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Cheap flights from Seattle to San Sebastian from $633

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to San Sebastian departing on 4/2. 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 Seattle to San Sebastian

Cheap round-trip flights

Enter your travel dates to find the best prices.
Iberia Logo
8:20 pm - 8:40 am
SEA
-
EAS
27h 20m
2 stops
Iberia Logo
9:20 am - 12:30 am
EAS
-
SEA
24h 10m
2 stops
$671Iberia
Sun, Apr 19 - Tue, Apr 28
British Airways Logo
1:35 pm - 4:10 pm
SEA
-
EAS
17h 35m
1 stop
British Airways Logo
1:15 pm - 11:35 am
EAS
-
SEA
31h 20m
1 stop
$767British Airways
Sat, Apr 18 - Mon, Apr 27
American Airlines Logo
10:29 pm - 8:40 am
SEA
-
EAS
25h 11m
2 stops
American Airlines Logo
9:20 am - 12:44 am
EAS
-
SEA
24h 24m
2 stops
$773American Airlines
Sat, Apr 18 - Wed, Apr 29
American Airlines Logo
10:29 pm - 8:40 am
SEA
-
EAS
25h 11m
2 stops
American Airlines Logo
9:20 am - 10:51 am
EAS
-
SEA
34h 31m
2 stops
$781American Airlines
Sat, Apr 18 - Tue, Apr 28
American Airlines Logo
7:00 am - 8:40 am
SEA
-
EAS
40h 40m
2 stops
American Airlines Logo
9:20 am - 12:30 am
EAS
-
SEA
24h 10m
2 stops
$783American Airlines
Wed, Apr 22 - Wed, Apr 29
American Airlines Logo
7:00 am - 8:40 am
SEA
-
EAS
40h 40m
2 stops
American Airlines Logo
9:20 am - 10:51 am
EAS
-
SEA
34h 31m
2 stops
$790American Airlines
Wed, Apr 22 - Tue, Apr 28
Iberia Logo
1:37 pm - 1:00 pm
SEA
-
EAS
38h 23m
2 stops
Iberia Logo
9:30 pm - 12:44 am
EAS
-
SEA
36h 14m
2 stops
$798Iberia
Tue, Mar 31 - Tue, Apr 7
British Airways Logo
1:35 pm - 2:40 pm
SEA
-
EAS
16h 05m
1 stop
British Airways Logo
1:15 pm - 11:35 am
EAS
-
SEA
31h 20m
1 stop
$814British Airways
Thu, Apr 16 - Mon, Apr 27
British Airways Logo
1:35 pm - 4:10 pm
SEA
-
EAS
17h 35m
1 stop
British Airways Logo
11:45 am - 11:35 am
EAS
-
SEA
32h 50m
1 stop
$817British Airways
Sat, Apr 18 - Fri, May 1
American Airlines Logo
11:55 pm - 1:00 pm
SEA
-
EAS
28h 05m
2 stops
American Airlines Logo
1:40 pm - 12:44 am
EAS
-
SEA
20h 04m
2 stops
$821American Airlines
Sun, Apr 19 - Fri, May 1

Iberia flights from Seattle to San Sebastian

Our best Iberia deals on Seattle to San Sebastian flight tickets
Iberia
Apr 19
SEA8:20 pmSeattle/Tacoma Intl
27h 20m
2 stops
EAS8:40 amSan Sebastián
Apr 28
EAS9:20 amSan Sebastián
24h 10m
2 stops
SEA12:30 amSeattle/Tacoma Intl
$671
Iberia
Mar 31
SEA1:37 pmSeattle/Tacoma Intl
38h 23m
2 stops
EAS1:00 pmSan Sebastián
Apr 7
EAS9:30 pmSan Sebastián
36h 14m
2 stops
SEA12:44 amSeattle/Tacoma Intl
$798
Iberia
Apr 20
SEA7:00 amSeattle/Tacoma Intl
21h 00m
2 stops
EAS1:00 pmSan Sebastián
Apr 27
EAS1:40 pmSan Sebastián
20h 04m
2 stops
SEA12:44 amSeattle/Tacoma Intl
$856

