BOS - EAS

$261 Find Cheap Flights from Boston to San Sebastian

1 adult
1 adult, Economy

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to San Sebastian, 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 Sebastian, as well as popular online travel agencies
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Booking Insights

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

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

What is the most popular layover airport when flying from Boston to San Sebastian?

Percentage of 1-stop round-trip flights from Boston to San Sebastian chosen by KAYAK users via each layover airport in the last 12 months (only includes trips with the same layover airport on both legs).

Madrid (MAD) is the top choice – 94% of KAYAK users who clicked on 1-stop flights from Boston to San Sebastian picked an itinerary connecting there.

What is the cheapest layover airport when flying from Boston to San Sebastian?

Average round-trip price for 1-stop flights from Boston to San Sebastian clicked by KAYAK users in the last 12 months (only includes trips with the same layover airport on both legs).

Flights via Barcelona (BCN) offer the most affordable fares, with an average round-trip price of $622.

Which layover airport offers the shortest total travel time from Boston to San Sebastian?

Shortest average total travel time for 1-stop one-way flights from Boston to San Sebastian via different layover airports, based on KAYAK user data from the last 12 months.

Consider flying via Madrid (MAD) for the shortest journey. The average one-way travel time for flights connecting there is 10h 17m.

Which layover airport has the quickest connection when flying from Boston to San Sebastian?

Average layover duration at different layover airports for 1-stop one-way flights from Boston to San Sebastian, based on KAYAK user data from the last 12 months.

If you prefer a quick connection, Madrid (MAD) often has the shortest layovers from Boston to San Sebastian, with an average of 2h 17m.

Good to know

Low seasonMay
Cheapest flight$261
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly with an average 25% increase in price.
Flight from Boston to San Sebastian

When to book flights from Boston to San Sebastian

Are your dates flexible? Find out the best times to travel from Boston to San Sebastian 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.

Reviews of the top airlines flying from Boston to San Sebastian

 
See real verified KAYAK customer reviews for airlines flying from Boston to San Sebastian. 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 Sebastian? 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
American AirlinesOverall score based on 10000 reviews
6.5Food
8.0Crew
7.2Comfort
7.5Boarding
6.9Entertainment
Airline reviews

The flight was canceled 3 hours after original take off time

2.0 MediocreAnonymous, Aug 2025PHL - LHR
Read more American Airlines reviews

The flight was canceled 3 hours after original take off time

My flight was delayed for several hours. Sitting at gate 16 for several hours, I got a text from Kayak the gate changed to 9 before it was announced. Very bad communication at each gate from American Airlines employees. I received 10 notifications of delay from Kayak. My vacation started off horrible! I will write to American Airlines corporate office also.

The AA staff person who checked our bags was curt and almost rude. The FA also seemed unhappy doing her job. Overall it was like riding the school bus back in grade school.

Internet was a bit expensive and did not work ask that week otherwise a good flight

Ring in first class for an overnight flight, there was no blankets nor pillows for first class customers.

My Internet did not work for Outlook email or basically anything. I paid for one hour of in-flight usage and it was terrible. I spent a lot of time on different sites and browsers with no luck and a lot of frustration. Other than that, the flight was on time, crew was nice, service was fine. Seat was OK even though I paid for the extra 6 inches. I cannot imagine how tight the seats in the back must be.

Delayed flight that lead to a missed connection and a 5-hour trip became a 12-hour flight 🙄

Any flight to ORD after about 2pm this summer has been challenging. Flight was delayed getting in (coming from ORD) and that led to it not leaving before a ground stop due to lightening before they could fuel the plane, and so forth. They made up some time but we were still late in arriving at ORD, and that led to missed connections.

Food was ok, but not as good as I have had before on AA.

No issues. They did change our gate FOUR times in about 30 minutes which was mildly annoying but the flight was fine.

The flight was great; I don't see any area of improvement.

The crew were not very personable. The crew did not serve tea or coffee. The bathroom was not kept clean. Two out of the 5 toilets in the cabin weren't working.

Delayed first flight Geneva Madrid.. We didn’t miss our 2nd flight only because the 2nd flight Madrid Dallas was 1h delayed. However we did end up missing the 3rd leg Dallas Austin. Luggage didn’t show up in Dallas. So we re missing 2 suit cases. Customer service sent us to a hotel in Dallas. Only one room booked for 5!! Pretty bad experience overall. I won’t book a flight on Iberia in the future

Crew was excellent, great customer service, checked luggage took 1 hour and a half to come out at the baggage claim, the only negative thing about the flight.

Horrible experience airline crew was unprofessional. Flight was delayed. Suit cases did not arrive. Never flying iberia again

People point to America as the model of late stage capitalism. My friends, airlines in america at least give you WiFi, and they haven’t quite smashed people into cardboard tv dinner trays yet. Iberia has mastered the tv dinner seat and WiFi is 20 euros. Be serious yall.

Iberia lost my bag, said they found it in another country, said they sent it to me, but never did. Went my whole trip without my stuff, but expecting it to show up because that’s what they said would happen. Their communication sucks, their website sucks, and to top it all off, their seats are small and uncomfortable. They’re bad at their jobs and they should feel bad about themselves. Do not even get me started on the flight home. AVOID!

The flight was delayed over 4 hours. Business class is just slightly upgraded economy.

Delayed and missed connections on leaving the states and returning Planes were old and small- very uncomfortable. Meals were good but very infrequent service for even water/drinks. No explanations for 3+ hour delay

Boarding on the buses isn’t efficient. Overall, it was great.

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

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