$380 Cheap Flights from Boston (BOS) to San Sebastian (EAS)

View $380 flight on Wed, Oct 15, 2025Opens in a new window

Popular airlines from Logan International Airport (BOS) to San Sebastian (EAS)

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Cheap Flights from Boston to San Sebastian (BOS-EAS)

Prices were available within the past 7 days and start at $380 for one-way flights and $415 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Iberia
Tue, Jan 20 - Tue, Jan 27
BOS
Boston
EAS
San Sebastián
$415 Roundtrip, found 2 days ago
$415
Roundtrip
found 2 days ago
Select Iberia flight, departing Tue, Jan 20 from Boston to San Sebastián, returning Tue, Jan 27, priced at $415 found 2 days ago
American Airlines
Tue, Jan 13 - Tue, Jan 20
BOS
Boston
EAS
San Sebastián
$417 Roundtrip, found 1 day ago
$417
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Jan 13 from Boston to San Sebastián, returning Tue, Jan 20, priced at $417 found 1 day ago
Iberia
Tue, Jan 13 - Tue, Jan 20
BOS
Boston
EAS
San Sebastián
$422 Roundtrip, found 1 day ago
$422
Roundtrip
found 1 day ago
Select Iberia flight, departing Tue, Jan 13 from Boston to San Sebastián, returning Tue, Jan 20, priced at $422 found 1 day ago
American Airlines
Tue, Nov 4 - Tue, Nov 11
BOS
Boston
EAS
San Sebastián
$428 Roundtrip, found 5 days ago
$428
Roundtrip
found 5 days ago
Select American Airlines flight, departing Tue, Nov 4 from Boston to San Sebastián, returning Tue, Nov 11, priced at $428 found 5 days ago
Iberia
Tue, Jan 20 - Tue, Jan 27
BOS
Boston
EAS
San Sebastián
$428 Roundtrip, found 2 days ago
$428
Roundtrip
found 2 days ago
Select Iberia flight, departing Tue, Jan 20 from Boston to San Sebastián, returning Tue, Jan 27, priced at $428 found 2 days ago
Iberia
Tue, Jan 13 - Tue, Jan 20
BOS
Boston
EAS
San Sebastián
$432 Roundtrip, found 1 day ago
$432
Roundtrip
found 1 day ago
Select Iberia flight, departing Tue, Jan 13 from Boston to San Sebastián, returning Tue, Jan 20, priced at $432 found 1 day ago
American Airlines
Tue, Jan 20 - Tue, Jan 27
BOS
Boston
EAS
San Sebastián
$432 Roundtrip, found 2 days ago
$432
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Jan 20 from Boston to San Sebastián, returning Tue, Jan 27, priced at $432 found 2 days ago
American Airlines
Tue, Jan 20 - Tue, Jan 27
BOS
Boston
EAS
San Sebastián
$436 Roundtrip, found 2 days ago
$436
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Jan 20 from Boston to San Sebastián, returning Tue, Jan 27, priced at $436 found 2 days ago
American Airlines
Tue, Jan 20 - Tue, Jan 27
BOS
Boston
EAS
San Sebastián
$437 Roundtrip, found 2 days ago
$437
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Jan 20 from Boston to San Sebastián, returning Tue, Jan 27, priced at $437 found 2 days ago
British Airways
Wed, Oct 29 - Wed, Nov 5
BOS
Boston
EAS
San Sebastián
$454 Roundtrip, found 12 hours ago
$454
Roundtrip
found 12 hours ago
Select British Airways flight, departing Wed, Oct 29 from Boston to San Sebastián, returning Wed, Nov 5, priced at $454 found 12 hours ago

Frequently asked questions

How much does a flight from Logan Intl. Airport (BOS) to San Sebastian Airport (EAS) cost?
Get a cheap one-way flight from $380 or cheap return flight from $415 from Logan Intl. Airport (BOS) to San Sebastian Airport (EAS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Logan Intl. Airport (BOS) to San Sebastian Airport (EAS)?
Planning your trip for January can help you save, as it's the cheapest month for flights between BOS and EAS. You'll usually find the lowest prices during off-peak months.
What is the cheapest airline that flies from Logan Intl. Airport (BOS) to San Sebastian Airport (EAS)?
To find the cheapest airline that'll fly you from BOS to EAS, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Logan Intl. Airport (BOS) to San Sebastian Airport (EAS)?
There are no daily direct flights from Logan Intl. Airport (BOS) to San Sebastian Airport (EAS). But you can opt for flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from BOS to EAS?
Typically you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can change depending on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Logan Intl. Airport (BOS) to San Sebastian Airport (EAS)?
To avoid potential delays on the Logan Intl. Airport (BOS) to San Sebastian Airport (EAS) route, aim to travel before 3 PM. Flights after this time are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Logan Intl. Airport (BOS) to San Sebastian Airport (EAS) last-minute?
Last-minute fares from BOS to EAS are generally more expensive. For the lowest prices, start searching for flights early. That said, if you're flexible with your travel dates, it's possible to land a cheap ticket right before you leave.
Is it cheaper to book a BOS to EAS flight and hotel package?
Booking a BOS to EAS flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Choose from our impressive range of stays and then add activities, flights and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Logan Intl. Airport (BOS) to San Sebastian Airport (EAS)?
You can usually reschedule or cancel your BOS to EAS flight. However, for bookings made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Travel information

Origin airport
Logan Intl.
Destination airport
San Sebastian
Airlines serving
American Airlines, British Airways, Iberia
Roundtrip price
$414
Distance
3400 mi

Book with confidence

Book with confidence

Boston to San Sebastian Flights

The cheapest times to fly from Boston to San Sebastian

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Boston to San Sebastian are during the month of January. You can find some of the cheapest flights from Boston to San Sebastian with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Boston to San Sebastian

Sunday is one of the best days to book for cheap flights from Boston to San Sebastian: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Boston to San Sebastian

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Boston to San Sebastian in 2025. You can also book with separate airlines for your outbound and return journeys, from $380 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Boston to San Sebastian flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Boston to San Sebastian airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Boston to San Sebastian Flights

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*Available to One Key members.