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San Sebastian

$297+ Cheap flights from Boston (BOS) to San Sebastian (EAS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/23. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — EAS
Mar 14 — Mar 211
Sat 3/14
Sat 3/21
1 adult, Economy
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Cheap flight deals from Boston to San Sebastian

Cheapest flights from Boston to San Sebastian
Explore the most affordable flight options available from Boston to San Sebastian. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 12, 2026.

This Iberia deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/275:40 pm
BOS
-
EAS
1 stop13h 20m
Iberia
Tue 5/51:40 pm
EAS
-
BOS
2 stops16h 12m
Iberia
Deal found 2/9$487
This American Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2711:34 am
BOS
-
EAS
2 stops15h 06m
American Airlines
Tue 5/51:40 pm
EAS
-
BOS
2 stops16h 12m
American Airlines
Deal found 2/9$491
This Iberia deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/279:20 pm
BOS
-
EAS
1 stop9h 40m
Iberia
Mon 5/41:40 pm
EAS
-
BOS
1 stop12h 10m
Iberia
Deal found 2/9$501
This American Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2711:34 am
BOS
-
EAS
2 stops15h 06m
American Airlines
Mon 5/49:20 am
EAS
-
BOS
1 stop16h 30m
American Airlines
Deal found 2/9$506
This Iberia deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:40 pm
BOS
-
EAS
1 stop21h 10m
Iberia
Sun 9/209:30 pm
EAS
-
BOS
1 stop24h 40m
Iberia
Deal found 2/9$547
This Orbitz deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/109:20 pm
BOS
-
EAS
1 stop29h 20m
Iberia
Sun 5/319:30 pm
EAS
-
BOS
1 stop28h 20m
Iberia
Deal found 2/10$557
This American Airlines deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:40 pm
BOS
-
EAS
1 stop13h 20m
American Airlines
Sat 10/319:20 am
EAS
-
BOS
2 stops17h 45m
American Airlines
Deal found 2/11$571
This American Airlines deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1011:34 am
BOS
-
EAS
2 stops15h 06m
Multiple Airlines
Sun 5/319:30 pm
EAS
-
BOS
1 stop24h 40m
Multiple Airlines
Deal found 2/10$587

Find flight deals from Boston to San Sebastian

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to San Sebastian (EAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$451
(Orbitz)

One-way from

$297
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$697
Provider with most accurate pricing for Boston Logan Intl-San Sebastián flight deals.
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Provider most trusted by Cheapflights users for Boston Logan Intl-San Sebastián flights.
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From Boston Logan Intl to San Sebastián
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One-way flight from Boston Logan Intl to San Sebastián
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($50 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in February 2026
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to San Sebastian that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 12, 2026.
Use the filters below to find and compare flights from Boston to San Sebastian that are best for you.

Fly from

Boston

Fly to

San Sebastian

Route

Depart

Return

Price

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Mon 4/27

5:40 pm-1:00 pm

1 stop13h 20m

San Sebastián

Tue 5/5

1:40 pm-11:52 pm

2 stops16h 12m

$487

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Mon 4/27

9:20 pm-1:00 pm

1 stop9h 40m

San Sebastián

Mon 5/4

1:40 pm-7:50 pm

1 stop12h 10m

$501

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Mon 4/27

11:34 am-8:40 am

2 stops15h 06m

San Sebastián

Mon 5/4

1:40 pm-11:52 pm

2 stops16h 12m

$516

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Wed 7/15

9:20 pm-1:00 pm

1 stop9h 40m

San Sebastián

Thu 7/23

9:20 am-9:15 pm

2 stops17h 55m

$665

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sat 5/9

10:50 pm-8:20 am

1 stop27h 30m

San Sebastián

Mon 6/1

8:55 am-9:05 pm

1 stop18h 10m

$693

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Mon 5/4

8:50 pm-8:20 am

3 stops29h 30m

San Sebastián

Sat 5/9

5:55 pm-9:45 pm

3 stops33h 50m

$699

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Mon 5/4

11:34 am-8:40 am

2 stops15h 06m

San Sebastián

Sat 5/9

1:40 pm-7:50 pm

1 stop12h 10m

$730

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sat 5/9

3:17 pm-8:40 am

2 stops35h 23m

San Sebastián

Fri 5/29

9:20 am-6:48 pm

2 stops15h 28m

$732

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sun 5/10

11:34 am-8:40 am

2 stops15h 06m

San Sebastián

Mon 6/1

1:40 pm-7:50 pm

1 stop12h 10m

$740

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Thu 6/25

5:40 pm-8:50 pm

1 stop21h 10m

San Sebastián

Thu 7/2

9:20 am-9:15 pm

2 stops17h 55m

$744

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/12

Showing 1-10 of 16 results
1
2

Compare providers for flights from Boston to San Sebastian

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to San Sebastian in February.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boston-San Sebastian flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-San Sebastian flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-San Sebastian flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-San Sebastian flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-San Sebastian flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Boston to San Sebastian

Have a flexible travel schedule? Discover the best time to fly to San Sebastian from Boston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Boston to San Sebastian?

Currently, March is the cheapest month in which you can book a flight from Boston to San Sebastian (average of $345). Flying from Boston to San Sebastian in July is currently the most expensive (average of $580). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing San Sebastian

Get insights into the airlines that provide service to San Sebastian. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Sebastian. Reviews last updated February 12, 2026.
Peruse reviews from past customers who have flown with American Airlines and Iberia from Boston to San Sebastian to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
11,271 reviews

Entertainment

6.9

Comfort

7.2

Crew

8.0

Boarding

7.5

Food

6.4

Overall

7.2

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
American Airlines
7.2
Good
11,271 reviews
American Airlines
7.2
Good
11,271 reviews

Entertainment

6.9

Comfort

7.2

Crew

8.0

Boarding

7.5

Food

6.4

Overall

7.2

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
Iberia
7.0
Good
3,113 reviews
American Airlines
7.2
Good
11,271 reviews

Entertainment

6.9

Comfort

7.2

Crew

8.0

Boarding

7.5

Food

6.4

Overall

7.2

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.

Related info for your journey

Find useful and relevant information for your journey from Boston to San Sebastian. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Boston to San Sebastian?

    Airlines like Iberia and American Airlines fly from Boston to San Sebastian in about 13h 20m. The time it takes to get you to your destination can typically vary by up to 1h 46m. The distance from Boston to San Sebastian is about 3398 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Boston to San Sebastian round-trip?

    Currently priced at $450, American Airlines will fly you from Boston to San Sebastian and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Iberia for as low as $487. American Airlines is priced at 42% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Boston to San Sebastian that include hotel bookings?

    Yes. In addition to deals on Boston to San Sebastian flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to San Sebastian?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to San Sebastian.

  • Can I find deals for business class flights from Boston to San Sebastian?

    Yes. Cheapflights offers flight deals from Boston to San Sebastian by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boston to San Sebastian?

    Currently, March is the cheapest month in which you can book a flight from Boston to San Sebastian (average of $345). Flying from Boston to San Sebastian in July is currently the most expensive (average of $580). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Boston to San Sebastian

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Boston to San Sebastian

Discover the top 2 airlines that operate flights from Boston to San Sebastian. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$450Average$864FlexibilityNo cancel feeOn-time71%
IberiaCheapest$487Average$770FlexibilityNo cancel feeOn-time77%

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