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Cheap flights from Washington to San Sebastian from $380

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to San Sebastian departing on 9/13. 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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Find the cheapest flights from Washington to San Sebastian

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
8:10 am - 8:50 pm
SEA
-
EAS
27h 40m
2 stops
British Airways Logo
9:30 pm - 7:24 pm
EAS
-
SEA
30h 54m
2 stops
$979British Airways
Fri, Sep 4 - Tue, Sep 22
Iberia Logo
2:06 pm - 8:40 am
SEA
-
EAS
33h 34m
2 stops
Iberia Logo
9:20 am - 8:52 pm
EAS
-
SEA
20h 32m
2 stops
$1,073Iberia
Sun, Aug 16 - Thu, Aug 20
British Airways Logo
8:20 am - 1:00 pm
SEA
-
EAS
19h 40m
2 stops
British Airways Logo
1:40 pm - 12:15 am
EAS
-
SEA
19h 35m
2 stops
$1,090British Airways
Fri, Oct 16 - Tue, Oct 20
Iberia Logo
1:30 pm - 5:20 pm
SEA
-
EAS
18h 50m
2 stops
Iberia Logo
9:20 am - 8:44 pm
EAS
-
SEA
20h 24m
2 stops
$1,096Iberia
Tue, Sep 15 - Wed, Sep 23
Iberia Logo
1:30 pm - 8:40 am
SEA
-
EAS
34h 10m
2 stops
Iberia Logo
9:30 pm - 5:10 pm
EAS
-
SEA
28h 40m
2 stops
$1,098Iberia
Mon, Sep 14 - Tue, Sep 22
Iberia Logo
1:30 pm - 5:20 pm
SEA
-
EAS
18h 50m
2 stops
Iberia Logo
9:30 pm - 5:10 pm
EAS
-
SEA
28h 40m
2 stops
$1,099Iberia
Tue, Sep 15 - Mon, Sep 21
American Airlines Logo
10:35 pm - 8:40 am
SEA
-
EAS
25h 05m
2 stops
American Airlines Logo
9:20 am - 8:39 pm
EAS
-
SEA
20h 19m
2 stops
$1,101American Airlines
Sun, Sep 13 - Thu, Sep 24
Iberia Logo
1:30 pm - 5:20 pm
SEA
-
EAS
18h 50m
2 stops
Iberia Logo
5:55 pm - 11:35 am
EAS
-
SEA
26h 40m
2 stops
$1,102Iberia
Tue, Sep 15 - Tue, Sep 22
British Airways Logo
1:30 pm - 1:00 pm
SEA
-
EAS
38h 30m
2 stops
British Airways Logo
9:30 pm - 9:09 pm
EAS
-
SEA
56h 39m
2 stops
$1,104British Airways
Wed, Sep 16 - Tue, Sep 22
Iberia Logo
3:12 pm - 8:40 am
SEA
-
EAS
32h 28m
2 stops
Iberia Logo
9:20 am - 8:44 pm
EAS
-
SEA
20h 24m
2 stops
$1,107Iberia
Mon, Sep 14 - Wed, Sep 23

British Airways flights from State of Washington to San Sebastian

Our best British Airways deals on State of Washington to San Sebastian flight tickets
British Airways
Sep 4
SEA8:10 amSeattle/Tacoma Intl
27h 40m
2 stops
EAS8:50 pmSan Sebastián
Sep 22
EAS9:30 pmSan Sebastián
30h 54m
2 stops
SEA7:24 pmSeattle/Tacoma Intl
$979
British Airways
Oct 16
SEA8:20 amSeattle/Tacoma Intl
19h 40m
2 stops
EAS1:00 pmSan Sebastián
Oct 20
EAS1:40 pmSan Sebastián
19h 35m
2 stops
SEA12:15 amSeattle/Tacoma Intl
$1,090
British Airways
Sep 16
SEA1:30 pmSeattle/Tacoma Intl
38h 30m
2 stops
EAS1:00 pmSan Sebastián
Sep 22
EAS9:30 pmSan Sebastián
56h 39m
2 stops
SEA9:09 pmSeattle/Tacoma Intl
$1,104

