BOS - EAS

$316 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 $[0,preposition:'from ']$[0,article:'from ']$[0,place:'from'] $[1,preposition:'to ']$[1,article:'to ']$[1,place:'to'] departing on 4/15. 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 $[0,preposition:'from ']$[0,article:'from ']$[0,place:'from'] $[1,preposition:'to ']$[1,article:'to ']$[1,place:'to'], 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 $[0,preposition:'from ']$[0,article:'from ']$[0,place:'from'] $[1,preposition:'to ']$[1,article:'to ']$[1,place:'to'], as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$472
Typical prices: $671-$859
Iberia
Sun 4/19Tue 4/28
BOS - EAS • 1 stop
Cheapest one-way
$364
Iberia
Wed 4/15
BOS - EAS • 2 stops
Top airlines
Iberia
Cheapest • from $472 (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 • 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 $[0, preposition:'from ']$[0, article:'from ']$[0, place:'from ']$[1, preposition:'to ']$[1, article:'to ']$[1, place:'to'] (BOS-EAS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights $[0,preposition:'from ']$[0,article:'from ']$[0,place:'from'] $[1, preposition:'to ']$[1,article:'to ']$[1, place:'to'] 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 $[0,preposition:'from ']$[0,article:'from ']$[0,place:'from'] $[1,preposition:'to '] $[1,article:'to ']$[1,place:'to']

Sun, Apr 19 - Tue, Apr 28
Iberia Logo
9:20 pm - 8:40 am
BOS
-
EAS
29h 20m
1 stop
Iberia Logo
9:30 pm - 7:50 pm
EAS
-
BOS
28h 20m
1 stop
$472Iberia
Wed, Apr 8 - Sun, Apr 12
Multiple Airlines Logo
11:34 am - 8:40 am
BOS
-
EAS
15h 06m
2 stops
Multiple Airlines Logo
9:30 pm - 4:10 pm
EAS
-
BOS
24h 40m
1 stop
$517Multiple Airlines
Wed, Apr 8 - Sun, Apr 12
Iberia Logo
9:20 pm - 8:40 am
BOS
-
EAS
29h 20m
1 stop
Iberia Logo
9:30 pm - 4:10 pm
EAS
-
BOS
24h 40m
1 stop
$522Iberia
Sun, Apr 19 - Tue, Apr 28
American Airlines Logo
3:17 pm - 1:00 pm
BOS
-
EAS
15h 43m
2 stops
American Airlines Logo
1:40 pm - 11:52 pm
EAS
-
BOS
16h 12m
2 stops
$526American Airlines
Thu, May 7 - Tue, May 12
Iberia Logo
5:40 pm - 1:00 pm
BOS
-
EAS
13h 20m
1 stop
Iberia Logo
9:30 pm - 7:50 pm
EAS
-
BOS
28h 20m
1 stop
$538Iberia
Tue, Aug 4 - Tue, Aug 11
Iberia Logo
9:20 pm - 8:50 pm
BOS
-
EAS
17h 30m
1 stop
Iberia Logo
9:20 am - 9:15 pm
EAS
-
BOS
17h 55m
2 stops
$565Iberia
Tue, Aug 4 - Tue, Aug 11
Iberia Logo
11:00 pm - 8:50 pm
BOS
-
EAS
15h 50m
2 stops
Iberia Logo
9:20 am - 9:15 pm
EAS
-
BOS
17h 55m
2 stops
$580Iberia
Thu, May 7 - Tue, May 12
Iberia Logo
5:40 pm - 1:00 pm
BOS
-
EAS
13h 20m
1 stop
Iberia Logo
9:20 am - 9:05 pm
EAS
-
BOS
17h 45m
2 stops
$615Iberia
Wed, Jul 15 - Wed, Jul 22
Iberia Logo
9:20 pm - 1:00 pm
BOS
-
EAS
9h 40m
1 stop
Iberia Logo
9:20 am - 4:10 pm
EAS
-
BOS
12h 50m
1 stop
$652Iberia
Wed, Jul 15 - Wed, Jul 22
American Airlines Logo
11:20 am - 8:40 am
BOS
-
EAS
15h 20m
2 stops
American Airlines Logo
9:20 am - 4:10 pm
EAS
-
BOS
12h 50m
1 stop
$658American Airlines
Booking Insights

KAYAK's insights & trends for $[0,place:'default'] $[1,preposition:'to ']$[1,article:'to ']$[1,place:'to'] flights

