What airlines fly to San Sebastian?

Iberia, KLM and Delta 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 36% of people opting to fly with this airline when traveling to San Sebastian. Keep in mind that there are 10 different airlines that fly to San Sebastian on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Boston Logan Intl to San Sebastián?

Iberia is the most popular carrier operating from Boston Logan Intl to San Sebastián

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 September 2026, there is 1 operator 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.

$367 Cheap Flights from Boston to San Sebastian in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Boston to San Sebastian

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:55 pm - 8:20 amBOS Boston Logan Intl-EAS San Sebastián

27h 25m1 stop Barcelona-El Prat

9:10 am - 9:05 pmEAS San Sebastián-BOS Boston Logan Intl

17h 55m1 stop Barcelona-El Prat

$677Multiple Airlines

Thu, Oct 15 - Thu, Oct 22

11:35 pm - 5:20 pmBOS Boston Logan Intl-EAS San Sebastián

11h 45m1 stop Barcelona-El Prat

8:55 am - 9:45 pmEAS San Sebastián-BOS Boston Logan Intl

18h 50m1 stop Barcelona-El Prat

$722LEVEL

Sun, Sep 27 - Sun, Oct 4

10:55 pm - 8:20 amBOS Boston Logan Intl-EAS San Sebastián

27h 25m1 stop Barcelona-El Prat

11:10 am - 9:05 pmEAS San Sebastián-BOS Boston Logan Intl

15h 55m2 stops Malaga Barcelona-El Prat

$728Multiple Airlines

Thu, Oct 15 - Thu, Oct 22

10:55 pm - 5:25 pmBOS Boston Logan Intl-EAS San Sebastián

12h 30m1 stop Barcelona-El Prat

5:55 pm - 9:05 pmEAS San Sebastián-BOS Boston Logan Intl

33h 10m1 stop Barcelona-El Prat

$790Multiple Airlines

Wed, Sep 30 - Wed, Oct 7

3:30 pm - 1:35 pmBOS Boston Logan Intl-EAS San Sebastián

16h 05m2 stops Montreal Pierre Elliott Trudeau Intl Barcelona-El Prat

6:10 pm - 2:53 pmEAS San Sebastián-BOS Boston Logan Intl

26h 43m3 stops Barcelona-El Prat Frankfurt am Main Montreal Pierre Elliott Trudeau Intl

$827Multiple Airlines

Wed, Nov 25 - Sun, Nov 29

3:30 pm - 1:35 pmBOS Boston Logan Intl-EAS San Sebastián

16h 05m2 stops Montreal Pierre Elliott Trudeau Intl Barcelona-El Prat

6:10 pm - 7:55 pmEAS San Sebastián-BOS Boston Logan Intl

31h 45m2 stops Barcelona-El Prat Lisbon Humberto Delgado

$870Multiple Airlines

Wed, Nov 25 - Sun, Nov 29

8:50 pm - 8:35 amBOS Boston Logan Intl-EAS San Sebastián

29h 45m2 stops Reykjavik Keflavik Intl Barcelona-El Prat

9:20 am - 7:00 pmEAS San Sebastián-BOS Boston Logan Intl

14h 40m1 stop Madrid Barajas

$876Multiple Airlines

Tue, Oct 13 - Tue, Oct 27

11:35 pm - 8:20 amBOS Boston Logan Intl-EAS San Sebastián

26h 45m1 stop Barcelona-El Prat

9:30 pm - 2:45 pmEAS San Sebastián-BOS Boston Logan Intl

23h 15m2 stops Madrid Barajas Lisbon Humberto Delgado

$895Multiple Airlines

Sun, Oct 11 - Sun, Oct 18

8:00 pm - 8:50 pmBOS Boston Logan Intl-EAS San Sebastián

18h 50m1 stop Madrid Barajas

9:30 pm - 6:25 pmEAS San Sebastián-BOS Boston Logan Intl

26h 55m1 stop Madrid Barajas

$979Iberia

Wed, Nov 25 - Sun, Nov 29

5:28 pm - 8:40 amBOS Boston Logan Intl-EAS San Sebastián

33h 12m2 stops New York John F Kennedy Intl Madrid Barajas

9:20 am - 4:10 pmEAS San Sebastián-BOS Boston Logan Intl

12h 50m1 stop Madrid Barajas

$1,024Iberia

Sat, Oct 3 - Sun, Oct 11

Cheap last minute flights

Enter your travel dates to find the best prices.

