What airlines fly to San Sebastian?

Iberia, Lufthansa and American Airlines are the top three most popular airlines that fly to San Sebastian from Boston according to our data. Iberia is the first choice among our users, with 62% of people opting to fly with this airline when traveling to San Sebastian. Keep in mind that there are 8 different airlines that fly to San Sebastian on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Boston Logan Intl Airport to San Sebastián Airport?

Prices for flights from Boston Logan Intl Airport to San Sebastián Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Boston Logan Intl Airport to San Sebastián Airport?

As of December 2025, there are 2 operators available to choose from for flights from Boston Logan Intl Airport to San Sebastián Airport.

How old do you have to be to fly from Boston Logan Intl Airport to San Sebastián Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Boston Logan Intl Airport to San Sebastián Airport.

What documentation or ID do you need to fly to San Sebastián Airport?

The necessary travel and health documents for your San Sebastián Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$450 Cheap Flights from Boston to San Sebastian in 2025/26

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Find the cheapest flights from Boston to San Sebastian

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Cheap round-trip flights

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9:38 am - 8:40 am

BOS

EAS

17h 02m2 stops

1:40 pm - 11:26 pm

EAS

BOS

15h 46m2 stops

$623American Airlines

Wed, Apr 22 - Sun, Apr 26

9:20 pm - 8:50 pm

BOS

EAS

17h 30m1 stop

9:20 am - 7:50 pm

EAS

BOS

16h 30m1 stop

$726Iberia

Wed, Feb 4 - Sun, Feb 8

5:10 pm - 1:00 pm

BOS

EAS

13h 50m2 stops

9:20 am - 3:15 pm

EAS

BOS

11h 55m1 stop

$730Iberia

Wed, Feb 4 - Sun, Feb 8

9:20 pm - 1:00 pm

BOS

EAS

9h 40m1 stop

1:40 pm - 11:26 pm

EAS

BOS

15h 46m2 stops

$738American Airlines

Wed, Apr 22 - Sun, Apr 26

5:10 pm - 1:00 pm

BOS

EAS

13h 50m2 stops

1:40 pm - 10:56 pm

EAS

BOS

15h 16m2 stops

$740Iberia

Wed, Feb 4 - Sun, Feb 8

5:40 pm - 1:00 pm

BOS

EAS

13h 20m1 stop

9:30 pm - 5:45 pm

EAS

BOS

26h 15m2 stops

$789Iberia

Sat, May 16 - Thu, Jun 25

7:30 pm - 12:15 pm

BOS

EAS

34h 45m2 stops

9:30 pm - 6:54 pm

EAS

BOS

27h 24m2 stops

$825Multiple Airlines

Sat, May 16 - Thu, Jun 25

5:40 pm - 1:00 pm

BOS

EAS

13h 20m1 stop

9:30 pm - 5:45 pm

EAS

BOS

26h 15m2 stops

$859Iberia

Sat, May 16 - Fri, Jun 26

5:40 pm - 1:00 pm

BOS

EAS

13h 20m1 stop

9:20 am - 4:10 pm

EAS

BOS

12h 50m1 stop

$919Iberia

Sat, May 16 - Thu, Jun 25

9:20 pm - 8:40 am

BOS

EAS

29h 20m1 stop

1:40 pm - 4:10 pm

EAS

BOS

32h 30m1 stop

$985Multiple Airlines

Wed, Apr 22 - Sun, Apr 26

American Airlines flights from Boston to San Sebastian

Our best American Airlines deals on Boston to San Sebastian flight tickets

American Airlines

Apr 22

BOS9:38 amBoston Logan Intl

17h 02m

2 stops

EAS8:40 amSan Sebastián

Apr 26

EAS1:40 pmSan Sebastián

15h 46m

2 stops

BOS11:26 pmBoston Logan Intl

$623

Find similar

American Airlines

Apr 22

BOS9:20 pmBoston Logan Intl

9h 40m

1 stop

EAS1:00 pmSan Sebastián

Apr 26

EAS1:40 pmSan Sebastián

15h 46m

2 stops

BOS11:26 pmBoston Logan Intl

$738

Find similar

American Airlines

Dec 25

BOS1:48 pmBoston Logan Intl

17h 12m

2 stops

EAS1:00 pmSan Sebastián

Jan 1

EAS9:20 amSan Sebastián

16h 30m

1 stop

BOS7:50 pmBoston Logan Intl

$1,179

Find similar

Iberia flights from Boston to San Sebastian

Our best Iberia deals on Boston to San Sebastian flight tickets

Iberia

Feb 4

BOS9:20 pmBoston Logan Intl

17h 30m

1 stop

EAS8:50 pmSan Sebastián

Feb 8

EAS9:20 amSan Sebastián

16h 30m

1 stop

BOS7:50 pmBoston Logan Intl

$726

Find similar

Iberia

Feb 4

BOS5:10 pmBoston Logan Intl

13h 50m

2 stops

EAS1:00 pmSan Sebastián

Feb 8

EAS9:20 amSan Sebastián

11h 55m

1 stop

BOS3:15 pmBoston Logan Intl

$730

Find similar

Iberia

Feb 4

BOS5:10 pmBoston Logan Intl

13h 50m

2 stops

EAS1:00 pmSan Sebastián

Feb 8

EAS1:40 pmSan Sebastián

15h 16m

2 stops

BOS10:56 pmBoston Logan Intl

$740

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Wed 4/22

9:38 am-8:40 am

2 stops17h 02m

San Sebastián

Sun 4/26

1:40 pm-11:26 pm

2 stops15h 46m

$623

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Wed 2/4

9:20 pm-8:50 pm

1 stop17h 30m

San Sebastián

Sun 2/8

9:20 am-7:50 pm

1 stop16h 30m

$726

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Wed 2/4

5:10 pm-1:00 pm

2 stops13h 50m

San Sebastián

Sun 2/8

9:20 am-3:15 pm

1 stop11h 55m

$730

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Wed 4/22

9:20 pm-1:00 pm

1 stop9h 40m

San Sebastián

Sun 4/26

1:40 pm-11:26 pm

2 stops15h 46m

$738

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Wed 2/4

5:10 pm-1:00 pm

2 stops13h 50m

San Sebastián

Sun 2/8

1:40 pm-10:56 pm

2 stops15h 16m

