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$446+ Cheap flights from Massachusetts 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
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Massachusetts to San Sebastian

Cheapest flights from Massachusetts to San Sebastian
Explore the most affordable flight options available from Massachusetts to San Sebastian. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Iberia deal was found by Cheapflights users on 12/16. 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.
Thu 12/259:20 pmBOS - EAS
1 stop17h 30mIberia
Thu 1/19:20 amEAS - BOS
1 stop11h 55mIberia
Deal found 12/16$1,810
This American Airlines deal was found by Cheapflights users on 12/16. 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.
Thu 12/257:57 amBOS - EAS
2 stops18h 43mAmerican Airlines
Thu 1/19:20 amEAS - BOS
2 stops18h 38mAmerican Airlines
Deal found 12/16$1,813
This Ovago deal was found by Cheapflights users on 12/17. 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 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 1/19:20 amEAS - BOS
2 stops16h 25mMultiple Airlines
Deal found 12/17$2,238

Find flight deals from Massachusetts to San Sebastian

Keep the following information in mind while searching for Massachusetts to San Sebastian flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$446
(Iberia)

Popular in

December

Cheapest in

November

Average price

$1,211
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.
Search Deals
From Massachusetts to San Sebastián
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($45 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Massachusetts 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 December 18, 2025.
Use the filters below to find and compare flights from Massachusetts to San Sebastian that are best for you.

Fly from

Massachusetts

Fly to

San Sebastian

Route

Depart

Return

Price

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sun 1/11

9:20 pm-8:50 pm

1 stop17h 30m

San Sebastián

Tue 1/27

2:05 pm-8:55 pm

1 stop12h 50m

$446

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sun 1/11

11:14 am-8:40 am

2 stops15h 26m

San Sebastián

Tue 1/27

9:20 am-3:15 pm

1 stop11h 55m

$449

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Mon 2/2

4:45 pm-8:40 am

1 stop9h 55m

San Sebastián

Mon 2/9

9:30 pm-3:15 pm

1 stop23h 45m

$459

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Fri 1/30

9:20 pm-8:50 pm

1 stop17h 30m

San Sebastián

Fri 2/6

1:40 pm-7:50 pm

1 stop12h 10m

$498

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Fri 1/30

9:20 pm-8:50 pm

1 stop17h 30m

San Sebastián

Fri 2/6

1:40 pm-10:56 pm

2 stops15h 16m

$508

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Thu 4/23

5:40 pm-1:00 pm

1 stop13h 20m

San Sebastián

Fri 5/1

9:30 pm-4:10 pm

1 stop24h 40m

$629

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Thu 4/23

9:38 am-8:40 am

2 stops17h 02m

San Sebastián

Fri 5/1

11:45 am-11:26 pm

2 stops17h 41m

$724

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Wed 1/28

4:45 pm-8:40 am

1 stop9h 55m

San Sebastián

Sun 2/1

9:20 am-7:50 pm

1 stop16h 30m

$726

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Best time to book a flight from Massachusetts to San Sebastian

Have a flexible travel schedule? Discover the best time to fly to San Sebastian from Massachusetts 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 Massachusetts to San Sebastian

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

Currently, October is the cheapest month in which you can book a flight from Massachusetts to San Sebastian (average of $361). Flying from Massachusetts to San Sebastian in July is currently the most expensive (average of $578). 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.

Related info for your journey

Find useful and relevant information for your journey from Massachusetts 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 airport do you fly into for flights to San Sebastian from Massachusetts?

    If you book a flight to San Sebastian from Massachusetts, you will be flying to San Sebastián, which is the city’s only airport. San Sebastián (EAS) is located 9.7 mi from the center of San Sebastian.

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

    There are many flights that can get you from Massachusetts to San Sebastian in 9h 55m. Fly via Iberia or American Airlines to get the fastest option. Airlines will cover a distance of 3398 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Massachusetts 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 Massachusetts to San Sebastian?

    Currently, October is the cheapest month in which you can book a flight from Massachusetts to San Sebastian (average of $361). Flying from Massachusetts to San Sebastian in July is currently the most expensive (average of $578). 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 Massachusetts to San Sebastian

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Top 2 airlines flying from Massachusetts to San Sebastian

Discover the top 2 airlines that operate flights from Massachusetts 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$450Average$868FlexibilityNo cancel feeOn-time71%
IberiaCheapest$522Average$828FlexibilityNo cancel feeOn-time77%

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