Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Boston to San Sebastian from $316

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 3/19. 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
4:45 pm - 8:40 am
BOS
-
EAS
9h 55m
1 stop
American Airlines Logo
9:20 am - 3:15 pm
EAS
-
BOS
11h 55m
1 stop
$451American Airlines
Mon, Feb 16 - Tue, Mar 3
Iberia Logo
4:45 pm - 8:40 am
BOS
-
EAS
9h 55m
1 stop
Iberia Logo
1:40 pm - 8:50 pm
EAS
-
BOS
12h 10m
1 stop
$452Iberia
Tue, Mar 3 - Tue, Mar 10
American Airlines Logo
11:55 am - 8:40 am
BOS
-
EAS
14h 45m
2 stops
American Airlines Logo
1:40 pm - 8:50 pm
EAS
-
BOS
12h 10m
1 stop
$457American Airlines
Tue, Mar 3 - Tue, Mar 10
American Airlines Logo
4:45 pm - 8:40 am
BOS
-
EAS
9h 55m
1 stop
American Airlines Logo
9:20 am - 10:48 pm
EAS
-
BOS
19h 28m
2 stops
$461American Airlines
Mon, Feb 16 - Tue, Mar 3
American Airlines Logo
6:00 am - 8:40 am
BOS
-
EAS
20h 40m
2 stops
American Airlines Logo
9:20 am - 10:48 pm
EAS
-
BOS
18h 28m
2 stops
$492American Airlines
Tue, Mar 3 - Tue, Mar 10
American Airlines Logo
6:25 am - 8:40 am
BOS
-
EAS
20h 15m
2 stops
American Airlines Logo
9:20 am - 10:48 pm
EAS
-
BOS
19h 28m
2 stops
$535American Airlines
Mon, Feb 16 - Tue, Mar 3
Iberia Logo
5:15 pm - 1:00 pm
BOS
-
EAS
13h 45m
2 stops
Iberia Logo
9:30 pm - 7:50 pm
EAS
-
BOS
28h 20m
1 stop
$745Iberia
Wed, Feb 25 - Sun, Mar 1
Iberia Logo
5:45 pm - 1:00 pm
BOS
-
EAS
14h 15m
1 stop
Iberia Logo
1:40 pm - 8:50 pm
EAS
-
BOS
12h 10m
1 stop
$790Iberia
Fri, Mar 20 - Fri, Mar 27
Iberia Logo
3:49 pm - 1:00 pm
BOS
-
EAS
16h 11m
2 stops
Iberia Logo
9:20 am - 4:15 pm
EAS
-
BOS
11h 55m
1 stop
$873Iberia
Fri, Mar 20 - Fri, Mar 27
Multiple Airlines Logo
6:05 pm - 1:30 pm
BOS
-
EAS
13h 25m
2 stops
Multiple Airlines Logo
2:05 pm - 11:59 pm
EAS
-
BOS
38h 54m
3 stops
$891Multiple Airlines
Tue, Mar 3 - Tue, Mar 10

Iberia flights from Boston to San Sebastian

Our best Iberia deals on Boston to San Sebastian flight tickets
Iberia
Mar 3
BOS4:45 pmBoston Logan Intl
9h 55m
1 stop
EAS8:40 amSan Sebastián
Mar 10
EAS1:40 pmSan Sebastián
12h 10m
1 stop
BOS8:50 pmBoston Logan Intl
$452
Iberia
Jul 15
BOS9:20 pmBoston Logan Intl
9h 40m
1 stop
EAS1:00 pmSan Sebastián
Jul 22
EAS9:20 amSan Sebastián
12h 50m
1 stop
BOS4:10 pmBoston Logan Intl
$652
Iberia
Feb 25
BOS5:15 pmBoston Logan Intl
13h 45m
2 stops
EAS1:00 pmSan Sebastián
Mar 1
EAS9:30 pmSan Sebastián
28h 20m
1 stop
BOS7:50 pmBoston Logan Intl
$745

American Airlines flights from Boston to San Sebastian

Our best American Airlines deals on Boston to San Sebastian flight tickets
American Airlines
Feb 16
BOS4:45 pmBoston Logan Intl
9h 55m
1 stop
EAS8:40 amSan Sebastián
Mar 3
EAS9:20 amSan Sebastián
11h 55m
1 stop
BOS3:15 pmBoston Logan Intl
$451
American Airlines
Mar 3
BOS11:55 amBoston Logan Intl
14h 45m
2 stops
EAS8:40 amSan Sebastián
Mar 10
EAS1:40 pmSan Sebastián
12h 10m
1 stop
BOS8:50 pmBoston Logan Intl
$457
American Airlines
Feb 16
BOS4:45 pmBoston Logan Intl
9h 55m
1 stop
EAS8:40 amSan Sebastián
Mar 3
EAS9:20 amSan Sebastián
19h 28m
2 stops
BOS10:48 pmBoston Logan Intl
$461

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 February 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 2/16

4:45 pm-8:40 am

1 stop9h 55m

San Sebastián

Tue 3/3

9:20 am-3:15 pm

1 stop11h 55m

$451

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Tue 3/3

4:45 pm-8:40 am

1 stop9h 55m

San Sebastián

Tue 3/10

1:40 pm-8:50 pm

1 stop12h 10m

$452

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Tue 3/3

11:55 am-8:40 am

2 stops14h 45m

San Sebastián

Tue 3/10

1:40 pm-8:50 pm

1 stop12h 10m

$457

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Mon 2/16

4:45 pm-8:40 am

1 stop9h 55m

San Sebastián

Tue 3/3

9:20 am-10:48 pm

2 stops19h 28m

$461

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Tue 3/3

6:00 am-8:40 am

2 stops20h 40m

San Sebastián

Tue 3/10

9:20 am-10:48 pm

2 stops18h 28m

$492

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Mon 2/16

6:25 am-8:40 am

2 stops20h 15m

San Sebastián

Tue 3/3

9:20 am-10:48 pm

2 stops19h 28m

$535

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Wed 2/25

5:15 pm-1:00 pm

2 stops13h 45m

San Sebastián

Sun 3/1

9:30 pm-7:50 pm

1 stop28h 20m

$745

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Fri 3/20

5:45 pm-1:00 pm

1 stop14h 15m

San Sebastián

Fri 3/27

1:40 pm-8:50 pm

1 stop12h 10m

$790

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Fri 3/20

3:49 pm-1:00 pm

2 stops16h 11m

San Sebastián

Fri 3/27

9:20 am-4:15 pm

1 stop11h 55m

$873

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Tue 3/3

6:05 pm-1:30 pm

2 stops13h 25m

San Sebastián

Tue 3/10

2:05 pm-11:59 pm

3 stops38h 54m

$891

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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
11,218 reviews
Search American Airlines flights
IberiaPriceFrom $487Free CancellationRating
7.0
3,103 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 3/5
Thu 3/12
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