BOS - EAS

$492 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 12/2. 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
$492
Overall average: $1,211
Iberia
Tue 12/2Sun 12/7
BOS - EAS • 1 stop
Cheapest one-way
$509
American Airlines
Wed 12/10
BOS - EAS • 1 stop
Top airlines
Iberia
Cheapest • from $492 (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 • 41% 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

Tue, Dec 2 - Sun, Dec 7
Iberia Logo
4:45 pm - 1:00 pmBOS-EAS
14h 15m1 stop
Iberia Logo
1:40 pm - 7:50 pmEAS-BOS
12h 10m1 stop
$492Iberia
Find Deal
Tue, Dec 2 - Sun, Dec 7
Iberia Logo
4:45 pm - 1:00 pmBOS-EAS
14h 15m1 stop
Iberia Logo
9:30 pm - 4:00 pmEAS-BOS
48h 30m2 stops
$494Iberia
Find Deal
Tue, Dec 2 - Sun, Dec 7
Iberia Logo
4:45 pm - 8:40 amBOS-EAS
9h 55m1 stop
Iberia Logo
9:20 am - 7:50 pmEAS-BOS
16h 30m1 stop
$497Iberia
Find Deal
Sun, Feb 22 - Sun, Mar 1
Iberia Logo
12:01 pm - 8:40 amBOS-EAS
14h 39m2 stops
Iberia Logo
1:40 pm - 7:50 pmEAS-BOS
12h 10m1 stop
$502Iberia
Find Deal
Tue, Dec 2 - Sun, Dec 7
American Airlines Logo
11:56 am - 1:00 pmBOS-EAS
19h 04m2 stops
American Airlines Logo
9:20 am - 6:52 pmEAS-BOS
15h 32m2 stops
$512American Airlines
Find Deal
Sun, Dec 7 - Sat, Dec 13
American Airlines Logo
12:03 pm - 8:40 amBOS-EAS
14h 37m2 stops
American Airlines Logo
9:30 pm - 7:50 pmEAS-BOS
28h 20m1 stop
$513American Airlines
Find Deal
Sun, Dec 7 - Sat, Dec 13
Iberia Logo
9:20 pm - 8:40 amBOS-EAS
29h 20m1 stop
Iberia Logo
9:30 pm - 7:50 pmEAS-BOS
28h 20m1 stop
$517Iberia
Find Deal
Sun, Dec 7 - Sat, Dec 13
American Airlines Logo
12:03 pm - 8:40 amBOS-EAS
14h 37m2 stops
American Airlines Logo
9:30 pm - 6:33 pmEAS-BOS
27h 03m2 stops
$523American Airlines
Find Deal
Sun, Feb 22 - Sun, Mar 1
Iberia Logo
12:01 pm - 8:40 amBOS-EAS
14h 39m2 stops
Iberia Logo
9:20 am - 10:52 pmEAS-BOS
19h 32m2 stops
$536Iberia
Find Deal
Mon, Dec 8 - Sun, Dec 14
Multiple Airlines Logo
4:45 pm - 8:40 amBOS-EAS
9h 55m1 stop
Multiple Airlines Logo
9:30 pm - 3:15 pmEAS-BOS
23h 45m1 stop
$538Multiple Airlines
Find Deal
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 February and December, where the average cost of round-trip tickets is $1,808 and $1,211 respectively.

Good to know

Low seasonJanuary
Cheapest flight$492
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly with an average 26% 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 $509 for a one-way ticket and $492 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 $882 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 $836 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 11032 reviews
6.4Food
7.5Boarding
7.2Comfort
6.9Entertainment
8.0Crew
Airline reviews

The flight attendant, a black woman with curly hair who sat near Row 21, was wonderful and kind.

10.0 ExcellentMax, Oct 2025DCA - SAV
Read more American Airlines reviews

The flight attendant, a black woman with curly hair who sat near Row 21, was wonderful and kind.

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

Flight was delayed leaving Dallas. Arrived about 2 hours later than scheduled.

Flight delayed and missed connection. Rescheduled flight cancelled after 6 hrs wait. Rerouted thru ORD, flight cancelled, overnight stay in ORD. Still in the air on new flight!

We are too tired and frustrated to comment politely at this point

Terrible. Our luggage was delayed and couldn’t be delivered for several days. We got bad information from the airline agents at baggage claim. We had to pick up our car so we wouldn’t be charged for an extra day. We got lost in the maze of airport parking. The baggage claim agents didn’t offer us any compensation for our extra time and expense. We are tired, hungry and very frustrated.

The flight was flawless and we even arrived between 20 and 25 minutes early!

The only thing to like was that we eventually got to our destination

Delayed delayed delayed and no offer for food or vouchers

Disliked having to wait a little longer to disembark from the plan when we landed in London

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

It was a good flight overall. Nothing to add. Keep it up!

Excellent. Thanks to United Star Alliance, since economy was overbooked, I’m grateful to have been upgraded to Business Class.

Good plane, excellent food, crew and entertainment. Seats in business could use an upgrade

Delayed. Mismanagement of gate lines. Passengers arguing with eachother as a result of lack of organization by airline. Avoid this airline.

Disaster. Downgraded. Zero apology. No effort or coordination between gate and crew. Awful seat blocked by door emergency slide box. Iberia is a mess. App never works. Avoid this airline.

We departed late but made up most of the time in flight. Our ticket was pure economy, so it wasn’t anything fancy; however, I heard that we arrived in Madrid at the exact same time that First Class passengers arrived! Overall, our experience was similar to what we had on other American Airlines transatlantic flights - good value at a reasonable price. We were even able to get our carry-on baggage onto the plane without needing to gate check it.

Flight was OK. Waiting for luggage in Madrid for 55 minutes, unacceptable

Transportation from gate to airplane was poor we stayed in hot bus for 20 minute no vantilation

Because the plane was delayed from Madrid to LAX, we missed our connecting flight to Malaga. Iberia offered to book us a hotel room but I needed to be in Malaga that evening. I ended up buying train tickets to Malaga from Madrid. I also feel Iberia should compensate me for the cost of the train tickets because they didn't meet their travel obligation.

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

Information on your arrival and departure airports

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