BOS - EAS

$340 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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Everything you should know

Cheapest round-trip
$682
Typical prices: $1,407-$839
Iberia
Sun 7/26Tue 8/11
BOS - EAS • 1 stop
Cheapest one-way
$340
LEVEL
Sun 7/26
BOS - EAS • 1 stop
Top airlines
Cheapest • from $616 (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 $915 (round-trip)
Shortest trip • 11h 04m (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

Sun, Jul 26 - Tue, Aug 11
Iberia Logo
11:35 pm - 5:20 pm
BOS
-
EAS
11h 45m
1 stop
Iberia Logo
5:55 pm - 9:05 pm
EAS
-
BOS
33h 10m
1 stop
$682Iberia
Mon, May 4 - Tue, May 19
Iberia Logo
10:50 pm - 8:20 am
BOS
-
EAS
27h 30m
1 stop
Iberia Logo
5:55 pm - 9:05 pm
EAS
-
BOS
33h 10m
1 stop
$765Iberia
Mon, May 4 - Tue, May 19
Multiple Airlines Logo
11:00 pm - 10:35 am
BOS
-
EAS
53h 35m
2 stops
Multiple Airlines Logo
8:55 am - 9:05 pm
EAS
-
BOS
18h 10m
1 stop
$808Multiple Airlines
Sun, Jul 5 - Sat, Jul 11
Multiple Airlines Logo
11:35 pm - 8:20 am
BOS
-
EAS
26h 45m
1 stop
Multiple Airlines Logo
9:30 pm - 9:45 pm
EAS
-
BOS
30h 15m
2 stops
$884Multiple Airlines
Tue, May 26 - Sat, May 30
Iberia Logo
10:50 pm - 8:35 am
BOS
-
EAS
27h 45m
1 stop
Iberia Logo
8:55 am - 9:05 pm
EAS
-
BOS
18h 10m
1 stop
$885Iberia
Sun, May 3 - Mon, May 11
Iberia Logo
9:20 pm - 1:00 pm
BOS
-
EAS
9h 40m
1 stop
Iberia Logo
9:30 pm - 7:25 pm
EAS
-
BOS
27h 55m
1 stop
$894Iberia
Sat, May 30 - Wed, Jun 24
Multiple Airlines Logo
10:50 pm - 8:20 am
BOS
-
EAS
27h 30m
1 stop
Multiple Airlines Logo
9:30 pm - 8:55 pm
EAS
-
BOS
29h 25m
2 stops
$922Multiple Airlines
Sat, May 30 - Thu, Jun 25
Multiple Airlines Logo
10:50 pm - 8:20 am
BOS
-
EAS
27h 30m
1 stop
Multiple Airlines Logo
9:30 pm - 8:55 pm
EAS
-
BOS
29h 25m
2 stops
$924Multiple Airlines
Thu, May 7 - Mon, May 11
Iberia Logo
11:34 am - 1:00 pm
BOS
-
EAS
19h 26m
2 stops
Iberia Logo
9:30 pm - 6:48 pm
EAS
-
BOS
27h 18m
2 stops
$936Iberia
Thu, May 7 - Mon, May 11
Iberia Logo
11:34 am - 8:40 am
BOS
-
EAS
15h 06m
2 stops
Iberia Logo
9:30 pm - 7:25 pm
EAS
-
BOS
27h 55m
1 stop
$942Iberia
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 July.

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$340
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 $340 for a one-way ticket and $616 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 $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 11682 reviews
7.5Boarding
7.9Crew
6.9Entertainment
7.2Comfort
6.4Food
Airline reviews

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

10.0 ExcellentStan, Apr 2026
LAX - PHL
Read more American Airlines reviews

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

I would like a refund for the extra cost the seat I paid for. An oversized person sat next to me and I couldn’t fit on my seat and had to move to another seat.

Boarding gate at LAX was too crowded—two gates next to one another

The flight was delayed about an hour for a maintenance specialist to approve the maintenance repair

Early departure meant on time arrival. Only real problem was free internet had issues, although chatting with the internet help desk (you can do this via aainflight.com) got the issue resolved.

The seat was quite comfortable. The recline was enough that I could sleep a little. The crew was professional and good.

I’m sure Business Class would be excellent. I feel like I got what I paid for. Overall it was good and well worth it. I would do it again.

The staff and service on American Airlines were truly outstanding. I had requested wheelchair assistance for my mother due to her knee issues, and the team went above and beyond every step of the way—from boarding in Boston to our arrival in Chicago. Their care, professionalism, and attentiveness made the entire experience smooth and stress-free. I’m very grateful for the support they provided.

Found that the plane used for this short flight is smaller and therefore the seats are really squeezed tight.

Tv screens and movie selection v good. Friendly staff. They were really worried about max capacity and room for carryons. That is never fun but i had no problem finding space when I boarded.

Service was good , communication and emails were in Spanish though I booked in English , end up figuring it out but also flight was partnered with air maroc and I had to call them to check on not Iberea doesn’t make sense

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.

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

Information on your arrival and departure airports