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Cheap flights from Seattle to San Sebastian from $420

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 5/26. 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
0 bags

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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.
British Airways Logo
8:20 pm - 4:10 pm
SEA
-
EAS
34h 50m
1 stop
British Airways Logo
9:30 pm - 11:35 am
EAS
-
SEA
23h 05m
2 stops
$1,158British Airways
Fri, Sep 18 - Sat, Sep 26
British Airways Logo
1:24 pm - 8:50 pm
SEA
-
EAS
22h 26m
2 stops
British Airways Logo
9:30 pm - 6:25 pm
EAS
-
SEA
29h 55m
2 stops
$1,159British Airways
Fri, Sep 18 - Sat, Sep 26
British Airways Logo
3:16 pm - 8:50 pm
SEA
-
EAS
44h 34m
2 stops
British Airways Logo
9:30 pm - 8:37 pm
EAS
-
SEA
32h 07m
2 stops
$1,191British Airways
Sat, Jul 4 - Mon, Jul 13
Multiple Airlines Logo
7:55 am - 8:40 am
SEA
-
EAS
39h 45m
2 stops
Multiple Airlines Logo
9:30 pm - 5:10 pm
EAS
-
SEA
28h 40m
2 stops
$1,216Multiple Airlines
Tue, May 19 - Tue, May 26
Iberia Logo
3:06 pm - 8:50 pm
SEA
-
EAS
20h 44m
2 stops
Iberia Logo
9:30 pm - 11:35 pm
EAS
-
SEA
35h 05m
2 stops
$1,223Iberia
Fri, Jul 3 - Mon, Jul 13
Multiple Airlines Logo
3:40 pm - 8:20 am
SEA
-
EAS
31h 40m
3 stops
Multiple Airlines Logo
5:55 pm - 8:40 pm
EAS
-
SEA
35h 45m
3 stops
$1,608Multiple Airlines
Sat, Jul 4 - Mon, Jul 13
Multiple Airlines Logo
7:10 pm - 8:20 am
SEA
-
EAS
28h 10m
3 stops
Multiple Airlines Logo
5:55 pm - 8:40 pm
EAS
-
SEA
35h 45m
3 stops
$1,647Multiple Airlines
Fri, Jul 3 - Mon, Jul 13
Multiple Airlines Logo
10:30 am - 5:20 pm
SEA
-
EAS
21h 50m
2 stops
Multiple Airlines Logo
5:55 pm - 8:40 pm
EAS
-
SEA
35h 45m
3 stops
$1,746Multiple Airlines
Sat, Jul 4 - Mon, Jul 13
Multiple Airlines Logo
7:00 pm - 8:20 am
SEA
-
EAS
28h 20m
2 stops
Multiple Airlines Logo
5:55 pm - 8:40 pm
EAS
-
SEA
35h 45m
3 stops
$1,901Multiple Airlines
Fri, Jul 3 - Mon, Jul 13
Cathay Pacific Logo
8:35 am - 1:00 pm
SEA
-
EAS
43h 25m
3 stops
Cathay Pacific Logo
9:30 pm - 10:05 am
EAS
-
SEA
45h 35m
2 stops
$12,560Cathay Pacific
Fri, Sep 18 - Sat, Sep 26

British Airways flights from Seattle to San Sebastian

Our best British Airways deals on Seattle to San Sebastian flight tickets
British Airways
Sep 18
SEA8:20 pmSeattle/Tacoma Intl
34h 50m
1 stop
EAS4:10 pmSan Sebastián
Sep 26
EAS9:30 pmSan Sebastián
23h 05m
2 stops
SEA11:35 amSeattle/Tacoma Intl
$1,158
British Airways
Sep 18
SEA1:24 pmSeattle/Tacoma Intl
22h 26m
2 stops
EAS8:50 pmSan Sebastián
Sep 26
EAS9:30 pmSan Sebastián
29h 55m
2 stops
SEA6:25 pmSeattle/Tacoma Intl
$1,159
British Airways
Jul 4
SEA3:16 pmSeattle/Tacoma Intl
44h 34m
2 stops
EAS8:50 pmSan Sebastián
Jul 13
EAS9:30 pmSan Sebastián
32h 07m
2 stops
SEA8:37 pmSeattle/Tacoma Intl
$1,191

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 April 9, 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

Cheapest round-trip

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 9/18

8:20 pm-4:10 pm

1 stop34h 50m

San Sebastián

Sat 9/26

9:30 pm-11:35 am

2 stops23h 05m

$1,158
Quickest round-trip

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 9/18

1:24 pm-8:50 pm

2 stops22h 26m

San Sebastián

Sat 9/26

9:30 pm-6:25 pm

2 stops29h 55m

$1,159

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sat 7/4

3:16 pm-8:50 pm

2 stops44h 34m

San Sebastián

Mon 7/13

9:30 pm-8:37 pm

2 stops32h 07m

$1,191

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Tue 5/19

7:55 am-8:40 am

2 stops39h 45m

San Sebastián

Tue 5/26

9:30 pm-5:10 pm

2 stops28h 40m

$1,216

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 7/3

3:06 pm-8:50 pm

2 stops20h 44m

San Sebastián

Mon 7/13

9:30 pm-11:35 pm

2 stops35h 05m

$1,223

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sat 7/4

3:40 pm-8:20 am

3 stops31h 40m

San Sebastián

Mon 7/13

5:55 pm-8:40 pm

3 stops35h 45m

$1,608

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 7/3

7:10 pm-8:20 am

3 stops28h 10m

San Sebastián

Mon 7/13

5:55 pm-8:40 pm

3 stops35h 45m

$1,647

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sat 7/4

10:30 am-5:20 pm

2 stops21h 50m

San Sebastián

Mon 7/13

5:55 pm-8:40 pm

3 stops35h 45m

$1,746

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 7/3

7:00 pm-8:20 am

2 stops28h 20m

San Sebastián

Mon 7/13

5:55 pm-8:40 pm

3 stops35h 45m

$1,901

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 9/18

8:35 am-1:00 pm

3 stops43h 25m

San Sebastián

Sat 9/26

9:30 pm-10:05 am

2 stops45h 35m

$12,560

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, United Airlines 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 50% 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

44h 34m

Direct flights

None
The fastest flight from Seattle to San Sebastian takes 44h 34m
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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Frequently asked questions about flying from Seattle to San Sebastian

  • 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 44h 34m, 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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