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San Sebastian

$289+ 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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — EAS
ago. 23 — ago. 301
sáb. 8/23
sáb. 8/30
1 adult, Economy
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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 agosto 18, 2025.

Round-trip from

$447
(Iberia)

One-way from

$289
(Kiwi.com)

Popular in

February

Cheapest in

May

Average price

$868
From Boston Logan Intl to San Sebastián
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One-way flight from Boston Logan Intl to San Sebastián
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Highest demand for flights based on searches. 19% potential increase in price ($229 potential increase over avg. RT price).
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Cheapest flight prices on average. 10% potential price decrease ($88 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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 agosto 18, 2025.

This Iberia deal was found by Cheapflights users on 8/17. 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.
mié. 10/14:30 pmBOS - EAS
1 stop10h 10mIberia
mié. 10/89:20 amEAS - BOS
1 stop16h 30mIberia
Deal found 8/17$447
This American Airlines deal was found by Cheapflights users on 8/16. 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.
dom. 9/284:30 pmBOS - EAS
1 stop10h 10mAmerican Airlines
mar. 10/149:20 amEAS - BOS
1 stop11h 40mAmerican Airlines
Deal found 8/16$449
This Iberia deal was found by Cheapflights users on 8/16. 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.
dom. 9/284:30 pmBOS - EAS
1 stop22h 20mIberia
mar. 10/141:30 pmEAS - BOS
1 stop13h 45mIberia
Deal found 8/16$455
This Finnair deal was found by Cheapflights users on 8/16. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/154:30 pmBOS - EAS
1 stop10h 10mMultiple Airlines
lun. 10/209:30 pmEAS - BOS
2 stops30h 49mMultiple Airlines
Deal found 8/16$457
This Cheapflightsfares deal was found by Cheapflights users on 8/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/164:30 pmBOS - EAS
1 stop10h 10mIberia
mar. 10/71:30 pmEAS - BOS
1 stop13h 45mIberia
Deal found 8/17$469
This Expedia deal was found by Cheapflights users on 8/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/17:40 pmBOS - EAS
2 stops31h 00mMultiple Airlines
mié. 10/89:30 pmEAS - BOS
1 stop23h 30mMultiple Airlines
Deal found 8/17$478
This Travelocity deal was found by Cheapflights users on 8/18. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/94:30 pmBOS - EAS
1 stop10h 10mIberia
lun. 9/159:30 pmEAS - BOS
2 stops27h 19mIberia
Deal found 8/18$482
This Expedia deal was found by Cheapflights users on 8/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/29:20 pmBOS - EAS
1 stop9h 40mIberia
jue. 10/99:20 amEAS - BOS
1 stop11h 40mIberia
Deal found 8/18$497

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 agosto 18, 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

mié. 10/1

4:30 pm-8:40 am

1 stop10h 10m

San Sebastián

mié. 10/8

9:20 am-7:50 pm

1 stop16h 30m

$447

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

dom. 9/28

4:30 pm-8:40 am

1 stop10h 10m

San Sebastián

mar. 10/14

9:20 am-3:00 pm

1 stop11h 40m

$449

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

dom. 9/28

4:30 pm-8:50 pm

1 stop22h 20m

San Sebastián

mar. 10/14

1:30 pm-9:15 pm

1 stop13h 45m

$455

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

mié. 10/15

4:30 pm-8:40 am

1 stop10h 10m

San Sebastián

lun. 10/20

9:30 pm-10:19 pm

2 stops30h 49m

$457

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

mar. 9/16

4:30 pm-8:40 am

1 stop10h 10m

San Sebastián

mar. 10/7

1:30 pm-9:15 pm

1 stop13h 45m

$469

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

mié. 10/1

7:40 pm-8:40 am

2 stops31h 00m

San Sebastián

mié. 10/8

9:30 pm-3:00 pm

1 stop23h 30m

$478

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

mar. 9/9

4:30 pm-8:40 am

1 stop10h 10m

San Sebastián

lun. 9/15

9:30 pm-6:49 pm

2 stops27h 19m

$482

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

mar. 9/16

6:10 pm-8:25 am

3 stops32h 15m

$289

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

lun. 9/15

9:25 pm-8:00 pm

2 stops40h 35m

$314

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

mar. 9/2

8:50 pm-8:30 am

3 stops29h 40m

$324

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

Showing 1-10 of 14 results
1
2

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.

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 agosto 18, 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
10,000 reviews

Food

6.5

Boarding

7.5

Overall

7.2

Comfort

7.2

Crew

8.0

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

MIA - DCA

Flight delayed 5 hours and was told it was due to mechanical issues. Instead of providing lodging due to missed connecting flight, American changed the cause of delay to weather, which meant they were not able required to provide a hotel. To make matters worse, one of our checked bags was lost even though its status said it was “by the plane” but no one at the service desk seemed able to locate it.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Food

6.5

Boarding

7.5

Overall

7.2

Comfort

7.2

Crew

8.0

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

MIA - DCA

Flight delayed 5 hours and was told it was due to mechanical issues. Instead of providing lodging due to missed connecting flight, American changed the cause of delay to weather, which meant they were not able required to provide a hotel. To make matters worse, one of our checked bags was lost even though its status said it was “by the plane” but no one at the service desk seemed able to locate it.
Iberia
7.0
Good
2,884 reviews
American Airlines
7.2
Good
10,000 reviews

Food

6.5

Boarding

7.5

Overall

7.2

Comfort

7.2

Crew

8.0

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

MIA - DCA

Flight delayed 5 hours and was told it was due to mechanical issues. Instead of providing lodging due to missed connecting flight, American changed the cause of delay to weather, which meant they were not able required to provide a hotel. To make matters worse, one of our checked bags was lost even though its status said it was “by the plane” but no one at the service desk seemed able to locate it.

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 10h 10m. The time it takes to get you to your destination can typically vary by up to . The distance from Boston to San Sebastian is about 3398 mi.

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

    Currently priced at $492, 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 $564. American Airlines is priced at 47% 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.

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 agosto 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$492Average$864FlexibilityNo cancel feeOn-time71%
IberiaCheapest$564Average$860FlexibilityNo cancel feeOn-time77%

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