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San Sebastian

$319+ 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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — EAS
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$431
(Kiwi.com)

One-way from

$319
(Kiwi.com)

Popular in

February

Cheapest in

May

Average price

$891
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. 17% potential increase in price ($207 potential increase over avg. RT price).
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Cheapest flight prices on average. 9% potential price decrease ($85 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 3, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2211:00 pmBOS - EAS
2 stops39h 00mMultiple Airlines
Tue 10/71:30 pmEAS - BOS
1 stop13h 45mMultiple Airlines
Deal found 7/3$425
This Iberia deal was found by Cheapflights users on 7/3. 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.
Sun 9/214:30 pmBOS - EAS
1 stop10h 10mIberia
Tue 10/71:30 pmEAS - BOS
1 stop13h 45mIberia
Deal found 7/3$445
This American Airlines deal was found by Cheapflights users on 7/1. 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.
Wed 9/179:38 amBOS - EAS
2 stops17h 02mAmerican Airlines
Thu 10/91:40 pmEAS - BOS
2 stops14h 39mAmerican Airlines
Deal found 7/1$621

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 July 3, 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

Mon 9/22

11:00 pm-8:00 pm

2 stops39h 00m

San Sebastián

Tue 10/7

1:30 pm-9:15 pm

1 stop13h 45m

$425

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sun 9/21

4:30 pm-8:40 am

1 stop10h 10m

San Sebastián

Tue 10/7

1:30 pm-9:15 pm

1 stop13h 45m

$445

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Wed 9/17

9:38 am-8:40 am

2 stops17h 02m

San Sebastián

Thu 10/9

1:40 pm-10:19 pm

2 stops14h 39m

$621

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sun 8/17

8:50 pm-10:55 am

3 stops32h 05m

$319

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Thu 10/2

4:30 pm-8:40 am

1 stop10h 10m

$460

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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 July 3, 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

Crew

8.0

Food

6.5

Entertainment

6.9

Comfort

7.2

Boarding

7.5

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Leonardo,May 2025

JFK - BGI

Good airline and so far i give them 8 out of 10.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Crew

8.0

Food

6.5

Entertainment

6.9

Comfort

7.2

Boarding

7.5

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Leonardo,May 2025

JFK - BGI

Good airline and so far i give them 8 out of 10.
Iberia
7.0
Good
2,819 reviews
American Airlines
7.2
Good
10,000 reviews

Crew

8.0

Food

6.5

Entertainment

6.9

Comfort

7.2

Boarding

7.5

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Leonardo,May 2025

JFK - BGI

Good airline and so far i give them 8 out of 10.

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.

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

    Currently priced at $473, Iberia will fly you from Boston to San Sebastian and back. In addition to Iberia, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on American Airlines for as low as $621. Iberia is priced at 50% 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$612Average$864FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$613Average$864FlexibilityNo cancel feeOn-time71%

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