$740

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sat 5/16

5:40 pm-1:00 pm

1 stop13h 20m

San Sebastián

Thu 6/25

9:30 pm-5:45 pm

2 stops26h 15m

$789

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sat 5/16

7:30 pm-12:15 pm

2 stops34h 45m

San Sebastián

Thu 6/25

9:30 pm-6:54 pm

2 stops27h 24m

$825

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sat 5/16

5:40 pm-1:00 pm

1 stop13h 20m

San Sebastián

Fri 6/26

9:30 pm-5:45 pm

2 stops26h 15m

$859

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sat 5/16

5:40 pm-1:00 pm

1 stop13h 20m

San Sebastián

Thu 6/25

9:20 am-4:10 pm

1 stop12h 50m

$919

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Wed 4/22

9:20 pm-8:40 am

1 stop29h 20m

San Sebastián

Sun 4/26

1:40 pm-4:10 pm

1 stop32h 30m

$985

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Boston to San Sebastian

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to San Sebastian?

The month of November is, on average, the cheapest month to fly to San Sebastian from Boston, with most prices found around $517. If you are unable to visit San Sebastian during the month of November, then departing from Boston during the month September is also very affordable. Most momondo users find prices during this month for around $547.

What is the cheapest day to depart on your flight to San Sebastian?

On average, the least expensive day to fly to San Sebastian from Boston is on a Thursday. momondo users have found tickets for Thursday departures for as low as $649. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Boston to San Sebastian for around $1,316.

What is the cheapest time of day to depart on your flight to San Sebastian?

Flying to San Sebastian from Boston in the morning is the least expensive time of day to depart. momondo users have found prices as low as $822 when looking at flights departing in the morning. Flights to San Sebastian are more costly in the evening, with an average ticket price of $986. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

When to book flights from Boston to San Sebastian

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to San Sebastian according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Boston to San Sebastian (BOS to EAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to San Sebastian

Fastest flight time	9h 40m
Direct flights	None

The fastest flight from Boston to San Sebastian takes 9h 40m

There are no direct flights from Boston to San Sebastian. There are no popular flight routes from Boston to San Sebastian.

Search flight deals

How far is Boston Logan Intl to San Sebastián by plane?
The straight-line distance from Boston Logan Intl to San Sebastián is 3393.2 mi. Flights usually cover this in 9h 40m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Boston Logan Intl Airport to San Sebastián Airport?
Prices for flights from Boston Logan Intl Airport to San Sebastián Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Boston Logan Intl Airport to San Sebastián Airport?
As of December 2025, there are 2 operators available to choose from for flights from Boston Logan Intl Airport to San Sebastián Airport.
How old do you have to be to fly from Boston Logan Intl Airport to San Sebastián Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Boston Logan Intl Airport to San Sebastián Airport.
What documentation or ID do you need to fly to San Sebastián Airport?
The necessary travel and health documents for your San Sebastián Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Boston to San Sebastian?
momondo data reveals that the most frequently booked airline on the route from Boston to San Sebastian is Iberia, representing 68% of all bookings. The subsequent popular airline is American Airlines at 32%.

Best airlines flying from Boston to San Sebastian

Compare and see reviews for airlines that fly from Boston to San Sebastian with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $450	Free Cancellation	Rating 7.2 11,048 reviews		Search American Airlines flights
Iberia	PriceFrom $522	Free Cancellation	Rating 7.0 3,045 reviews		Search Iberia flights

Irun

Hondarribia

Why use momondo?

Why should I use momondo to find a flight deal from Boston to San Sebastian?

Finding the right flight to San Sebastian from Boston is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to San Sebastian quick and easy, saving you time and money.

Can I find flights from Boston to San Sebastian with flexible booking policies on momondo?

All flight searches from Boston to San Sebastian on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Boston to San Sebastian?

Once all potential Boston to San Sebastian flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Boston to San Sebastian right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Boston to San Sebastian flights. All you need is a valid email address and we will do the rest; it is that quick and easy.