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Cheap flights from Washington to San Sebastian from $307

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 5/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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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.
Iberia Logo
3:17 pm - 8:40 am
SEA
-
EAS
32h 23m
2 stops
Iberia Logo
1:40 pm - 12:44 am
EAS
-
SEA
20h 04m
2 stops
$941Iberia
Thu, May 7 - Thu, May 14
Iberia Logo
6:00 am - 1:00 pm
SEA
-
EAS
22h 00m
2 stops
Iberia Logo
1:40 pm - 12:44 am
EAS
-
SEA
20h 04m
2 stops
$942Iberia
Mon, May 4 - Mon, May 11
British Airways Logo
8:20 pm - 4:10 pm
SEA
-
EAS
34h 50m
1 stop
British Airways Logo
1:15 pm - 11:35 am
EAS
-
SEA
31h 20m
1 stop
$1,067British Airways
Fri, Sep 18 - Mon, Sep 28
Iberia Logo
8:20 pm - 8:40 am
SEA
-
EAS
27h 20m
2 stops
Iberia Logo
9:30 pm - 12:15 am
EAS
-
SEA
35h 45m
2 stops
$1,101Iberia
Fri, Sep 18 - Mon, Sep 28
Multiple Airlines Logo
8:20 pm - 4:10 pm
SEA
-
EAS
34h 50m
1 stop
Multiple Airlines Logo
9:30 pm - 10:57 pm
EAS
-
SEA
34h 27m
2 stops
$1,151Multiple Airlines
Fri, Sep 18 - Mon, Sep 28
Iberia Logo
9:50 am - 8:50 pm
SEA
-
EAS
26h 00m
2 stops
Iberia Logo
9:30 pm - 8:37 pm
EAS
-
SEA
32h 07m
2 stops
$1,188Iberia
Fri, Sep 4 - Sat, Sep 12
Multiple Airlines Logo
7:40 am - 2:40 pm
SEA
-
EAS
22h 00m
2 stops
Multiple Airlines Logo
9:30 pm - 11:35 am
EAS
-
SEA
23h 05m
2 stops
$1,720Multiple Airlines
Thu, Aug 13 - Mon, Aug 24
Iberia Logo
1:30 pm - 8:50 pm
SEA
-
EAS
22h 20m
2 stops
Iberia Logo
5:55 pm - 11:35 am
EAS
-
SEA
26h 40m
2 stops
$2,030Iberia
Wed, Apr 29 - Sun, May 3
Multiple Airlines Logo
7:40 am - 2:40 pm
SEA
-
EAS
22h 00m
2 stops
Multiple Airlines Logo
6:00 pm - 11:35 am
EAS
-
SEA
26h 35m
1 stop
$2,120Multiple Airlines
Thu, Aug 13 - Mon, Aug 24
Iberia Logo
8:20 pm - 8:20 am
SEA
-
EAS
27h 00m
2 stops
Iberia Logo
9:30 pm - 12:54 am
EAS
-
SEA
36h 24m
2 stops
$2,297Iberia
Thu, Aug 13 - Sun, Aug 23

Iberia flights from State of Washington to San Sebastian

Our best Iberia deals on State of Washington to San Sebastian flight tickets
Iberia
May 7
SEA3:17 pmSeattle/Tacoma Intl
32h 23m
2 stops
EAS8:40 amSan Sebastián
May 14
EAS1:40 pmSan Sebastián
20h 04m
2 stops
SEA12:44 amSeattle/Tacoma Intl
$941
Iberia
May 4
SEA6:00 amSeattle/Tacoma Intl
22h 00m
2 stops
EAS1:00 pmSan Sebastián
May 11
EAS1:40 pmSan Sebastián
20h 04m
2 stops
SEA12:44 amSeattle/Tacoma Intl
$942
Iberia
Sep 18
SEA8:20 pmSeattle/Tacoma Intl
27h 20m
2 stops
EAS8:40 amSan Sebastián
Sep 28
EAS9:30 pmSan Sebastián
35h 45m
2 stops
SEA12:15 amSeattle/Tacoma Intl
$1,101

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 18
SEA8:20 pmSeattle/Tacoma Intl
34h 50m
1 stop
EAS4:10 pmSan Sebastián
Sep 28
EAS1:15 pmSan Sebastián
31h 20m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$1,067
British Airways
Aug 8
SEA1:30 pmSeattle/Tacoma Intl
17h 40m
1 stop
EAS4:10 pmSan Sebastián
Aug 16
EAS9:30 pmSan Sebastián
35h 20m
2 stops
SEA11:50 pmSeattle/Tacoma Intl
$1,319
British Airways
Aug 8
SEA1:30 pmSeattle/Tacoma Intl
17h 40m
1 stop
EAS4:10 pmSan Sebastián
Aug 16
EAS4:55 pmSan Sebastián
27h 40m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$1,453

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 March 25, 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

Thu 5/7

3:17 pm-8:40 am

2 stops32h 23m

San Sebastián

Thu 5/14

1:40 pm-12:44 am

2 stops20h 04m

$941
Quickest round-trip

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Mon 5/4

6:00 am-1:00 pm

2 stops22h 00m

San Sebastián

Mon 5/11

1:40 pm-12:44 am

2 stops20h 04m

$942

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 9/18

8:20 pm-4:10 pm

1 stop34h 50m

San Sebastián

Mon 9/28

1:15 pm-11:35 am

1 stop31h 20m

$1,067

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 9/18

8:20 pm-8:40 am

2 stops27h 20m

San Sebastián

Mon 9/28

9:30 pm-12:15 am

2 stops35h 45m

$1,101

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 9/18

8:20 pm-4:10 pm

1 stop34h 50m

San Sebastián

Mon 9/28

9:30 pm-10:57 pm

2 stops34h 27m

$1,151

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 9/4

9:50 am-8:50 pm

2 stops26h 00m

San Sebastián

Sat 9/12

9:30 pm-8:37 pm

2 stops32h 07m

$1,188

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Thu 8/13

7:40 am-2:40 pm

2 stops22h 00m

San Sebastián

Mon 8/24

9:30 pm-11:35 am

2 stops23h 05m

$1,720

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Wed 4/29

1:30 pm-8:50 pm

2 stops22h 20m

San Sebastián

Sun 5/3

5:55 pm-11:35 am

2 stops26h 40m

$2,030

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Thu 8/13

7:40 am-2:40 pm

2 stops22h 00m

San Sebastián

Mon 8/24

6:00 pm-11:35 am

1 stop26h 35m

$2,120

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Thu 8/13

8:20 pm-8:20 am

2 stops27h 00m

San Sebastián

Sun 8/23

9:30 pm-12:54 am

2 stops36h 24m

$2,297

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, United Airlines 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

34h 50m

Direct flights

None
The fastest flight from State of Washington to San Sebastian takes 34h 50m
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.
Search flight deals

  • 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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