Iberia flights from State of Washington to San Sebastian

Our best Iberia deals on State of Washington to San Sebastian flight tickets
Iberia
Aug 16
SEA2:06 pmSeattle/Tacoma Intl
33h 34m
2 stops
EAS8:40 amSan Sebastián
Aug 20
EAS9:20 amSan Sebastián
20h 32m
2 stops
SEA8:52 pmSeattle/Tacoma Intl
$1,073
Iberia
Sep 15
SEA1:30 pmSeattle/Tacoma Intl
18h 50m
2 stops
EAS5:20 pmSan Sebastián
Sep 23
EAS9:20 amSan Sebastián
20h 24m
2 stops
SEA8:44 pmSeattle/Tacoma Intl
$1,096
Iberia
Sep 14
SEA1:30 pmSeattle/Tacoma Intl
34h 10m
2 stops
EAS8:40 amSan Sebastián
Sep 22
EAS9:30 pmSan Sebastián
28h 40m
2 stops
SEA5:10 pmSeattle/Tacoma Intl
$1,098

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington 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 May 10, 2026.
Use the filters below to find and compare flights from Washington to San Sebastian that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 9/4

8:10 am-8:50 pm

2 stops27h 40m

San Sebastián

Tue 9/22

9:30 pm-7:24 pm

2 stops30h 54m

$979

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sun 8/16

2:06 pm-8:40 am

2 stops33h 34m

San Sebastián

Thu 8/20

9:20 am-8:52 pm

2 stops20h 32m

$1,073

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 10/16

8:20 am-1:00 pm

2 stops19h 40m

San Sebastián

Tue 10/20

1:40 pm-12:15 am

2 stops19h 35m

$1,090
Quickest round-trip

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Tue 9/15

1:30 pm-5:20 pm

2 stops18h 50m

San Sebastián

Wed 9/23

9:20 am-8:44 pm

2 stops20h 24m

$1,096

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Mon 9/14

1:30 pm-8:40 am

2 stops34h 10m

San Sebastián

Tue 9/22

9:30 pm-5:10 pm

2 stops28h 40m

$1,098

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Tue 9/15

1:30 pm-5:20 pm

2 stops18h 50m

San Sebastián

Mon 9/21

9:30 pm-5:10 pm

2 stops28h 40m

$1,099

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sun 9/13

10:35 pm-8:40 am

2 stops25h 05m

San Sebastián

Thu 9/24

9:20 am-8:39 pm

2 stops20h 19m

$1,101

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Tue 9/15

1:30 pm-5:20 pm

2 stops18h 50m

San Sebastián

Tue 9/22

5:55 pm-11:35 am

2 stops26h 40m

$1,102

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Wed 9/16

1:30 pm-1:00 pm

2 stops38h 30m

San Sebastián

Tue 9/22

9:30 pm-9:09 pm

2 stops56h 39m

$1,104

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Mon 9/14

3:12 pm-8:40 am

2 stops32h 28m

San Sebastián

Wed 9/23

9:20 am-8:44 pm

2 stops20h 24m

$1,107

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 State of Washington 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 airlines fly to San Sebastian?

Lufthansa, Delta and KLM are the top three most popular airlines that fly to San Sebastian from State of Washington according to our data. Lufthansa is the first choice among our users, with 52% of people opting to fly with this airline when traveling to San Sebastian. Keep in mind that there are 4 different airlines that fly to San Sebastian on a routine basis, so you have a few additional options to choose from.

Cheap State of Washington to San Sebastian flight deals and tips

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

Fastest flight time

19h 40m

Direct flights

None
The fastest flight from State of Washington to San Sebastian takes 19h 40m
There are no direct flights from State of Washington to San Sebastian. There are no popular flight routes from State of Washington to San Sebastian.
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Frequently asked questions about flying from Washington to San Sebastian

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

    Prices for flights from Washington to San Sebastián Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Washington 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 Washington 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.

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 Washington to San Sebastian?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington to San Sebastian for you.

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

All flight searches from Washington to San Sebastian on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Washington and San Sebastian by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Price alerts on flights to San Sebastian from Washington are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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