7:35 pm - 5:15 pmBOS Boston Logan Intl-EAS San Sebastián

15h 40m1 stop London Heathrow

9:30 pm - 4:55 pmEAS San Sebastián-BOS Boston Logan Intl

25h 25m2 stops Madrid Barajas New York John F Kennedy Intl

$2,098British Airways

Sun, Sep 6 - Wed, Sep 16

7:35 pm - 5:15 pmBOS Boston Logan Intl-EAS San Sebastián

15h 40m1 stop London Heathrow

9:30 pm - 10:40 pmEAS San Sebastián-BOS Boston Logan Intl

31h 10m2 stops Madrid Barajas New York John F Kennedy Intl

$2,098British Airways

Sun, Sep 6 - Mon, Sep 14

7:35 pm - 5:15 pmBOS Boston Logan Intl-EAS San Sebastián

15h 40m1 stop London Heathrow

9:30 pm - 4:55 pmEAS San Sebastián-BOS Boston Logan Intl

25h 25m2 stops Madrid Barajas New York John F Kennedy Intl

$2,098British Airways

Sun, Sep 6 - Tue, Sep 15

7:35 pm - 5:15 pmBOS Boston Logan Intl-EAS San Sebastián

15h 40m1 stop London Heathrow

1:40 pm - 11:28 pmEAS San Sebastián-BOS Boston Logan Intl

15h 48m2 stops Madrid Barajas New York John F Kennedy Intl

$2,098British Airways

Sun, Sep 6 - Thu, Sep 17

7:35 pm - 5:15 pmBOS Boston Logan Intl-EAS San Sebastián

15h 40m1 stop London Heathrow

1:35 pm - 5:00 pmEAS San Sebastián-BOS Boston Logan Intl

33h 25m1 stop London City

$2,131British Airways

Sun, Sep 6 - Mon, Sep 14

11:35 pm - 5:20 pmBOS Boston Logan Intl-EAS San Sebastián

11h 45m1 stop Barcelona-El Prat

9:20 am - 4:10 pmEAS San Sebastián-BOS Boston Logan Intl

12h 50m1 stop Madrid Barajas

$2,148Iberia

Sun, Sep 6 - Wed, Sep 9

7:40 pm - 4:10 pmBOS Boston Logan Intl-EAS San Sebastián

14h 30m1 stop London Heathrow

1:35 pm - 12:35 pmEAS San Sebastián-BOS Boston Logan Intl

29h 00m1 stop London City

$2,171British Airways

Sat, Sep 5 - Mon, Sep 14

6:26 pm - 8:40 amBOS Boston Logan Intl-EAS San Sebastián

32h 14m2 stops New York John F Kennedy Intl Madrid Barajas

9:20 am - 11:28 pmEAS San Sebastián-BOS Boston Logan Intl

20h 08m2 stops Madrid Barajas New York John F Kennedy Intl

$2,200Finnair

Sun, Sep 6 - Thu, Sep 17

6:26 pm - 8:40 amBOS Boston Logan Intl-EAS San Sebastián

32h 14m2 stops New York John F Kennedy Intl Madrid Barajas

9:20 am - 11:28 pmEAS San Sebastián-BOS Boston Logan Intl

44h 08m2 stops Madrid Barajas New York John F Kennedy Intl

$2,211Finnair

Sun, Sep 6 - Tue, Sep 15

11:53 am - 8:40 amBOS Boston Logan Intl-EAS San Sebastián

14h 47m2 stops New York John F Kennedy Intl Madrid Barajas

9:05 am - 9:05 pmEAS San Sebastián-BOS Boston Logan Intl

18h 00m1 stop Barcelona-El Prat

$2,512Iberia

Sun, Sep 6 - Thu, Sep 10

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British Airways flights from Boston to San Sebastian

