BOS - EAS

$443 Find Cheap Flights from Boston to San Sebastian

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to San Sebastian departing on 1/11. 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
$443
Overall average: $826
Iberia
Sun 1/11Tue 1/27
BOS - EAS • 1 stop
Cheapest one-way
Multiple Airlines
Sun 12/28
BOS - EAS • multi-stop
Top airlines
Iberia
Cheapest • from $443 (round-trip)
American Airlines
Best reviews • 7.2 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
November
Cheapest • 36% price drop
June
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, Jan 11 - Tue, Jan 27
Iberia Logo
9:20 pm - 8:50 pm
BOS
-
EAS
17h 30m1 stop
Iberia Logo
9:20 am - 7:33 pm
EAS
-
BOS
16h 13m2 stops
$443Iberia
Sun, Jan 11 - Tue, Jan 27
American Airlines Logo
12:16 pm - 8:40 am
BOS
-
EAS
14h 24m2 stops
American Airlines Logo
9:20 am - 7:33 pm
EAS
-
BOS
16h 13m2 stops
$479American Airlines
Wed, Feb 11 - Wed, Feb 18
Iberia Logo
4:45 pm - 8:40 am
BOS
-
EAS
9h 55m1 stop
Iberia Logo
1:40 pm - 7:50 pm
EAS
-
BOS
12h 10m1 stop
$498Iberia
Wed, Feb 11 - Wed, Feb 18
American Airlines Logo
12:16 pm - 8:40 am
BOS
-
EAS
14h 24m2 stops
American Airlines Logo
9:20 am - 7:50 pm
EAS
-
BOS
16h 30m1 stop
$512American Airlines
Wed, Feb 11 - Wed, Feb 18
American Airlines Logo
12:16 pm - 8:40 am
BOS
-
EAS
14h 24m2 stops
American Airlines Logo
9:20 am - 11:20 pm
EAS
-
BOS
20h 00m2 stops
$522American Airlines
Sun, Jan 11 - Tue, Jan 27
American Airlines Logo
9:20 pm - 8:50 pm
BOS
-
EAS
17h 30m1 stop
American Airlines Logo
9:20 am - 3:15 pm
EAS
-
BOS
11h 55m1 stop
$609American Airlines
Tue, Mar 10 - Sat, Mar 21
Iberia Logo
5:45 pm - 8:40 am
BOS
-
EAS
9h 55m1 stop
Iberia Logo
2:05 pm - 9:55 pm
EAS
-
BOS
12h 50m1 stop
$630Iberia
Tue, Mar 10 - Sat, Mar 21
Multiple Airlines Logo
5:45 pm - 8:40 am
BOS
-
EAS
9h 55m1 stop
Multiple Airlines Logo
1:40 pm - 11:19 pm
EAS
-
BOS
14h 39m2 stops
$643Multiple Airlines
Wed, Feb 25 - Sun, Mar 1
Iberia Logo
9:20 pm - 1:00 pm
BOS
-
EAS
9h 40m1 stop
Iberia Logo
1:40 pm - 7:50 pm
EAS
-
BOS
12h 10m1 stop
$726Iberia
Wed, Jan 28 - Sun, Feb 1
Iberia Logo
5:10 pm - 1:00 pm
BOS
-
EAS
13h 50m2 stops
Iberia Logo
9:20 am - 7:50 pm
EAS
-
BOS
16h 30m1 stop
$730Iberia
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 $1,064 respectively.

Good to know

Low seasonJanuary
Cheapest flight$443
Best time to beat the crowds but there is an average 2% increase in price.
Most popular time to fly with an average 32% 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.

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 $443 for a round-trip ticket.

  • 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 $868 and an overall rating of 7.2, American Airlines is the most popular choice. Iberia is also a great choice for the route, with an average price of $828 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.
7.2
American AirlinesOverall score based on 11071 reviews
6.9Entertainment
7.5Boarding
6.5Food
7.2Comfort
8.0Crew
Airline reviews

My last flight on 25 Dec, it’s Christmas Day, everyone happy and very good mood. I really enjoy traveling with Americans Airlines from Miami to Minneapolis my home town after long flight from lhe to Doha then Miami. Thank you again to make my travels comfortable and relaxed. Best regards

10.0 ExcellentAnonymous, Dec 2025
MIA - MSP
Read more American Airlines reviews

My last flight on 25 Dec, it’s Christmas Day, everyone happy and very good mood. I really enjoy traveling with Americans Airlines from Miami to Minneapolis my home town after long flight from lhe to Doha then Miami. Thank you again to make my travels comfortable and relaxed. Best regards

The boarding process needs to be fixed. The zone don't work, especially when there is hardly anyone in zones 3, 4,and 5, leaving the majority of the passengers backed up in the aisle, especially because passengers seated near the front are blocking passengers who are seated in the rear of the plane. It would also help if the size of carry on bags was more strictly enforced.

I requested a low sodium meal. Reason being, I take medicine for high blood pressure and I wear compression socks on long flights to help with leg swelling. Having less sodium in meals really helps me feel better on long flights. I received my initial low sodium meal after takeoff. Just before landing, the crew came through with the meal cart and offered me what was being served. I said no thank you and then noticed my low sodium meal in the meal cart, with my name and seat assignment on it. I motioned to the crew member, but he grabbed the meal cart and proceeded to move to the rear of the aircraft. He didn’t see me or other passengers who had attempted to get this attention. He was more concerned about completing meal service since we were due to land in under 45 minutes. I pressed the call light five times from my seat to receive help, but no crew member responded to me. So, I didn’t receive a second meal, one that I requested (the low sodium option). This led me to have a migraine from only eating one meal on an 11-hour flight. This is why I’m not a fan of flying US-based airlines overseas. The crew members continue to show the absolute worst customer service experience. I would not recommend flying American for overseas flights.

WiFi didn’t work the entire flight. Very disappointing. Minimal food and options - sadly the state of current affairs. All other aspects of the flight were fine.

Great flight - friendly and attentive team! Seats in coach were comfy, but a little cramped - but that is the case with all airlines ;)

The boarding by groups is pointless. The first two groups worked fine, but almost Noone boarded in goups three thru five leaving the vast majority boarding when group six was called. It defeated the purpose of spreading out the crowd.

I don’t know who decides what food to serve on these flights but I would be so embarrassed if I served this to anyone and call it food…

For whatever reason, the flight was not catered -we were told it would be a 45 minute delay waiting for catering - so no food. There were opened candy and peanuts in the seatback pocket. Flight landed early in DFW but due to the assigned gate not being available, we sat on the ground for 30 minutes waiting for the gate to open - making the flight actually arrive at the gate late.

Not great. Booked Extra seats and got nothing extra at all. It’s basically a big budget airline.

The pilot greased the landing and the crew was fantastic.

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 went smoothly, and we even arrived 40min earlier than scheduled, on an Orland-Madrid route.

It was budget airline Veuling, even though we booked Iberia.

The staff was very nice and helpful. Some of the best crew I have met.

Bad experience. The seat room are very tight. The food is not good and the breakfast has no hot drink.

Suddenly, I don't find my flight back on the app Help Ticket 0757345716866 Hoeflich Flight back Sunday ib5333 Ib2629 Ib4268

Great : The crew was awesome ♥️ To improve : - The rice in the "Rice with chicken" was rather s kind of rice pudding, not good at all - No power outlet to charge your phone. 😒

The food on the flight was of marginal quality. Small bits of chicken, instant mashed potatoes and some carrots. The rolls were very dry, nearly inedible. The seats were quite small and didn’t allow for any shifting of position during the flight. There was limited leg room.0

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

Information on your arrival and departure airports