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San Sebastian

$507+ Cheap flights from Boston (BOS) to San Sebastian (EAS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — EAS
Dec 29 — Jan 51
Mon 12/29
Mon 1/5
1 adult, Economy
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Find 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 November 29, 2025.

This Orbitz deal was found by Cheapflights users on 11/27. 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.
Fri 11/2811:56 amBOS - EAS
2 stops38h 44mIberia
Fri 12/59:20 amEAS - BOS
1 stop11h 55mIberia
Deal found 11/27$583
This American Airlines deal was found by Cheapflights users on 11/27. 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.
Fri 11/284:50 pmBOS - EAS
1 stop14h 10mAmerican Airlines
Fri 12/59:20 amEAS - BOS
1 stop16h 30mAmerican Airlines
Deal found 11/27$733
This Iberia deal was found by Cheapflights users on 11/28. 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.
Thu 12/254:45 pmBOS - EAS
1 stop9h 55mIberia
Thu 1/19:20 amEAS - BOS
2 stops18h 38mIberia
Deal found 11/28$1,114
This American Airlines deal was found by Cheapflights users on 11/27. 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.
Thu 12/254:45 pmBOS - EAS
1 stop9h 55mAmerican Airlines
Thu 1/19:20 amEAS - BOS
2 stops16h 25mAmerican Airlines
Deal found 11/27$1,132
This Mytrip deal was found by Cheapflights users on 11/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2810:45 amBOS - EAS
3 stops20h 45mMultiple Airlines
Fri 12/52:05 pmEAS - BOS
2 stops30h 30mMultiple Airlines
Deal found 11/27$1,149
This Ovago deal was found by Cheapflights users on 11/28. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:45 pmBOS - EAS
1 stop9h 55mMultiple Airlines
Thu 1/19:30 pmEAS - BOS
1 stop28h 20mMultiple Airlines
Deal found 11/28$1,314

Cheap 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 November 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$507
(Iberia)

Popular in

December

Cheapest in

November

Average price

$517
Provider with most accurate pricing for Boston Logan Intl-San Sebastián flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-San Sebastián flights.
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From Boston Logan Intl to San Sebastián
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($48 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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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 November 29, 2025.
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

Sun 1/11

12:16 pm-8:40 am

2 stops14h 24m

San Sebastián

Sun 1/18

1:40 pm-10:56 pm

2 stops15h 16m

$507

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sun 1/11

10:40 pm-1:30 pm

1 stop32h 50m

San Sebastián

Sun 1/18

2:05 pm-8:55 pm

1 stop12h 50m

$510

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sun 1/11

9:20 pm-8:40 am

1 stop29h 20m

San Sebastián

Sun 1/18

9:20 am-10:56 pm

2 stops19h 36m

$540

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Fri 4/17

9:38 am-8:40 am

2 stops17h 02m

San Sebastián

Thu 4/23

1:40 pm-11:26 pm

2 stops15h 46m

$572

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Wed 2/11

4:45 pm-8:40 am

1 stop9h 55m

San Sebastián

Tue 2/17

9:30 pm-3:15 pm

1 stop23h 45m

$630

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Fri 5/22

9:20 pm-1:00 pm

1 stop9h 40m

San Sebastián

Sat 5/30

9:30 pm-4:10 pm

1 stop24h 40m

$698

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Fri 4/17

10:50 pm-5:20 pm

1 stop12h 30m

San Sebastián

Thu 4/23

9:20 am-4:10 pm

1 stop12h 50m

$801

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Fri 4/17

9:38 am-8:40 am

2 stops17h 02m

San Sebastián

Sat 4/25

1:40 pm-11:26 pm

2 stops15h 46m

$807

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sun 2/8

4:45 pm-8:40 am

1 stop9h 55m

San Sebastián

Wed 2/11

1:40 pm-7:50 pm

1 stop12h 10m

$826

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/27

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 November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Boston-San Sebastian flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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, October is the cheapest month in which you can book a flight from Boston to San Sebastian (average of $361). Flying from Boston to San Sebastian in July is currently the most expensive (average of $575). 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 November 29, 2025.
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
11,043 reviews

Food

6.4

Comfort

7.2

Boarding

7.5

Overall

7.2

Crew

8.0

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
American Airlines
7.2
Good
11,043 reviews
American Airlines
7.2
Good
11,043 reviews

Food

6.4

Comfort

7.2

Boarding

7.5

Overall

7.2

Crew

8.0

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
Iberia
7.0
Good
3,035 reviews
American Airlines
7.2
Good
11,043 reviews

Food

6.4

Comfort

7.2

Boarding

7.5

Overall

7.2

Crew

8.0

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.

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 14h 24m. The time it takes to get you to your destination can typically vary by up to 14h 56m. 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 $522. American Airlines is priced at 43% 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, October is the cheapest month in which you can book a flight from Boston to San Sebastian (average of $361). Flying from Boston to San Sebastian in July is currently the most expensive (average of $575). 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.
Boston to Bilbao flights
Hartford to Bilbao flights

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 November 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$450Average$868FlexibilityNo cancel feeOn-time71%
IberiaCheapest$522Average$828FlexibilityNo cancel feeOn-time77%

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