Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Seattle to San Sebastian from $400

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 10/5. 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

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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
8:55 am - 11:35 am
EAS
-
SEA
35h 40m
2 stops
$848Iberia
Mon, Oct 5 - Mon, Oct 12
British Airways Logo
3:10 pm - 8:50 pm
SEA
-
EAS
20h 40m
2 stops
British Airways Logo
1:15 pm - 11:35 am
EAS
-
SEA
31h 20m
1 stop
$930British Airways
Mon, Oct 5 - Mon, Oct 12
Iberia Logo
8:20 pm - 8:20 am
SEA
-
EAS
27h 00m
2 stops
Iberia Logo
9:30 pm - 6:25 pm
EAS
-
SEA
29h 55m
2 stops
$1,010Iberia
Wed, Sep 30 - Sat, Oct 10
British Airways Logo
8:20 am - 1:00 pm
SEA
-
EAS
19h 40m
2 stops
British Airways Logo
9:30 pm - 12:15 am
EAS
-
SEA
35h 45m
2 stops
$1,120British Airways
Fri, Oct 16 - Tue, Oct 20
British Airways Logo
8:20 am - 1:00 pm
SEA
-
EAS
19h 40m
2 stops
British Airways Logo
1:40 pm - 12:14 am
EAS
-
SEA
43h 34m
2 stops
$1,121British Airways
Fri, Oct 16 - Tue, Oct 20
British Airways Logo
8:20 pm - 4:55 pm
SEA
-
EAS
35h 35m
2 stops
British Airways Logo
9:30 pm - 8:37 pm
EAS
-
SEA
32h 07m
2 stops
$1,244British Airways
Sun, Jul 12 - Thu, Jul 23
American Airlines Logo
9:35 pm - 8:40 am
SEA
-
EAS
26h 05m
2 stops
American Airlines Logo
9:20 am - 10:56 pm
EAS
-
SEA
22h 36m
2 stops
$1,271American Airlines
Sat, Jul 11 - Tue, Jul 21
Iberia Logo
5:05 am - 8:50 pm
SEA
-
EAS
30h 45m
2 stops
Iberia Logo
9:30 pm - 6:25 pm
EAS
-
SEA
29h 55m
2 stops
$1,283Iberia
Thu, Jul 9 - Thu, Jul 16
Iberia Logo
7:26 am - 8:50 pm
SEA
-
EAS
28h 24m
2 stops
Iberia Logo
9:30 pm - 5:10 pm
EAS
-
SEA
28h 40m
2 stops
$1,302Iberia
Mon, Jul 13 - Mon, Jul 20
Iberia Logo
5:05 am - 1:00 pm
SEA
-
EAS
22h 55m
2 stops
Iberia Logo
5:55 pm - 5:10 pm
EAS
-
SEA
32h 15m
2 stops
$1,309Iberia
Mon, Jul 13 - Wed, Jul 22

Iberia flights from Seattle to San Sebastian

Our best Iberia deals on Seattle to San Sebastian flight tickets
Iberia
Oct 5
SEA8:20 pmSeattle/Tacoma Intl
27h 20m
2 stops
EAS8:40 amSan Sebastián
Oct 12
EAS8:55 amSan Sebastián
35h 40m
2 stops
SEA11:35 amSeattle/Tacoma Intl
$848
Iberia
Sep 30
SEA8:20 pmSeattle/Tacoma Intl
27h 00m
2 stops
EAS8:20 amSan Sebastián
Oct 10
EAS9:30 pmSan Sebastián
29h 55m
2 stops
SEA6:25 pmSeattle/Tacoma Intl
$1,010
Iberia
Jul 9
SEA5:05 amSeattle/Tacoma Intl
30h 45m
2 stops
EAS8:50 pmSan Sebastián
Jul 16
EAS9:30 pmSan Sebastián
29h 55m
2 stops
SEA6:25 pmSeattle/Tacoma Intl
$1,283

British Airways flights from Seattle to San Sebastian

Our best British Airways deals on Seattle to San Sebastian flight tickets
British Airways
Oct 5
SEA3:10 pmSeattle/Tacoma Intl
20h 40m
2 stops
EAS8:50 pmSan Sebastián
Oct 12
EAS1:15 pmSan Sebastián
31h 20m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$930
British Airways
Oct 16
SEA8:20 amSeattle/Tacoma Intl
19h 40m
2 stops
EAS1:00 pmSan Sebastián
Oct 20
EAS9:30 pmSan Sebastián
35h 45m
2 stops
SEA12:15 amSeattle/Tacoma Intl
$1,120
British Airways
Oct 16
SEA8:20 amSeattle/Tacoma Intl
19h 40m
2 stops
EAS1:00 pmSan Sebastián
Oct 20
EAS1:40 pmSan Sebastián
43h 34m
2 stops
SEA12:14 amSeattle/Tacoma Intl
$1,121

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 May 27, 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

Mon 10/5

8:20 pm-8:40 am

2 stops27h 20m

San Sebastián

Mon 10/12

8:55 am-11:35 am

2 stops35h 40m

$848

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Mon 10/5

3:10 pm-8:50 pm

2 stops20h 40m

San Sebastián

Mon 10/12

1:15 pm-11:35 am

1 stop31h 20m

$930

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Wed 9/30

8:20 pm-8:20 am

2 stops27h 00m

San Sebastián

Sat 10/10

9:30 pm-6:25 pm

2 stops29h 55m

$1,010

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 10/16

8:20 am-1:00 pm

2 stops19h 40m

San Sebastián

Tue 10/20

9:30 pm-12:15 am

2 stops35h 45m

$1,120

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 10/16

8:20 am-1:00 pm

2 stops19h 40m

San Sebastián

Tue 10/20

1:40 pm-12:14 am

2 stops43h 34m

$1,121

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sun 7/12

8:20 pm-4:55 pm

2 stops35h 35m

San Sebastián

Thu 7/23

9:30 pm-8:37 pm

2 stops32h 07m

$1,244
Quickest round-trip

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sat 7/11

9:35 pm-8:40 am

2 stops26h 05m

San Sebastián

Tue 7/21

9:20 am-10:56 pm

2 stops22h 36m

$1,271

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Thu 7/9

5:05 am-8:50 pm

2 stops30h 45m

San Sebastián

Thu 7/16

9:30 pm-6:25 pm

2 stops29h 55m

$1,283

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Mon 7/13

7:26 am-8:50 pm

2 stops28h 24m

San Sebastián

Mon 7/20

9:30 pm-5:10 pm

2 stops28h 40m

$1,302

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Mon 7/13

5:05 am-1:00 pm

2 stops22h 55m

San Sebastián

Wed 7/22

5:55 pm-5:10 pm

2 stops32h 15m

$1,309

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

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 is the cheapest airline that flies from Seattle/Tacoma Intl to San Sebastián?

Iberia and British Airways are the most popular carriers operating from Seattle/Tacoma Intl to San Sebastián

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 55% 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

19h 40m

Direct flights

None
The fastest flight from Seattle to San Sebastian takes 19h 40m
There are no direct flights from Seattle to San Sebastian. There are no popular flight routes from Seattle to San Sebastian.
Search flight deals

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 19h 40m, 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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Fri 6/26
Fri 7/3
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Spain

Airports servicing Basque Country

Bilbao Airport