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Cheap flights from Seattle to San Sebastian from $590

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 12/22. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Iberia Logo
6:50 pm - 8:40 amSEA-EAS
28h 50m2 stops
Iberia Logo
9:30 pm - 9:50 pmEAS-SEA
33h 20m2 stops
$709Iberia
Find Deal
Wed, Jan 7 - Fri, Jan 16
Iberia Logo
2:35 pm - 8:50 pmSEA-EAS
22h 15m2 stops
Iberia Logo
9:30 pm - 10:59 pmEAS-SEA
34h 29m2 stops
$968Iberia
Find Deal
Fri, Mar 20 - Sun, Mar 29
Multiple Airlines Logo
2:35 pm - 8:50 pmSEA-EAS
22h 15m2 stops
Multiple Airlines Logo
9:30 pm - 5:55 pmEAS-SEA
28h 25m2 stops
$971Multiple Airlines
Find Deal
Fri, Mar 13 - Sat, Mar 21
American Airlines Logo
6:15 am - 8:40 amSEA-EAS
17h 25m2 stops
American Airlines Logo
9:20 am - 11:25 pmEAS-SEA
23h 05m2 stops
$982American Airlines
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Wed, Dec 3 - Sun, Dec 7
American Airlines Logo
12:41 am - 8:40 amSEA-EAS
46h 59m2 stops
American Airlines Logo
9:20 am - 10:25 pmEAS-SEA
22h 05m2 stops
$1,076American Airlines
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Tue, Dec 2 - Sun, Dec 7
American Airlines Logo
12:41 am - 1:00 pmSEA-EAS
27h 19m2 stops
American Airlines Logo
9:20 am - 11:25 pmEAS-SEA
23h 05m2 stops
$1,267American Airlines
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Tue, Dec 2 - Sun, Dec 7
Multiple Airlines Logo
5:50 am - 1:30 pmSEA-EAS
23h 40m3 stops
Multiple Airlines Logo
5:55 pm - 8:45 pmEAS-SEA
35h 50m3 stops
$1,313Multiple Airlines
Find Deal
Fri, Mar 20 - Sun, Mar 29
Multiple Airlines Logo
5:50 am - 1:30 pmSEA-EAS
22h 40m3 stops
Multiple Airlines Logo
2:05 pm - 12:10 pmEAS-SEA
31h 05m3 stops
$1,351Multiple Airlines
Find Deal
Wed, Jan 7 - Fri, Jan 16
American Airlines Logo
6:15 am - 8:40 amSEA-EAS
17h 25m2 stops
American Airlines Logo
9:30 pm - 4:55 pmEAS-SEA
28h 25m2 stops
$1,410American Airlines
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Wed, Dec 17 - Wed, Dec 24
Multiple Airlines Logo
5:50 am - 1:30 pmSEA-EAS
23h 40m3 stops
Multiple Airlines Logo
2:05 pm - 6:05 pmEAS-SEA
36h 00m3 stops
$1,499Multiple Airlines
Find Deal
Fri, Mar 13 - Sat, Mar 21

American Airlines flights from Seattle to San Sebastian

Our best American Airlines deals on Seattle to San Sebastian flight tickets
American Airlines
Dec 3
SEA6:15 amSeattle/Tacoma Intl
17h 25m
2 stops
EAS8:40 amSan Sebastián
Dec 7
EAS9:20 amSan Sebastián
23h 05m
2 stops
SEA11:25 pmSeattle/Tacoma Intl
$982
Find similar
American Airlines
Dec 2
SEA12:41 amSeattle/Tacoma Intl
46h 59m
2 stops
EAS8:40 amSan Sebastián
Dec 7
EAS9:20 amSan Sebastián
22h 05m
2 stops
SEA10:25 pmSeattle/Tacoma Intl
$1,076
Find similar
American Airlines
Dec 2
SEA12:41 amSeattle/Tacoma Intl
27h 19m
2 stops
EAS1:00 pmSan Sebastián
Dec 7
EAS9:20 amSan Sebastián
23h 05m
2 stops
SEA11:25 pmSeattle/Tacoma Intl
$1,190
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Iberia flights from Seattle to San Sebastian

Our best Iberia deals on Seattle to San Sebastian flight tickets
Iberia
Jan 7
SEA6:50 pmSeattle/Tacoma Intl
28h 50m
2 stops
EAS8:40 amSan Sebastián
Jan 16
EAS9:30 pmSan Sebastián
33h 20m
2 stops
SEA9:50 pmSeattle/Tacoma Intl
$709
Find similar
Iberia
Mar 20
SEA2:35 pmSeattle/Tacoma Intl
22h 15m
2 stops
EAS8:50 pmSan Sebastián
Mar 29
EAS9:30 pmSan Sebastián
34h 29m
2 stops
SEA10:59 pmSeattle/Tacoma Intl
$968
Find similar
Iberia
Dec 22
SEA8:30 amSeattle/Tacoma Intl
27h 20m
2 stops
EAS8:50 pmSan Sebastián
Dec 31
EAS9:30 pmSan Sebastián
22h 06m
2 stops
SEA10:36 amSeattle/Tacoma Intl
$2,219
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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 November 20, 2025.
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

Wed 1/7

6:50 pm-8:40 am

2 stops28h 50m

San Sebastián

Fri 1/16

9:30 pm-9:50 pm

2 stops33h 20m

$709

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 3/20

2:35 pm-8:50 pm

2 stops22h 15m

San Sebastián

Sun 3/29

9:30 pm-10:59 pm

2 stops34h 29m

$968

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 3/13

2:35 pm-8:50 pm

2 stops22h 15m

San Sebastián

Sat 3/21

9:30 pm-5:55 pm

2 stops28h 25m

$971

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Wed 12/3

6:15 am-8:40 am

2 stops17h 25m

San Sebastián

Sun 12/7

9:20 am-11:25 pm

2 stops23h 05m

$982

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Tue 12/2

12:41 am-8:40 am

2 stops46h 59m

San Sebastián

Sun 12/7

9:20 am-10:25 pm

2 stops22h 05m

$1,076

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Tue 12/2

12:41 am-1:00 pm

2 stops27h 19m

San Sebastián

Sun 12/7

9:20 am-11:25 pm

2 stops23h 05m

$1,267

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 3/20

5:50 am-1:30 pm

3 stops23h 40m

San Sebastián

Sun 3/29

5:55 pm-8:45 pm

3 stops35h 50m

$1,313

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Wed 1/7

5:50 am-1:30 pm

3 stops22h 40m

San Sebastián

Fri 1/16

2:05 pm-12:10 pm

3 stops31h 05m

$1,351

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Wed 12/17

6:15 am-8:40 am

2 stops17h 25m

San Sebastián

Wed 12/24

9:30 pm-4:55 pm

2 stops28h 25m

$1,410

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 3/13

5:50 am-1:30 pm

3 stops23h 40m

San Sebastián

Sat 3/21

2:05 pm-6:05 pm

3 stops36h 00m

$1,499

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 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, Delta and KLM 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 40% 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

Direct flights

None
There are no direct flights from Seattle to San Sebastian. There are no popular flight routes from Seattle to San Sebastian.
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  • 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 17h 25m, 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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