Our best British Airways deals on Boston to San Sebastian flight tickets

British Airways

Sep 27

BOS5:28 pmBoston Logan Intl

45h 22m

2 stops

EAS8:50 pmSan Sebastián

Oct 4

EAS9:30 pmSan Sebastián

31h 55m

2 stops

BOS11:25 pmBoston Logan Intl

$1,067

British Airways

Sep 6

BOS9:55 pmBoston Logan Intl

13h 20m

1 stop

EAS5:15 pmSan Sebastián

Sep 9

EAS9:30 pmSan Sebastián

28h 00m

2 stops

BOS7:30 pmBoston Logan Intl

$2,499

American Airlines flights from Boston to San Sebastian

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

American Airlines

Oct 13

BOS5:40 pmBoston Logan Intl

13h 20m

1 stop

EAS1:00 pmSan Sebastián

Oct 27

EAS9:20 amSan Sebastián

14h 40m

1 stop

BOS7:00 pmBoston Logan Intl

$957

American Airlines

Oct 20

BOS12:29 pmBoston Logan Intl

14h 11m

2 stops

EAS8:40 amSan Sebastián

Oct 25

EAS1:40 pmSan Sebastián

24h 56m

2 stops

BOS9:36 amBoston Logan Intl

$1,072

American Airlines

Oct 20

BOS12:29 pmBoston Logan Intl

14h 11m

2 stops

EAS8:40 amSan Sebastián

Oct 25

EAS1:40 pmSan Sebastián

24h 56m

2 stops

BOS9:36 amBoston Logan Intl

$1,073

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Thu 10/15

10:55 pm-8:20 am

1 stop27h 25m

San Sebastián

Thu 10/22

9:10 am-9:05 pm

1 stop17h 55m

$677

Quickest round-trip

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Sun 9/27

11:35 pm-5:20 pm

1 stop11h 45m

San Sebastián

Sun 10/4

8:55 am-9:45 pm

1 stop18h 50m

$722

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Thu 10/15

10:55 pm-8:20 am

1 stop27h 25m

San Sebastián

Thu 10/22

11:10 am-9:05 pm

2 stops15h 55m

$728

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Wed 9/30

10:55 pm-5:25 pm

1 stop12h 30m

San Sebastián

Wed 10/7

5:55 pm-9:05 pm

1 stop33h 10m

$790

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Wed 11/25

3:30 pm-1:35 pm

2 stops16h 05m

San Sebastián

Sun 11/29

6:10 pm-2:53 pm

3 stops26h 43m

$827

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Wed 11/25

3:30 pm-1:35 pm

2 stops16h 05m

San Sebastián

Sun 11/29

6:10 pm-7:55 pm

2 stops31h 45m

$870

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Tue 10/13

8:50 pm-8:35 am

2 stops29h 45m

San Sebastián

Tue 10/27

9:20 am-7:00 pm

1 stop14h 40m

$876

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Sun 10/11

11:35 pm-8:20 am

1 stop26h 45m

San Sebastián

Sun 10/18

9:30 pm-2:45 pm

2 stops23h 15m

$895

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Wed 11/25

8:00 pm-8:50 pm

1 stop18h 50m

San Sebastián

Sun 11/29

9:30 pm-6:25 pm

1 stop26h 55m

$979

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Sat 10/3

5:28 pm-8:40 am

2 stops33h 12m

San Sebastián

Sun 10/11

9:20 am-4:10 pm

1 stop12h 50m

$1,024

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted 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 typical price of a round-trip flight between Boston and San Sebastian?

Prices are currently low for flights on this route.

Typical prices usually range from $727 to $1,042.
The lowest price recently found on this route was $677.

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 February is also very affordable. Most momondo users find prices during this month for around $697.

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

Best Price Found	$367
Fastest flight time	9h 40m
Direct flights	None

The best one-way flight to San Sebastian from Boston in the past 72 hours is $367. The best round-trip flight deal from Boston to San Sebastian found on momondo in the last 72 hours is $677.

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

Frequently asked questions about flying from Boston to San Sebastian

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 September 2026, there is 1 operator 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 100% of all bookings.

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
Iberia	PriceFrom $522	Free Cancellation	Rating 7.0 3,245 reviews		Search Iberia flights

Irun

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.

An easier way to manage your San Sebastian trip

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Cheap flights from Boston to San Sebastian from $367

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to San Sebastian departing on 10/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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British Airways flights from Boston to San Sebastian

Our best British Airways deals on Boston to San Sebastian flight tickets

American Airlines flights from Boston to San Sebastian

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

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

What is the typical price of a round-trip flight between Boston and San Sebastian?

What is the cheapest month to fly to San Sebastian?

What is the cheapest airline that flies from Boston Logan Intl to San Sebastián?

What airlines fly to San Sebastian?

When to book flights from Boston to San Sebastian

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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Boston to San Sebastian

Best airlines flying from Boston to San Sebastian

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

Traveling to a place near San Sebastian?

Why use momondo?

An easier way to manage your San Sebastian trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Spain

Airports servicing Basque Country

Fly your favorite airline to San Sebastian

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to San Sebastian

List of cabin classes available on flights landing in San Sebastian. Availability may vary depending on flight origin and airline.

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Popular flights according to clicks in the last 7 days on momondo

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