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Cheap flights from Boston to San Sebastian from $337

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 8/3. 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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Find the cheapest flights from Boston to San Sebastian

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
11:34 am - 8:40 am
BOS
-
EAS
15h 06m
2 stops
Multiple Airlines Logo
9:30 pm - 7:50 pm
EAS
-
BOS
28h 20m
1 stop
$509Multiple Airlines
Mon, Apr 13 - Mon, Apr 20
Multiple Airlines Logo
9:20 pm - 8:40 am
BOS
-
EAS
29h 20m
1 stop
Multiple Airlines Logo
9:30 pm - 7:50 pm
EAS
-
BOS
28h 20m
1 stop
$510Multiple Airlines
Mon, Apr 13 - Mon, Apr 20
American Airlines Logo
11:34 am - 8:40 am
BOS
-
EAS
15h 06m
2 stops
American Airlines Logo
1:40 pm - 11:52 pm
EAS
-
BOS
16h 12m
2 stops
$571American Airlines
Fri, Apr 24 - Tue, Apr 28
Iberia Logo
11:34 am - 8:40 am
BOS
-
EAS
15h 06m
2 stops
Iberia Logo
9:30 pm - 4:10 pm
EAS
-
BOS
24h 40m
1 stop
$572Iberia
Fri, Apr 24 - Tue, Apr 28
Iberia Logo
5:40 pm - 8:50 pm
BOS
-
EAS
21h 10m
1 stop
Iberia Logo
9:30 pm - 4:10 pm
EAS
-
BOS
24h 40m
1 stop
$577Iberia
Fri, Apr 24 - Tue, Apr 28
Multiple Airlines Logo
6:05 pm - 8:50 pm
BOS
-
EAS
20h 45m
2 stops
Multiple Airlines Logo
1:40 pm - 8:20 pm
EAS
-
BOS
36h 40m
2 stops
$693Multiple Airlines
Mon, Apr 13 - Mon, Apr 20
Multiple Airlines Logo
4:45 pm - 5:20 pm
BOS
-
EAS
18h 35m
2 stops
Multiple Airlines Logo
8:55 am - 2:45 pm
EAS
-
BOS
35h 50m
2 stops
$748Multiple Airlines
Mon, May 18 - Wed, May 20
American Airlines Logo
3:17 pm - 1:00 pm
BOS
-
EAS
15h 43m
2 stops
American Airlines Logo
1:40 pm - 11:52 pm
EAS
-
BOS
16h 12m
2 stops
$845American Airlines
Thu, Apr 16 - Thu, Apr 23
Iberia Logo
9:20 pm - 8:40 am
BOS
-
EAS
29h 20m
1 stop
Iberia Logo
9:30 pm - 4:10 pm
EAS
-
BOS
24h 40m
1 stop
$851Iberia
Mon, Jul 20 - Sat, Aug 1
Multiple Airlines Logo
8:50 pm - 8:20 am
BOS
-
EAS
29h 30m
3 stops
Multiple Airlines Logo
5:55 pm - 8:20 pm
EAS
-
BOS
32h 25m
2 stops
$864Multiple Airlines
Mon, May 18 - Wed, May 20

American Airlines flights from Boston to San Sebastian

Our best American Airlines deals on Boston to San Sebastian flight tickets
American Airlines
Apr 24
BOS11:34 amBoston Logan Intl
15h 06m
2 stops
EAS8:40 amSan Sebastián
Apr 28
EAS1:40 pmSan Sebastián
16h 12m
2 stops
BOS11:52 pmBoston Logan Intl
$571
American Airlines
Apr 16
BOS3:17 pmBoston Logan Intl
15h 43m
2 stops
EAS1:00 pmSan Sebastián
Apr 23
EAS1:40 pmSan Sebastián
16h 12m
2 stops
BOS11:52 pmBoston Logan Intl
$845
American Airlines
Aug 8
BOS1:10 pmBoston Logan Intl
13h 30m
2 stops
EAS8:40 amSan Sebastián
Aug 15
EAS9:20 amSan Sebastián
16h 30m
1 stop
BOS7:50 pmBoston Logan Intl
$968

Iberia flights from Boston to San Sebastian

Our best Iberia deals on Boston to San Sebastian flight tickets
Iberia
Apr 24
BOS11:34 amBoston Logan Intl
15h 06m
2 stops
EAS8:40 amSan Sebastián
Apr 28
EAS9:30 pmSan Sebastián
24h 40m
1 stop
BOS4:10 pmBoston Logan Intl
$572
Iberia
Apr 24
BOS5:40 pmBoston Logan Intl
21h 10m
1 stop
EAS8:50 pmSan Sebastián
Apr 28
EAS9:30 pmSan Sebastián
24h 40m
1 stop
BOS4:10 pmBoston Logan Intl
$577
Iberia
Jul 20
BOS9:20 pmBoston Logan Intl
29h 20m
1 stop
EAS8:40 amSan Sebastián
Aug 1
EAS9:30 pmSan Sebastián
24h 40m
1 stop
BOS4:10 pmBoston Logan Intl
$851

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 March 3, 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

Mon 4/13

11:34 am-8:40 am

2 stops15h 06m

San Sebastián

Mon 4/20

9:30 pm-7:50 pm

1 stop28h 20m

$509

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Mon 4/13

9:20 pm-8:40 am

1 stop29h 20m

San Sebastián

Mon 4/20

9:30 pm-7:50 pm

1 stop28h 20m

$510

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Fri 4/24

11:34 am-8:40 am

2 stops15h 06m

San Sebastián

Tue 4/28

1:40 pm-11:52 pm

2 stops16h 12m

$571

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Fri 4/24

11:34 am-8:40 am

2 stops15h 06m

San Sebastián

Tue 4/28

9:30 pm-4:10 pm

1 stop24h 40m

$572

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Fri 4/24

5:40 pm-8:50 pm

1 stop21h 10m

San Sebastián

Tue 4/28

9:30 pm-4:10 pm

1 stop24h 40m

$577

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Mon 4/13

6:05 pm-8:50 pm

2 stops20h 45m

San Sebastián

Mon 4/20

1:40 pm-8:20 pm

2 stops36h 40m

$693

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Mon 5/18

4:45 pm-5:20 pm

2 stops18h 35m

San Sebastián

Wed 5/20

8:55 am-2:45 pm

2 stops35h 50m

$748

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Thu 4/16

3:17 pm-1:00 pm

2 stops15h 43m

San Sebastián

Thu 4/23

1:40 pm-11:52 pm

2 stops16h 12m

$845

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Mon 7/20

9:20 pm-8:40 am

1 stop29h 20m

San Sebastián

Sat 8/1

9:30 pm-4:10 pm

1 stop24h 40m

$851

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Mon 5/18

8:50 pm-8:20 am

3 stops29h 30m

San Sebastián

Wed 5/20

5:55 pm-8:20 pm

2 stops32h 25m

$864

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 $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

13h 30m

Direct flights

None
The fastest flight from Boston to San Sebastian takes 13h 30m
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 13h 30m, 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
7.1
11,375 reviews
Search American Airlines flights
IberiaPriceFrom $487Free CancellationRating
7.0
3,130 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

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