Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Boston to San Sebastian from $289

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 9/16. 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 (BOS-EAS)

Cheap round-trip flights

Iberia Logo
4:30 pm - 8:40 amBOS-EAS
10h 10m1 stop
Iberia Logo
9:20 am - 7:50 pmEAS-BOS
16h 30m1 stop
$447Iberia
Find Deal
Wed, Oct 1 - Wed, Oct 8
American Airlines Logo
4:30 pm - 8:40 amBOS-EAS
10h 10m1 stop
American Airlines Logo
9:20 am - 3:00 pmEAS-BOS
11h 40m1 stop
$449American Airlines
Find Deal
Sun, Sep 28 - Tue, Oct 14
American Airlines Logo
1:00 pm - 8:40 amBOS-EAS
13h 40m2 stops
American Airlines Logo
9:20 am - 3:00 pmEAS-BOS
11h 40m1 stop
$453American Airlines
Find Deal
Sun, Sep 28 - Tue, Oct 14
Iberia Logo
4:30 pm - 8:50 pmBOS-EAS
22h 20m1 stop
Iberia Logo
1:30 pm - 9:15 pmEAS-BOS
13h 45m1 stop
$455Iberia
Find Deal
Sun, Sep 28 - Tue, Oct 14
Logo
4:30 pm - 8:40 amBOS-EAS
10h 10m1 stop
Logo
9:30 pm - 10:19 pmEAS-BOS
30h 49m2 stops
$457
Find Deal
Wed, Oct 15 - Mon, Oct 20
Logo
4:30 pm - 8:40 amBOS-EAS
10h 10m1 stop
Logo
9:30 pm - 3:00 pmEAS-BOS
23h 30m1 stop
$458
Find Deal
Wed, Oct 15 - Mon, Oct 20
Iberia Logo
4:30 pm - 8:40 amBOS-EAS
10h 10m1 stop
Iberia Logo
1:30 pm - 9:15 pmEAS-BOS
13h 45m1 stop
$469Iberia
Find Deal
Tue, Sep 16 - Tue, Oct 7
Logo
7:40 pm - 8:40 amBOS-EAS
31h 00m2 stops
Logo
9:30 pm - 3:00 pmEAS-BOS
23h 30m1 stop
$478
Find Deal
Wed, Oct 1 - Wed, Oct 8
Iberia Logo
11:40 pm - 8:40 amBOS-EAS
27h 00m2 stops
Iberia Logo
1:30 pm - 9:15 pmEAS-BOS
13h 45m1 stop
$484Iberia
Find Deal
Tue, Sep 16 - Tue, Oct 7
Iberia Logo
4:30 pm - 8:40 amBOS-EAS
10h 10m1 stop
Iberia Logo
9:20 am - 3:00 pmEAS-BOS
11h 40m1 stop
$497Iberia
Find Deal
Wed, Oct 15 - Mon, Oct 20

Iberia flights from Boston to San Sebastian

Our best Iberia deals on Boston to San Sebastian flight tickets
Iberia
Oct 1
BOS4:30 pmBoston Logan Intl
10h 10m
1 stop
EAS8:40 amSan Sebastián
Oct 8
EAS9:20 amSan Sebastián
16h 30m
1 stop
BOS7:50 pmBoston Logan Intl
$447
Find similar
Iberia
Sep 28
BOS4:30 pmBoston Logan Intl
22h 20m
1 stop
EAS8:50 pmSan Sebastián
Oct 14
EAS1:30 pmSan Sebastián
13h 45m
1 stop
BOS9:15 pmBoston Logan Intl
$455
Find similar
Iberia
Sep 16
BOS4:30 pmBoston Logan Intl
10h 10m
1 stop
EAS8:40 amSan Sebastián
Oct 7
EAS1:30 pmSan Sebastián
13h 45m
1 stop
BOS9:15 pmBoston Logan Intl
$469
Find similar

American Airlines flights from Boston to San Sebastian

Our best American Airlines deals on Boston to San Sebastian flight tickets
American Airlines
Sep 28
BOS4:30 pmBoston Logan Intl
10h 10m
1 stop
EAS8:40 amSan Sebastián
Oct 14
EAS9:20 amSan Sebastián
11h 40m
1 stop
BOS3:00 pmBoston Logan Intl
$449
Find similar
American Airlines
Sep 28
BOS1:00 pmBoston Logan Intl
13h 40m
2 stops
EAS8:40 amSan Sebastián
Oct 14
EAS9:20 amSan Sebastián
11h 40m
1 stop
BOS3:00 pmBoston Logan Intl
$453
Find similar
American Airlines
Oct 15
BOS3:00 pmBoston Logan Intl
16h 00m
2 stops
EAS1:00 pmSan Sebastián
Oct 20
EAS9:20 amSan Sebastián
17h 47m
2 stops
BOS9:07 pmBoston Logan Intl
$547
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 August 18, 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

Wed 10/1

4:30 pm-8:40 am

1 stop10h 10m

San Sebastián

Wed 10/8

9:20 am-7:50 pm

1 stop16h 30m

$447

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sun 9/28

4:30 pm-8:40 am

1 stop10h 10m

San Sebastián

Tue 10/14

9:20 am-3:00 pm

1 stop11h 40m

$449

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sun 9/28

1:00 pm-8:40 am

2 stops13h 40m

San Sebastián

Tue 10/14

9:20 am-3:00 pm

1 stop11h 40m

$453

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Sun 9/28

4:30 pm-8:50 pm

1 stop22h 20m

San Sebastián

Tue 10/14

1:30 pm-9:15 pm

1 stop13h 45m

$455

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Wed 10/15

4:30 pm-8:40 am

1 stop10h 10m

San Sebastián

Mon 10/20

9:30 pm-10:19 pm

2 stops30h 49m

$457

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Wed 10/15

4:30 pm-8:40 am

1 stop10h 10m

San Sebastián

Mon 10/20

9:30 pm-3:00 pm

1 stop23h 30m

$458

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Tue 9/16

4:30 pm-8:40 am

1 stop10h 10m

San Sebastián

Tue 10/7

1:30 pm-9:15 pm

1 stop13h 45m

$469

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Wed 10/1

7:40 pm-8:40 am

2 stops31h 00m

San Sebastián

Wed 10/8

9:30 pm-3:00 pm

1 stop23h 30m

$478

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Tue 9/16

11:40 pm-8:40 am

2 stops27h 00m

San Sebastián

Tue 10/7

1:30 pm-9:15 pm

1 stop13h 45m

$484

BostonSan Sebastian

BOS - EAS

BOSEAS

Boston Logan Intl

Wed 10/15

4:30 pm-8:40 am

1 stop10h 10m

San Sebastián

Mon 10/20

9:20 am-3:00 pm

1 stop11h 40m

$497

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 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

Best Price Found

$289

Fastest flight time

10h 10m

Direct flights

None

Airports in San Sebastian

1 airport
The best one-way flight to San Sebastian from Boston in the past 72 hours is $289. The best round-trip flight deal from Boston to San Sebastian found on momondo in the last 72 hours is $447.
The fastest flight from Boston to San Sebastian takes 10h 10m
There are no direct flights from Boston to San Sebastian. Popular non-direct route for this connection is Boston Logan Intl Airport - San Sebastián Airport.
There is 1 airport near San Sebastian: San Sebastián (EAS)
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 10h 10m, 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 $492Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
IberiaPriceFrom $564Free CancellationRating
7.0
2,884 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
Sat 8/23
Sat 8/30
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