BOS - EAS

$333 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 7/26. 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
$551
Typical prices: $774-$522
LEVEL
Fri 5/1Sat 5/16
BOS - EAS • 1 stop
Cheapest one-way
$333
LEVEL
Sun 7/26
BOS - EAS • 1 stop
Top airlines
Cheapest • from $551 (round-trip)
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
Cheapest • Avg $920 (round-trip)
Shortest trip • 11h 03m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 38% price drop
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

Fri, May 1 - Sat, May 16
LEVEL Logo
10:50 pm - 8:20 am
BOS
-
EAS
27h 30m
1 stop
LEVEL Logo
8:55 am - 9:05 pm
EAS
-
BOS
18h 10m
1 stop
$551LEVEL
Wed, Aug 12 - Sun, Aug 23
LEVEL Logo
11:00 pm - 8:20 am
BOS
-
EAS
27h 20m
1 stop
LEVEL Logo
8:55 am - 10:05 pm
EAS
-
BOS
19h 10m
1 stop
$671LEVEL
Tue, Sep 15 - Tue, Sep 22
Multiple Airlines Logo
11:00 pm - 5:20 pm
BOS
-
EAS
12h 20m
1 stop
Multiple Airlines Logo
8:55 am - 9:15 pm
EAS
-
BOS
18h 20m
1 stop
$703Multiple Airlines
Fri, May 1 - Sat, May 16
Multiple Airlines Logo
10:50 pm - 8:50 pm
BOS
-
EAS
16h 00m
2 stops
Multiple Airlines Logo
8:55 am - 9:05 pm
EAS
-
BOS
18h 10m
1 stop
$711Multiple Airlines
Tue, Aug 25 - Mon, Aug 31
Multiple Airlines Logo
11:00 pm - 5:20 pm
BOS
-
EAS
12h 20m
1 stop
Multiple Airlines Logo
8:55 am - 9:15 pm
EAS
-
BOS
18h 20m
1 stop
$798Multiple Airlines
Mon, Aug 10 - Sun, Aug 30
Multiple Airlines Logo
5:40 pm - 1:00 pm
BOS
-
EAS
13h 20m
1 stop
Multiple Airlines Logo
8:55 am - 10:05 pm
EAS
-
BOS
19h 10m
1 stop
$804Multiple Airlines
Sat, Aug 15 - Mon, Aug 31
Multiple Airlines Logo
5:40 pm - 8:40 am
BOS
-
EAS
33h 00m
1 stop
Multiple Airlines Logo
8:55 am - 9:15 pm
EAS
-
BOS
18h 20m
1 stop
$840Multiple Airlines
Wed, Jul 29 - Wed, Aug 12
Iberia Logo
11:00 pm - 8:20 am
BOS
-
EAS
27h 20m
1 stop
Iberia Logo
8:55 am - 9:15 pm
EAS
-
BOS
18h 20m
1 stop
$842Iberia
Thu, Jun 4 - Fri, Jun 12
Multiple Airlines Logo
4:45 pm - 8:20 am
BOS
-
EAS
33h 35m
3 stops
Multiple Airlines Logo
8:55 am - 2:45 pm
EAS
-
BOS
35h 50m
3 stops
$849Multiple Airlines
Fri, Aug 14 - Mon, Aug 31
Multiple Airlines Logo
9:20 pm - 8:50 pm
BOS
-
EAS
17h 30m
1 stop
Multiple Airlines Logo
8:55 am - 9:15 pm
EAS
-
BOS
18h 20m
1 stop
$864Multiple 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.

How much is a round-trip flight from Boston to San Sebastian?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Boston to San Sebastian departing in May.

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 July and December, where the average cost of round-trip tickets is $1,554 and $1,211 respectively.

Good to know

Low seasonJanuary
Cheapest flight$333
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 16% 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 $333 for a one-way ticket and $551 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 $768 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 $765 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 11600 reviews
6.9Entertainment
7.2Comfort
7.9Crew
7.5Boarding
6.4Food
Airline reviews

The seat was comfortable, the attendants were very nice and WiFi made my life so much easier with work. Kudos!

10.0 ExcellentMadhujit, Apr 2026
DFW - CLE
Read more American Airlines reviews

The seat was comfortable, the attendants were very nice and WiFi made my life so much easier with work. Kudos!

Flight was 3 hours delayed. They gave our plan to two other routes. Need to knock that off.

To have arrived on time and not 3 hours late after having already spent $100 to change to an earlier flight, only to arrive back home close to the original flight time.

No gate in Rome. Had stairs. Got separated from my wife in a wheel chair. Customs was a zoo. If AA doesnt have landing rights, it should be advertised.

I almost missed my flight and they helped me out enormously

Business class was very good, one of my best flights

The "on the ground" A/C was not working. It was so hot while waiting to get in the air, a passenger from the rear of the plan declared "I just can't!" and waited in the gangway until time to close the doors. It was miserable. But the crew were champs and had an amazing attitude. I know they were as miserable as we were but didn't let that affect their performance.

The captain announced to the cabin there would be a delay because they observed a "cut" on a tire during precheck that needed to be cleared by maintenance. We were delayed during this inspection and allowed to proceed after maintenance "measured the cut and decided it was acceptable". My complaint is not about the delay or due diligence. I wish the captain had been more generic when making his announcement. I was a nervous wreck all the way to Charlotte worried that we would have a blowout when landing!

The SFO Lounge crew were amazing. The bartender Faris was great. Thanks!

The flight was on time and the landing was very smooth. The crew and flight attendants were all very friendly and professional.

In general, I've had excellent experiences with Iberia flights and will continue to use them. In this last flight there were two things that didn't go right. I didn't get the kosher meal I had pre-requested when I had checked in on-line. Things worked out OK as we ended up eating the fish and vegetarian choices, which were really good. The other issue was that some movies for me and my wife started fine but after 8-12 minutes the content just switched to something else. The flight attendant reset our entertainment systems, but the problem persisted. We ended up choosing other movies/TV shows that did work fine.

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.

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

Information on your arrival and departure airports