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Cheap flights from Washington to San Sebastian from $318

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 4/21. 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.
Iberia Logo
7:00 am - 1:00 pm
SEA
-
EAS
21h 00m
2 stops
Iberia Logo
9:30 pm - 8:31 pm
EAS
-
SEA
32h 01m
2 stops
$725Iberia
Thu, Apr 30 - Mon, May 25
Multiple Airlines Logo
1:35 pm - 1:15 pm
SEA
-
EAS
14h 40m
1 stop
Multiple Airlines Logo
9:30 pm - 11:43 pm
EAS
-
SEA
35h 13m
2 stops
$821Multiple Airlines
Thu, Apr 30 - Mon, May 25
Iberia Logo
6:44 am - 8:40 am
SEA
-
EAS
16h 56m
2 stops
Iberia Logo
9:20 am - 11:04 pm
EAS
-
SEA
22h 44m
2 stops
$833Iberia
Thu, Feb 26 - Thu, Mar 5
Iberia Logo
6:50 pm - 8:40 am
SEA
-
EAS
28h 50m
2 stops
Iberia Logo
9:20 am - 11:40 pm
EAS
-
SEA
22h 20m
2 stops
$862Iberia
Fri, Mar 6 - Fri, Mar 13
Iberia Logo
12:59 am - 8:40 am
SEA
-
EAS
22h 41m
3 stops
Iberia Logo
9:30 pm - 5:10 pm
EAS
-
SEA
28h 40m
2 stops
$913Iberia
Wed, Apr 29 - Mon, May 25
Iberia Logo
12:59 am - 8:40 am
SEA
-
EAS
22h 41m
3 stops
Iberia Logo
9:20 am - 12:24 am
EAS
-
SEA
24h 04m
2 stops
$993Iberia
Wed, Feb 25 - Thu, Mar 5
American Airlines Logo
10:57 pm - 8:40 am
SEA
-
EAS
49h 43m
2 stops
American Airlines Logo
9:30 pm - 7:20 pm
EAS
-
SEA
29h 50m
2 stops
$1,012American Airlines
Sat, Mar 14 - Sat, Mar 21
Iberia Logo
7:00 am - 1:00 pm
SEA
-
EAS
21h 00m
2 stops
Iberia Logo
9:20 am - 12:44 am
EAS
-
SEA
24h 24m
2 stops
$1,013Iberia
Thu, Apr 30 - Sun, May 10
Multiple Airlines Logo
7:00 pm - 8:20 am
SEA
-
EAS
28h 20m
3 stops
Multiple Airlines Logo
5:55 pm - 8:40 pm
EAS
-
SEA
35h 45m
3 stops
$1,081Multiple Airlines
Thu, Apr 30 - Mon, May 25
Iberia Logo
8:20 pm - 8:40 am
SEA
-
EAS
27h 20m
2 stops
Iberia Logo
9:20 am - 8:31 pm
EAS
-
SEA
20h 11m
2 stops
$1,144Iberia
Wed, Jul 8 - Thu, Jul 16

Iberia flights from State of Washington to San Sebastian

Our best Iberia deals on State of Washington to San Sebastian flight tickets
Iberia
Apr 30
SEA7:00 amSeattle/Tacoma Intl
21h 00m
2 stops
EAS1:00 pmSan Sebastián
May 25
EAS9:30 pmSan Sebastián
32h 01m
2 stops
SEA8:31 pmSeattle/Tacoma Intl
$725
Iberia
Mar 6
SEA6:50 pmSeattle/Tacoma Intl
28h 50m
2 stops
EAS8:40 amSan Sebastián
Mar 13
EAS9:20 amSan Sebastián
22h 20m
2 stops
SEA11:40 pmSeattle/Tacoma Intl
$862
Iberia
Apr 29
SEA12:59 amSeattle/Tacoma Intl
22h 41m
3 stops
EAS8:40 amSan Sebastián
May 25
EAS9:30 pmSan Sebastián
28h 40m
2 stops
SEA5:10 pmSeattle/Tacoma Intl
$913

American Airlines flights from State of Washington to San Sebastian

Our best American Airlines deals on State of Washington to San Sebastian flight tickets
American Airlines
Feb 26
SEA6:44 amSeattle/Tacoma Intl
16h 56m
2 stops
EAS8:40 amSan Sebastián
Mar 5
EAS9:20 amSan Sebastián
22h 44m
2 stops
SEA11:04 pmSeattle/Tacoma Intl
$833
American Airlines
Mar 14
SEA10:57 pmSeattle/Tacoma Intl
49h 43m
2 stops
EAS8:40 amSan Sebastián
Mar 21
EAS9:30 pmSan Sebastián
29h 50m
2 stops
SEA7:20 pmSeattle/Tacoma Intl
$1,012
American Airlines
Mar 13
SEA6:00 amSeattle/Tacoma Intl
30h 50m
2 stops
EAS8:50 pmSan Sebastián
Mar 17
EAS9:20 amSan Sebastián
21h 44m
2 stops
SEA11:04 pmSeattle/Tacoma Intl
$1,156

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 February 5, 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

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Thu 4/30

7:00 am-1:00 pm

2 stops21h 00m

San Sebastián

Mon 5/25

9:30 pm-8:31 pm

2 stops32h 01m

$725

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Thu 4/30

1:35 pm-1:15 pm

1 stop14h 40m

San Sebastián

Mon 5/25

9:30 pm-11:43 pm

2 stops35h 13m

$821

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Thu 2/26

6:44 am-8:40 am

2 stops16h 56m

San Sebastián

Thu 3/5

9:20 am-11:04 pm

2 stops22h 44m

$833

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 3/6

6:50 pm-8:40 am

2 stops28h 50m

San Sebastián

Fri 3/13

9:20 am-11:40 pm

2 stops22h 20m

$862

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Wed 4/29

12:59 am-8:40 am

3 stops22h 41m

San Sebastián

Mon 5/25

9:30 pm-5:10 pm

2 stops28h 40m

$913

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Wed 2/25

12:59 am-8:40 am

3 stops22h 41m

San Sebastián

Thu 3/5

9:20 am-12:24 am

2 stops24h 04m

$993

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sat 3/14

10:57 pm-8:40 am

2 stops49h 43m

San Sebastián

Sat 3/21

9:30 pm-7:20 pm

2 stops29h 50m

$1,012

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Thu 4/30

7:00 am-1:00 pm

2 stops21h 00m

San Sebastián

Sun 5/10

9:20 am-12:44 am

2 stops24h 24m

$1,013

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Thu 4/30

7:00 pm-8:20 am

3 stops28h 20m

San Sebastián

Mon 5/25

5:55 pm-8:40 pm

3 stops35h 45m

$1,081

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Wed 7/8

8:20 pm-8:40 am

2 stops27h 20m

San Sebastián

Thu 7/16

9:20 am-8:31 pm

2 stops20h 11m

$1,144

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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 43% 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

14h 40m

Direct flights

None
The fastest flight from State of Washington to San Sebastian takes 14h 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.
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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