BOS - EAS

$326 Find Cheap Flights from Boston to San Sebastian

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to San Sebastian departing on 3/23. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$509
Overall average: $786
Multiple Airlines
Mon 4/13Mon 4/20
BOS - EAS • 2 stops
Cheapest one-way
$326
Multiple Airlines
Mon 3/23
BOS - EAS • 3 stops
Top airlines
Iberia
Cheapest • from $569 (round-trip)
American Airlines
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Boston and San Sebastian. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Barcelona (BCN)
Cheapest • Avg $595 (round-trip)
Madrid (MAD)
Shortest trip • 10h 53m (one-way)
Insights
Insights
Insights
Insights
When to travel
November
Cheapest • 34% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Sebastian!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Boston to San Sebastian (BOS-EAS)

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

Mon, Apr 13 - Mon, Apr 20
Multiple Airlines Logo
11:34 am - 8:40 am
BOS
-
EAS
15h 06m
2 stops
Multiple Airlines Logo
9:30 pm - 7:50 pm
EAS
-
BOS
28h 20m
1 stop
$509Multiple Airlines
Mon, Apr 13 - Mon, Apr 20
Multiple Airlines Logo
9:20 pm - 8:40 am
BOS
-
EAS
29h 20m
1 stop
Multiple Airlines Logo
9:30 pm - 7:50 pm
EAS
-
BOS
28h 20m
1 stop
$510Multiple Airlines
Fri, May 1 - Mon, May 4
Iberia Logo
9:20 pm - 8:50 pm
BOS
-
EAS
17h 30m
1 stop
Iberia Logo
9:30 pm - 7:09 pm
EAS
-
BOS
27h 39m
2 stops
$569Iberia
Fri, May 1 - Mon, May 4
Iberia Logo
9:20 pm - 8:50 pm
BOS
-
EAS
17h 30m
1 stop
Iberia Logo
1:40 pm - 7:50 pm
EAS
-
BOS
12h 10m
1 stop
$576Iberia
Mon, Apr 13 - Mon, Apr 20
Multiple Airlines Logo
6:05 pm - 8:50 pm
BOS
-
EAS
20h 45m
2 stops
Multiple Airlines Logo
1:40 pm - 8:20 pm
EAS
-
BOS
36h 40m
2 stops
$693Multiple Airlines
Wed, Jul 15 - Thu, Jul 23
Iberia Logo
5:40 pm - 1:00 pm
BOS
-
EAS
13h 20m
1 stop
Iberia Logo
9:30 pm - 4:10 pm
EAS
-
BOS
24h 40m
1 stop
$718Iberia
Wed, Jun 10 - Mon, Jun 15
Iberia Logo
12:03 pm - 8:40 am
BOS
-
EAS
14h 37m
2 stops
Iberia Logo
9:30 pm - 4:10 pm
EAS
-
BOS
24h 40m
1 stop
$722Iberia
Fri, May 1 - Mon, May 4
Iberia Logo
3:17 pm - 1:00 pm
BOS
-
EAS
15h 43m
2 stops
Iberia Logo
1:40 pm - 11:52 pm
EAS
-
BOS
16h 12m
2 stops
$766Iberia
Wed, Jul 15 - Thu, Jul 23
American Airlines Logo
11:20 am - 8:40 am
BOS
-
EAS
15h 20m
2 stops
American Airlines Logo
9:20 am - 7:50 pm
EAS
-
BOS
16h 30m
1 stop
$778American Airlines
Fri, Apr 10 - Fri, Apr 17
Multiple Airlines Logo
10:50 pm - 8:40 am
BOS
-
EAS
27h 50m
2 stops
Multiple Airlines Logo
1:40 pm - 7:50 pm
EAS
-
BOS
12h 10m
1 stop
$811Multiple Airlines
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 cheapest month to fly from Boston to San Sebastian?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to San Sebastian, 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 Sebastian is November, where tickets cost $517 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,211 and $970 respectively.

Good to know

Low seasonJanuary
Cheapest flight$326
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly and prices are also 12% lower on average.
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.

FAQs for booking flights from Boston to San Sebastian

  • What is the cheapest flight from Boston to San Sebastian?

    In the last 3 days, the lowest price for a flight from Boston to San Sebastian was $326 for a one-way ticket and $509 for a round-trip.

  • Do I need a passport to fly between Boston and San Sebastian?

    Yes

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

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

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

    oneworld is the only airline alliance operating flights between Boston and San Sebastian.

  • Which is the best airline for flights from Boston to San Sebastian, American Airlines or Iberia?

    The two airlines most popular with KAYAK users for flights from Boston to San Sebastian are American Airlines and Iberia. With an average price for the route of $864 and an overall rating of 7.1, American Airlines is the most popular choice. Iberia is also a great choice for the route, with an average price of $766 and an overall rating of 7.0.

