operated and offer excellent amenities and services such as meals and drinks. However, these airlines have different rules and regulations so ensure that you can confirm with the airline before making any reservations.
  • Passengers who need to pick up or book car rentals at SJO will find the car rental facilities across from Terminal B of the airport. From terminal B, walk to the baggage claim area across Airport Boulevard.
  • If you are looking for particular information while at SJO, you can go to the airport information booths. They are located in each terminal near the baggage claim area.

Reviews of the top airlines flying from Boston to San José

 
See real verified KAYAK customer reviews for airlines flying from Boston to San José. 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 José? 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.
7.6
Copa AirlinesOverall score based on 1557 reviews
7.4Comfort
6.8Entertainment
6.8Food
8.1Crew
7.8Boarding
Airline reviews

Very strict carry on rules meant most of the plane had to gate check their luggage. As is often the case had things that were broken because of this, but I appreciated not being charged to gate check. Otherwise good flight and great crew once on the plane

6.0 GoodZach, Oct 2025
DEN - PTY
Read more Copa Airlines reviews

Very strict carry on rules meant most of the plane had to gate check their luggage. As is often the case had things that were broken because of this, but I appreciated not being charged to gate check. Otherwise good flight and great crew once on the plane

Some of the Air hostesses are not that friendly. Need improvement

I liked the meatloaf the chicken was awful but the plane was on time and got there and the staff was nice.

They were super friendly bumped me up to exit row free of charge, All flight legs were on time

Boarding was quick & efficient; they gave boarding groups due priority; staff & air crew were very cordial and helpful, pleasant flight.

We had a great flight just wished they had a tv so we can see a movie that would of made my trip excellent.

Great experience with a crew always thinking in the passenger

I selected first class expecting excetional service. It was mediocre at best. The food service was cold, meal choices was poor and on one leg they did provide dessert. I did enjoy the lay day seat but the movies were old and nothing current. Boarding the plane is always hot. So boarding is quite warm until your in the air. I took a small personal air fan. Update the meals and movies.

Very happy with my flight. I would definitely recommend it.

Did upgrade, travel in business it was great (more room I could sleep)

Flight was in time, very smooth ride and surprisingly lots of legroom in the cabin so I certainly will fly with spirit again

The seats are the most uncomfortable seats I’ve ever sat in. Don’t believe I’ll ever fly spirit again!!

Flight was canceled and instead of rescheduling at the gate we had to go out to the ticket counter. Unruly kids kicking the back of my rows chair with staff to inattentive to say something.

Customer feedback I sent to Spirited today: “I will never fly Spirit Airlines again and will work hard to convince my friends and family to boycott/avoid Spirit Airlines at all costs. I booked three seats for me and my 8 and 10 year old children on NK 1222 from Orlando to Kansas City for 12/7/25 leaving Orlando at 10:37AM. This itinerary was abandoned by Spirit and we were rebooked onto Spirit flight NK 213 leaving at 9:06PM without any notice. Then the nightmare really began. Flight 213 was delayed a total of 12 times, finally leaving at 6:35AM the following day. The gate was changed 5 times and our electronic boarding passes were invalidated at midnight. The worst part was that the 12 separate delays were incremental making it impossible to plan for accommodations for my family. My kids missed a day of school and barely slept under the harsh lights with lots of noise on the filthy airport floor. The customer service agent at Spirit Airlines told us we would be emailed a voucher for a hotel which never happened. I asked about it multiple times and it never arrived in my email inbox. This whole unfortunate situation could’ve been avoided if spirit had taken a realistic approach and delayed the flight from 9 PM until 6 AM from the beginning. My son gleefully deleted the Spirit app from my phone once we landed and we will never fly with Spirit again.”

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

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

Information on your arrival and departure airports