Get data-powered insights and trends into flights $[0,preposition:'from ']$[0,article:'from ']$[0,place:'from'] $[1,preposition:'to ']$[1,article:'to ']$[1,place:'to'] 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$364
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly and prices are also 13% lower on average.
Flight from Boston to San Sebastian

When to book flights $[0, preposition:'from ']$[0, article:'from ']$[0, place:'from ']$[1, preposition:'to ']$[1, article:'to ']$[1, place:'to']

Are your dates flexible? Find out the best times to travel $[0,preposition:'from ']$[0,article:'from ']$[0,place:'from'] $[1,preposition:'to ']$[1,article:'to ']$[1,place:'to'] 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 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 $364 for a one-way ticket and $472 for a round-trip.

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

    Yes

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

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

  • Which airline alliances offer flights from to San Sebastian?

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

  • Which is the best airline for flights $[0, preposition:'from ']$[0, article:'from ']$[0, place:'from'] $[1, preposition:'to ']$[1, article:'to ']$[1, place:'to'], American Airlines or Iberia?

    The two airlines most popular with KAYAK users for flights $[0, preposition:'from ']$[0, article:'from ']$[0, place:'from'] $[1, preposition:'to ']$[1, article:'to ']$[1, place:'to'] are American Airlines and Iberia. With an average price for the route of $864 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 $780 and an overall rating of 7.0.

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Sebastian from 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 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 with another airline. Booking your flights between 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 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 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 $[0, preposition:'from ']$[0, article:'from ']$[0, place:'from ']$[1, preposition:'to ']$[1, article:'to ']$[1, place:'to']

 
See real verified KAYAK customer reviews for airlines flying $[0,preposition:'from ']$[0,article:'from ']$[0,place:'from'] $[1,preposition:'to ']$[1,article:'to ']$[1,place:'to']. 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 $[0,preposition:'from ']$[0,article:'from ']$[0,place:'from'] $[1,preposition:'to ']$[1,article:'to ']$[1,place:'to']? 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 11248 reviews
6.9Entertainment
7.2Comfort
8.0Crew
7.5Boarding
6.4Food
Airline reviews

the plane was so hot!! the air-conditioning was barely blowing. The flight was delayed, and we had to sit on the hot plane before take off for an extended amount of time, waiting on international passengers. Would not have been so bad if it was not so hot. They said it would get better after take off, but it did not.

4.0 OkaySuzanne, Feb 2026
DFW - BOI
Read more American Airlines reviews

the plane was so hot!! the air-conditioning was barely blowing. The flight was delayed, and we had to sit on the hot plane before take off for an extended amount of time, waiting on international passengers. Would not have been so bad if it was not so hot. They said it would get better after take off, but it did not.

They are always late and seats was also not having working charger

We flew in first class. The crew did not offer drinks before the flight took off, but they treated us well during the flight. The food was excellent. There was actually too much food served, but it was nice to have all the options.

did not have enough meal for first class passengers so offer us snack

Arrived 40 min early which was great - sat in runway for 35 min so no gain. Then waited for luggage 45 min. They need to staff accordingly knowing its one of the busiest week in Phx

Broke my luggage and I can't get a resolution yet.

My flight got rerouted due to crew rest. I was sent to Dallas customer service was not very polite. Was given a $40 room voucher for Motel 6 and $12 to eat with. It delayed me by a day. Where if I would have just stuck with my original flight Arizona was delayed to Cleveland and I could have made it home. They put me on a 9:00 flight out of Dallas to Cleveland without my knowledge or consent. When originally I was told it would be 8:45 a.m. on February 1st. I told them I could not take the 9:00 flight because I did not have anybody to pick me up from the airport at that time. I'm extremely disappointed in how I was treated. And I will not fly American Airlines again.

I am very appreciative of the help provided to me by Dennis and Whitney. I had lost my phone at EWR airport and they were very kind in assisting me. This included advice on how to file a report and also helping me connect with family. The pilot was also great about keeping passengers updated on the flight progress with regular communications over the system.

Awful. Original flight was delayed 5 hours. Had to to take a connecting flight instead of direct. Had a 4 hour layover. I missed all of my morning meetings getting in 5 hours later than I was supposed to and had to change to take a later flight the next day to get them back in which cia time another $150.

Old equipment, needs upgrade and seat comfort. Internet didn't work 75% or the time.

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 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.

Everything you need to know for your flight $[0, preposition:'from ']$[0, article:'from ']$[0, place:'from'] $[1, preposition:'to ']$[1,article:'to ']$[1, place:'to']

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