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

    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 Sebastian.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Sebastian 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 Sebastian?

    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 Sebastian with an airline and back to Boston with another airline. Booking your flights between Boston and EAS can sometimes prove cheaper using this method.

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

    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 Sebastian from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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.
7.1
American AirlinesOverall score based on 11370 reviews
7.2Comfort
6.4Food
6.9Entertainment
7.5Boarding
8.0Crew
Airline reviews

It was an older plane. First Class was not especially roomy or comfortable. It was a short flight so there were no meal but they did offer mixed nuts which used to be normal but now is rare. Crew member was very polite and professional.

6.0 GoodIrene, Mar 2026
ORD - SDF
Read more American Airlines reviews

It was an older plane. First Class was not especially roomy or comfortable. It was a short flight so there were no meal but they did offer mixed nuts which used to be normal but now is rare. Crew member was very polite and professional.

The chicken wrap was tiny ($13 for what looked like a 1/3 of a normal wrap?) and disgusting.

It was a train wreck but on an airplane. First off, flight was delayed then we board only to hear two announcements, First weather delays in Orlando and second backup battery warning on emergency lights. After sitting on the plane for almost 2 hours they have us deplane due to the maintenance issue. We were told they were getting another plane. In the mean time, I notice another American- Orlando flight and ask the gate agent if I can switch. He says he cant help me and I'd have to walk to A13 from A37. Really!? I get down there and get a seat only to get an announcement my original flight was RE-boarding. The Then inflight there's no communication and I notice on flightaware were circling over the Gulf of America. I call the flight attendant and of course she has no clue and apparently 5m later the pilot finally tells us about another delay. Why does American always have these service and delay issues? They are my LAST choice in flights now!

Mediocre would be best description. Food bland. Seat biz class uncomfortable to sleep. Crew never dimmed lights completely in an overnight flight to Europe. Would avoid AA if possible.

For my arriving destination, we were delayed multiple times to the point that we arrived 6 hours after we were originally scheduled. On my flight home, they overbooked and involuntarily removed passengers (including me) from the plane. It was not a good experience.

It was good experience this time. The flight was on time.

I very rarely fly American and my experience today reenforces that is the correct decision. While the staff were all very courteous, our flight was first thing in the morning so there was no reason to be delayed, yet appropriate maintenance checks weren’t completed prior to our flight so we were delayed multiple times. Not a great showing, American Airlines.

It's very confusing because Kayak has it as American Airlines, but it was Hawaiian Airlines, but operated by Alaska Airlines. I had to go to the airport for my boarding pass because American said I didn't have any trips.

Smooth flight. From the early boarding and all were on board before departure time and arrived early in ONT. Great crew. Thank you!!!!

Small plane, poor meal choices for first class, bad terminal and boarding experience at LAX

Awful. They didn't even show concern that her connecting flight( Dallas to Mardrid) was gone/missing. I don't understand how that is even possible. Rudest answer from one of the crew was that American Airlines sold the tickets to somebody else. My daughter was not in the list.

The flight was canceled on a Thursday last minute. I lost thousands of dollars in hotels and car rental

Excellent lie flat seat for premium economy! Great staff. Bad food . Not so great entertainment. My bag didn’t make it either.

Really like the idea experience on this airline I will use again

The pilot was professional and very good. The flight crew, very young and often looked flustered and overwhelmed. The seats were among the most uncomfortable in the air. The boarding somewhat chaotic. The price reasonable. Overall it was an average budget airline experience...although Iberia is not a budget airline. I fear if Iberia doesn't up it's game customers like us will go elsewhere.

Bad weather Excelent pilot Spoke British 😆on time seats small ad expected in a discount airline

It wasn’t great because the third-party from Kayak there was just no information about how to check in with Vueling. And the purchase of the ticket from under pricer just made everything really difficult. I’m unlikely to use Kayak again for these reasons.

It was fine, older plane with limited entertainment, otherwise fine.

the seats were bad and uncomfortable and the food was not tasty.

the seats were so cramped you could barely move. it was difficult to eat when passengers would recline their seats. the seats were so flimsy and unstable that whenever someone got in and out of their seat, it bounced like a spring back in your face. the movies were nice. the food was terrible. even though the conditions were terrible, they tried to pressure passengers to relocate their seats to accommodate adults who were related and wanted to sit next to each other, even after the passengers expressed that they did not want to move for that purpose. on the connecting flight, the “service” consisted of items for purchase. even though the flight was only 45 minutes, once again passengers (including me) were pressured to relocate for people to sit next to each other. they couldn’t be apart for 45 minutes? this was much less compelling than being apart for an 8 hour flight.

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

Information on your arrival and departure airports