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Cheap flights from Massachusetts to San Sebastian from $320

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Massachusetts to San Sebastian departing on 10/4. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Massachusetts to San Sebastian

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
11:35 pm - 8:20 amBOS  Boston Logan Intl-EAS San Sebastián
26h 45m1 stop Barcelona-El Prat
Multiple Airlines Logo
5:55 pm - 9:05 pmEAS  San Sebastián-BOS Boston Logan Intl
33h 10m1 stop Barcelona-El Prat
$687Multiple Airlines
Sun, Oct 11 - Tue, Oct 20
LEVEL Logo
10:55 pm - 8:20 amBOS  Boston Logan Intl-EAS San Sebastián
27h 25m1 stop Barcelona-El Prat
LEVEL Logo
9:10 am - 9:05 pmEAS  San Sebastián-BOS Boston Logan Intl
17h 55m1 stop Barcelona-El Prat
$693LEVEL
Thu, Sep 24 - Thu, Oct 1
Multiple Airlines Logo
11:35 pm - 8:20 amBOS  Boston Logan Intl-EAS San Sebastián
26h 45m1 stop Barcelona-El Prat
Multiple Airlines Logo
9:30 pm - 9:05 pmEAS  San Sebastián-BOS Boston Logan Intl
29h 35m2 stops Madrid Barajas Barcelona-El Prat
$717Multiple Airlines
Sun, Oct 11 - Tue, Oct 20
Multiple Airlines Logo
10:55 pm - 8:20 amBOS  Boston Logan Intl-EAS San Sebastián
27h 25m1 stop Barcelona-El Prat
Multiple Airlines Logo
5:55 pm - 9:05 pmEAS  San Sebastián-BOS Boston Logan Intl
33h 10m1 stop Barcelona-El Prat
$751Multiple Airlines
Wed, Sep 30 - Tue, Oct 6
American Airlines Logo
9:05 pm - 1:00 pmBOS  Boston Logan Intl-EAS San Sebastián
9h 55m1 stop Madrid Barajas
American Airlines Logo
9:20 am - 7:50 pmEAS  San Sebastián-BOS Boston Logan Intl
16h 30m1 stop Madrid Barajas
$957American Airlines
Wed, Sep 30 - Tue, Oct 6
American Airlines Logo
11:12 am - 8:40 amBOS  Boston Logan Intl-EAS San Sebastián
15h 28m2 stops Philadelphia Madrid Barajas
American Airlines Logo
9:20 am - 7:50 pmEAS  San Sebastián-BOS Boston Logan Intl
16h 30m1 stop Madrid Barajas
$961American Airlines
Wed, Sep 30 - Tue, Oct 6
American Airlines Logo
11:35 am - 8:40 amBOS  Boston Logan Intl-EAS San Sebastián
15h 05m2 stops New York John F Kennedy Intl Madrid Barajas
American Airlines Logo
1:40 pm - 11:25 pmEAS  San Sebastián-BOS Boston Logan Intl
15h 45m2 stops Madrid Barajas New York John F Kennedy Intl
$1,022American Airlines
Wed, Sep 30 - Tue, Oct 6
Iberia Logo
5:28 pm - 8:40 amBOS  Boston Logan Intl-EAS San Sebastián
33h 12m2 stops New York John F Kennedy Intl Madrid Barajas
Iberia Logo
9:30 pm - 4:10 pmEAS  San Sebastián-BOS Boston Logan Intl
24h 40m1 stop Madrid Barajas
$1,033Iberia
Sat, Sep 26 - Sat, Oct 3
Iberia Logo
11:35 am - 8:40 amBOS  Boston Logan Intl-EAS San Sebastián
15h 05m2 stops New York John F Kennedy Intl Madrid Barajas
Iberia Logo
9:20 am - 7:45 pmEAS  San Sebastián-BOS Boston Logan Intl
16h 25m1 stop Madrid Barajas
$1,046Iberia
Wed, Sep 16 - Sun, Sep 20
Iberia Logo
9:20 pm - 8:50 pmBOS  Boston Logan Intl-EAS San Sebastián
17h 30m1 stop Madrid Barajas
Iberia Logo
9:30 pm - 4:10 pmEAS  San Sebastián-BOS Boston Logan Intl
24h 40m1 stop Madrid Barajas
$1,053Iberia
Tue, Sep 8 - Sun, Sep 20

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LEVEL flights from Massachusetts to San Sebastian

Our best LEVEL deals on Massachusetts to San Sebastian flight tickets
LEVEL
Sep 24
BOS10:55 pmBoston Logan Intl
27h 25m
1 stop
EAS8:20 amSan Sebastián
Oct 1
EAS9:10 amSan Sebastián
17h 55m
1 stop
BOS9:05 pmBoston Logan Intl
$693
LEVEL
Sep 9
BOS10:55 pmBoston Logan Intl
12h 25m
1 stop
EAS5:20 pmSan Sebastián
Sep 13
EAS8:55 amSan Sebastián
18h 50m
1 stop
BOS9:45 pmBoston Logan Intl
$867