British Airways flights from Seattle to San Sebastian

Our best British Airways deals on Seattle to San Sebastian flight tickets
British Airways
Apr 18
SEA1:35 pmSeattle/Tacoma Intl
17h 35m
1 stop
EAS4:10 pmSan Sebastián
Apr 27
EAS1:15 pmSan Sebastián
31h 20m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$767
British Airways
Apr 16
SEA1:35 pmSeattle/Tacoma Intl
16h 05m
1 stop
EAS2:40 pmSan Sebastián
Apr 27
EAS1:15 pmSan Sebastián
31h 20m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$814
British Airways
Apr 18
SEA1:35 pmSeattle/Tacoma Intl
17h 35m
1 stop
EAS4:10 pmSan Sebastián
May 1
EAS11:45 amSan Sebastián
32h 50m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$817

momondo Fare Finder

 
Customize your flight search to find flights from Seattle 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 17, 2026.
Use the filters below to find and compare flights from Seattle to San Sebastian that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sun 4/19

8:20 pm-8:40 am

2 stops27h 20m

San Sebastián

Tue 4/28

9:20 am-12:30 am

2 stops24h 10m

$671

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sat 4/18

1:35 pm-4:10 pm

1 stop17h 35m

San Sebastián

Mon 4/27

1:15 pm-11:35 am

1 stop31h 20m

$767

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sat 4/18

10:29 pm-8:40 am

2 stops25h 11m

San Sebastián

Wed 4/29

9:20 am-12:44 am

2 stops24h 24m

$773

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sat 4/18

10:29 pm-8:40 am

2 stops25h 11m

San Sebastián

Tue 4/28

9:20 am-10:51 am

2 stops34h 31m

$781

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Wed 4/22

7:00 am-8:40 am

2 stops40h 40m

San Sebastián

Wed 4/29

9:20 am-12:30 am

2 stops24h 10m

$783

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Wed 4/22

7:00 am-8:40 am

2 stops40h 40m

San Sebastián

Tue 4/28

9:20 am-10:51 am

2 stops34h 31m

$790

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Tue 3/31

1:37 pm-1:00 pm

2 stops38h 23m

San Sebastián

Tue 4/7

9:30 pm-12:44 am

2 stops36h 14m

$798

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Thu 4/16

1:35 pm-2:40 pm

1 stop16h 05m

San Sebastián

Mon 4/27

1:15 pm-11:35 am

1 stop31h 20m

$814

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sat 4/18

1:35 pm-4:10 pm

1 stop17h 35m

San Sebastián

Fri 5/1

11:45 am-11:35 am

1 stop32h 50m

$817

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sun 4/19

11:55 pm-1:00 pm

2 stops28h 05m

San Sebastián

Fri 5/1

1:40 pm-12:44 am

2 stops20h 04m

$821

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to San Sebastian from

How to get the cheapest flight ticket from Seattle 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, KLM and Delta are the top three most popular airlines that fly to San Sebastian from Seattle according to our data. Lufthansa is the first choice among our users, with 45% 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.

When to book flights from Seattle to San Sebastian

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to San Sebastian according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to San Sebastian (SEA to EAS) flight deals and tips

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

Fastest flight time

21h 16m

Direct flights

None
The fastest flight from Seattle to San Sebastian takes 21h 16m
There are no direct flights from Seattle to San Sebastian. There are no popular flight routes from Seattle to San Sebastian.
Search flight deals

  • How far is Seattle/Tacoma Intl to San Sebastián by plane?

    Seattle/Tacoma Intl and San Sebastián are 5178.8 mi apart from one another. Flights usually cover this in 21h 16m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to San Sebastián Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to San Sebastián Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Seattle/Tacoma 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 Seattle/Tacoma Intl Airport 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 Seattle to San Sebastian?

It is quick and easy to find Seattle to San Sebastian flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Sebastian that suits you.

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

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

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

momondo provides multiple filters to help you find the best flight to San Sebastian from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of Seattle 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

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