Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Boston to San Sebastian from $366

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 4/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Boston to San Sebastian

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
9:20 pm - 1:00 pm
BOS
-
EAS
9h 40m1 stop
American Airlines Logo
1:40 pm - 7:50 pm
EAS
-
BOS
12h 10m1 stop
$419American Airlines
Wed, Feb 4 - Wed, Feb 11
American Airlines Logo
3:35 pm - 1:00 pm
BOS
-
EAS
15h 25m2 stops
American Airlines Logo
9:20 am - 7:50 pm
EAS
-
BOS
16h 30m1 stop
$423American Airlines
Wed, Feb 4 - Wed, Feb 11
American Airlines Logo
12:16 pm - 8:40 am
BOS
-
EAS
14h 24m2 stops
American Airlines Logo
1:40 pm - 10:56 pm
EAS
-
BOS
15h 16m2 stops
$433American Airlines
Wed, Feb 4 - Wed, Feb 11
Iberia Logo
4:45 pm - 8:40 am
BOS
-
EAS
9h 55m1 stop
Iberia Logo
9:20 am - 3:15 pm
EAS
-
BOS
11h 55m1 stop
$449Iberia
Tue, Feb 3 - Tue, Feb 10
Iberia Logo
12:16 pm - 8:40 am
BOS
-
EAS
14h 24m2 stops
Iberia Logo
9:20 am - 3:15 pm
EAS
-
BOS
11h 55m1 stop
$453Iberia
Tue, Feb 3 - Tue, Feb 10
Iberia Logo
12:16 pm - 8:40 am
BOS
-
EAS
14h 24m2 stops
Iberia Logo
9:20 am - 10:56 pm
EAS
-
BOS
19h 36m2 stops
$463Iberia
Tue, Feb 3 - Tue, Feb 10
Iberia Logo
11:55 am - 8:40 am
BOS
-
EAS
14h 45m2 stops
Iberia Logo
1:40 pm - 7:50 pm
EAS
-
BOS
12h 10m1 stop
$473Iberia
Thu, Feb 19 - Thu, Feb 26
Iberia Logo
11:55 am - 8:40 am
BOS
-
EAS
14h 45m2 stops
Iberia Logo
9:20 am - 10:48 pm
EAS
-
BOS
19h 28m2 stops
$483Iberia
Thu, Feb 19 - Thu, Feb 26
American Airlines Logo
3:49 pm - 1:00 pm
BOS
-
EAS
15h 11m2 stops
American Airlines Logo
9:20 am - 7:19 pm
EAS
-
BOS
14h 59m2 stops
$488American Airlines
Wed, Mar 4 - Wed, Mar 11
Iberia Logo
9:20 pm - 1:00 pm
BOS
-
EAS
9h 40m1 stop
Iberia Logo
1:40 pm - 7:50 pm
EAS
-
BOS
12h 10m1 stop
$494Iberia
Thu, Feb 19 - Thu, Feb 26

American Airlines flights from Boston to San Sebastian

Our best American Airlines deals on Boston to San Sebastian flight tickets
American Airlines
Feb 4
BOS9:20 pmBoston Logan Intl
9h 40m
1 stop
EAS1:00 pmSan Sebastián
Feb 11
EAS1:40 pmSan Sebastián
12h 10m
1 stop
BOS7:50 pmBoston Logan Intl
$419
Find similar
American Airlines
Feb 4
BOS3:35 pmBoston Logan Intl
15h 25m
2 stops
EAS1:00 pmSan Sebastián
Feb 11
EAS9:20 amSan Sebastián
16h 30m
1 stop
BOS7:50 pmBoston Logan Intl
$423
Find similar
American Airlines
Feb 4
BOS12:16 pmBoston Logan Intl
14h 24m
2 stops
EAS8:40 amSan Sebastián
Feb 11
EAS1:40 pmSan Sebastián
15h 16m
2 stops
BOS10:56 pmBoston Logan Intl
$433
Find similar

Iberia flights from Boston to San Sebastian

Our best Iberia deals on Boston to San Sebastian flight tickets
Iberia
Feb 3
BOS4:45 pmBoston Logan Intl
9h 55m
1 stop
EAS8:40 amSan Sebastián
Feb 10
EAS9:20 amSan Sebastián
11h 55m
1 stop
BOS3:15 pmBoston Logan Intl
$449
Find similar
Iberia
Feb 3
BOS12:16 pmBoston Logan Intl
14h 24m
2 stops
EAS8:40 amSan Sebastián
Feb 10
EAS9:20 amSan Sebastián
11h 55m
1 stop
BOS3:15 pmBoston Logan Intl
$453
Find similar
Iberia
Feb 3
BOS12:16 pmBoston Logan Intl
14h 24m
2 stops
EAS8:40 amSan Sebastián
Feb 10
EAS9:20 amSan Sebastián
19h 36m
2 stops
BOS10:56 pmBoston Logan Intl
$463
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated January 6, 2026.
Use the filters below to find and compare flights from Boston to San Sebastian that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Wed 2/4

9:20 pm-1:00 pm

1 stop9h 40m

San Sebastián

Wed 2/11

1:40 pm-7:50 pm

1 stop12h 10m

$419

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Wed 2/4

3:35 pm-1:00 pm

2 stops15h 25m

San Sebastián

Wed 2/11

9:20 am-7:50 pm

1 stop16h 30m

$423

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Wed 2/4

12:16 pm-8:40 am

2 stops14h 24m

San Sebastián

Wed 2/11

1:40 pm-10:56 pm

2 stops15h 16m

$433

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Tue 2/3

4:45 pm-8:40 am

1 stop9h 55m

San Sebastián

Tue 2/10

9:20 am-3:15 pm

1 stop11h 55m

$449

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Tue 2/3

12:16 pm-8:40 am

2 stops14h 24m

San Sebastián

Tue 2/10

9:20 am-3:15 pm

1 stop11h 55m

$453

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Tue 2/3

12:16 pm-8:40 am

2 stops14h 24m

San Sebastián

Tue 2/10

9:20 am-10:56 pm

2 stops19h 36m

$463

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Thu 2/19

11:55 am-8:40 am

2 stops14h 45m

San Sebastián

Thu 2/26

1:40 pm-7:50 pm

1 stop12h 10m

$473

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Thu 2/19

11:55 am-8:40 am

2 stops14h 45m

San Sebastián

Thu 2/26

9:20 am-10:48 pm

2 stops19h 28m

$483

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Wed 3/4

3:49 pm-1:00 pm

2 stops15h 11m

San Sebastián

Wed 3/11

9:20 am-7:19 pm

2 stops14h 59m

$488

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Thu 2/19

9:20 pm-1:00 pm

1 stop9h 40m

San Sebastián

Thu 2/26

1:40 pm-7:50 pm

1 stop12h 10m

$494

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

See travel insights to San Sebastian from

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

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 $572.

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 55m

Direct flights

None
The fastest flight from Boston to San Sebastian takes 9h 55m
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 55m, 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?

  • 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?

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 AirlinesPriceFrom $450Free CancellationRating
7.2
11,083 reviews
Search American Airlines flights
IberiaPriceFrom $487Free CancellationRating
7.0
3,073 reviews
Search Iberia flights

Traveling to a place near San Sebastian?

Book flights to San Sebastian if you plan to visit one of these locations
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.

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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 2/5
Thu 2/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Spain

Airports servicing Basque Country

Bilbao Airport