American Airlines flights from Massachusetts to San Sebastian

Our best American Airlines deals on Massachusetts to San Sebastian flight tickets
American Airlines
Sep 30
BOS9:05 pmBoston Logan Intl
9h 55m
1 stop
EAS1:00 pmSan Sebastián
Oct 6
EAS9:20 amSan Sebastián
16h 30m
1 stop
BOS7:50 pmBoston Logan Intl
$957
American Airlines
Sep 30
BOS11:12 amBoston Logan Intl
15h 28m
2 stops
EAS8:40 amSan Sebastián
Oct 6
EAS9:20 amSan Sebastián
16h 30m
1 stop
BOS7:50 pmBoston Logan Intl
$961
American Airlines
Sep 16
BOS9:05 pmBoston Logan Intl
14h 30m
1 stop
EAS5:35 pmSan Sebastián
Sep 20
EAS9:20 amSan Sebastián
16h 25m
1 stop
BOS7:45 pmBoston Logan Intl
$1,042

momondo Fare Finder

 
Customize your flight search to find flights from Massachusetts 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 15, 2026.
Use the filters below to find and compare flights from Massachusetts to San Sebastian that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Sun 10/11

11:35 pm-8:20 am

1 stop26h 45m

San Sebastián

Tue 10/20

5:55 pm-9:05 pm

1 stop33h 10m

$687

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Thu 9/24

10:55 pm-8:20 am

1 stop27h 25m

San Sebastián

Thu 10/1

9:10 am-9:05 pm

1 stop17h 55m

$693

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Sun 10/11

11:35 pm-8:20 am

1 stop26h 45m

San Sebastián

Tue 10/20

9:30 pm-9:05 pm

2 stops29h 35m

$717

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Wed 9/30

10:55 pm-8:20 am

1 stop27h 25m

San Sebastián

Tue 10/6

5:55 pm-9:05 pm

1 stop33h 10m

$751
Quickest round-trip

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Wed 9/30

9:05 pm-1:00 pm

1 stop9h 55m

San Sebastián

Tue 10/6

9:20 am-7:50 pm

1 stop16h 30m

$957

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Wed 9/30

11:12 am-8:40 am

2 stops15h 28m

San Sebastián

Tue 10/6

9:20 am-7:50 pm

1 stop16h 30m

$961

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Wed 9/30

11:35 am-8:40 am

2 stops15h 05m

San Sebastián

Tue 10/6

1:40 pm-11:25 pm

2 stops15h 45m

$1,022

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Sat 9/26

5:28 pm-8:40 am

2 stops33h 12m

San Sebastián

Sat 10/3

9:30 pm-4:10 pm

1 stop24h 40m

$1,033

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Wed 9/16

11:35 am-8:40 am

2 stops15h 05m

San Sebastián

Sun 9/20

9:20 am-7:45 pm

1 stop16h 25m

$1,046

BostonSan Sebastian

BOS Boston Logan Intl - EAS San Sebastián

BOSEAS

Boston Logan Intl

Tue 9/8

9:20 pm-8:50 pm

1 stop17h 30m

San Sebastián

Sun 9/20

9:30 pm-4:10 pm

1 stop24h 40m

$1,053

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 Massachusetts 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 Massachusetts, with most prices found around $517. If you are unable to visit San Sebastian during the month of November, then departing from Massachusetts during the month October is also very affordable. Most momondo users find prices during this month for around $587.

Cheap Massachusetts to San Sebastian flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Massachusetts to San Sebastian

Fastest flight time

9h 55m

Direct flights

None
The fastest flight from Massachusetts to San Sebastian takes 9h 55m
There are no direct flights from Massachusetts to San Sebastian. There are no popular flight routes from Massachusetts to San Sebastian.
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Frequently asked questions about flying from Massachusetts to San Sebastian

  • When did momondo last update prices for flights from Massachusetts to San Sebastián Airport?

    Prices for flights from Massachusetts to San Sebastián Airport refresh daily.

  • How many operators does momondo search for flights from Massachusetts to San Sebastián Airport?

  • How old do you have to be to fly from Massachusetts to San Sebastián Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Massachusetts to San Sebastián Airport.

  • What documentation or ID do you need to fly to San Sebastián Airport?

    The travel and health documents required for your trip to San Sebastián Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at San Sebastián Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Massachusetts to San Sebastian

Compare and see reviews for airlines that fly from Massachusetts to San Sebastian with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $447Free CancellationRating
7.1
11,939 reviews
Search American Airlines flights
IberiaPriceFrom $487Free CancellationRating
7.0
3,256 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
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Why use momondo?

Why should I use momondo to find a flight deal from Massachusetts to San Sebastian?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Massachusetts to San Sebastian. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Massachusetts to San Sebastian with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to San Sebastian from Massachusetts with this policy.

How can momondo help me find flights from Massachusetts to San Sebastian?

Once you have performed a search for Massachusetts to San Sebastian flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Massachusetts to San Sebastian right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Massachusetts 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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