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Cheap flights from Boston to San Sebastian from $445

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to San Sebastian departing on 11/30. 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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0 bags

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Cheap round-trip flights

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American Airlines Logo
9:20 pm - 8:50 pmBOS-EAS
17h 30m1 stop
American Airlines Logo
9:20 am - 3:15 pmEAS-BOS
11h 55m1 stop
$445American Airlines
Find Deal
Sun, Nov 30 - Tue, Dec 16
American Airlines Logo
4:45 pm - 1:00 pmBOS-EAS
14h 15m1 stop
American Airlines Logo
9:20 am - 6:52 pmEAS-BOS
15h 32m2 stops
$451American Airlines
Find Deal
Sun, Nov 30 - Tue, Dec 16
Iberia Logo
9:20 pm - 8:40 amBOS-EAS
29h 20m1 stop
Iberia Logo
9:20 am - 3:15 pmEAS-BOS
11h 55m1 stop
$454Iberia
Find Deal
Sun, Nov 30 - Tue, Dec 16
American Airlines Logo
4:45 pm - 8:50 pmBOS-EAS
22h 05m1 stop
American Airlines Logo
1:40 pm - 10:54 pmEAS-BOS
15h 14m2 stops
$460American Airlines
Find Deal
Sun, Nov 30 - Tue, Dec 16
Iberia Logo
4:45 pm - 8:50 pmBOS-EAS
22h 05m1 stop
Iberia Logo
1:40 pm - 10:54 pmEAS-BOS
15h 14m2 stops
$464Iberia
Find Deal
Sun, Nov 30 - Tue, Dec 16
Iberia Logo
9:20 pm - 1:00 pmBOS-EAS
9h 40m1 stop
Iberia Logo
9:20 am - 6:47 pmEAS-BOS
15h 27m2 stops
$636Iberia
Find Deal
Mon, Nov 17 - Thu, Nov 20
Iberia Logo
9:20 pm - 1:00 pmBOS-EAS
9h 40m1 stop
Iberia Logo
9:30 pm - 3:15 pmEAS-BOS
23h 45m1 stop
$637Iberia
Find Deal
Mon, Nov 17 - Thu, Nov 20
Iberia Logo
11:56 am - 8:40 amBOS-EAS
14h 44m2 stops
Iberia Logo
9:20 am - 6:47 pmEAS-BOS
15h 27m2 stops
$641Iberia
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Mon, Nov 17 - Thu, Nov 20
Multiple Airlines Logo
4:45 pm - 8:40 amBOS-EAS
9h 55m1 stop
Multiple Airlines Logo
9:20 am - 3:15 pmEAS-BOS
11h 55m1 stop
$645Multiple Airlines
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Sun, Nov 30 - Tue, Dec 16
Iberia Logo
3:47 pm - 1:00 pmBOS-EAS
15h 13m2 stops
Iberia Logo
9:30 pm - 6:47 pmEAS-BOS
27h 17m2 stops
$651Iberia
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Sun, Nov 16 - Wed, Nov 19

American Airlines flights from Boston to San Sebastian

Our best American Airlines deals on Boston to San Sebastian flight tickets
American Airlines
Nov 30
BOS9:20 pmBoston Logan Intl
17h 30m
1 stop
EAS8:50 pmSan Sebastián
Dec 16
EAS9:20 amSan Sebastián
11h 55m
1 stop
BOS3:15 pmBoston Logan Intl
$445
Find similar
American Airlines
Nov 30
BOS4:45 pmBoston Logan Intl
14h 15m
1 stop
EAS1:00 pmSan Sebastián
Dec 16
EAS9:20 amSan Sebastián
15h 32m
2 stops
BOS6:52 pmBoston Logan Intl
$451
Find similar
American Airlines
Nov 30
BOS4:45 pmBoston Logan Intl
22h 05m
1 stop
EAS8:50 pmSan Sebastián
Dec 16
EAS1:40 pmSan Sebastián
15h 14m
2 stops
BOS10:54 pmBoston Logan Intl
$460
Find similar

Iberia flights from Boston to San Sebastian

Our best Iberia deals on Boston to San Sebastian flight tickets
Iberia
Nov 30
BOS9:20 pmBoston Logan Intl
29h 20m
1 stop
EAS8:40 amSan Sebastián
Dec 16
EAS9:20 amSan Sebastián
11h 55m
1 stop
BOS3:15 pmBoston Logan Intl
$454
Find similar
Iberia
Nov 30
BOS4:45 pmBoston Logan Intl
22h 05m
1 stop
EAS8:50 pmSan Sebastián
Dec 16
EAS1:40 pmSan Sebastián
15h 14m
2 stops
BOS10:54 pmBoston Logan Intl
$464
Find similar
Iberia
Nov 17
BOS9:20 pmBoston Logan Intl
9h 40m
1 stop
EAS1:00 pmSan Sebastián
Nov 20
EAS9:20 amSan Sebastián
15h 27m
2 stops
BOS6:47 pmBoston Logan Intl
$636
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 November 4, 2025.
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

Sun 11/30

9:20 pm-8:50 pm

1 stop17h 30m

San Sebastián

Tue 12/16

9:20 am-3:15 pm

1 stop11h 55m

$445

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sun 11/30

4:45 pm-1:00 pm

1 stop14h 15m

San Sebastián

Tue 12/16

9:20 am-6:52 pm

2 stops15h 32m

$451

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sun 11/30

9:20 pm-8:40 am

1 stop29h 20m

San Sebastián

Tue 12/16

9:20 am-3:15 pm

1 stop11h 55m

$454

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sun 11/30

4:45 pm-8:50 pm

1 stop22h 05m

San Sebastián

Tue 12/16

1:40 pm-10:54 pm

2 stops15h 14m

$460

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sun 11/30

4:45 pm-8:50 pm

1 stop22h 05m

San Sebastián

Tue 12/16

1:40 pm-10:54 pm

2 stops15h 14m

$464

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Mon 11/17

9:20 pm-1:00 pm

1 stop9h 40m

San Sebastián

Thu 11/20

9:20 am-6:47 pm

2 stops15h 27m

$636

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Mon 11/17

9:20 pm-1:00 pm

1 stop9h 40m

San Sebastián

Thu 11/20

9:30 pm-3:15 pm

1 stop23h 45m

$637

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Mon 11/17

11:56 am-8:40 am

2 stops14h 44m

San Sebastián

Thu 11/20

9:20 am-6:47 pm

2 stops15h 27m

$641

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sun 11/30

4:45 pm-8:40 am

1 stop9h 55m

San Sebastián

Tue 12/16

9:20 am-3:15 pm

1 stop11h 55m

$645

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sun 11/16

3:47 pm-1:00 pm

2 stops15h 13m

San Sebastián

Wed 11/19

9:30 pm-6:47 pm

2 stops27h 17m

$651

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 11 resultsSorted by cheapest first
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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 $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

Direct flights

None
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?

  • 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
11,038 reviews
Search American Airlines flights
IberiaPriceFrom $522Free CancellationRating
7.0
3,006 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.

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