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Cheap flights from Seattle to San Sebastian from $550

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 10/25. 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.
Multiple Airlines Logo
7:50 pm - 8:40 amSEA-EAS
28h 50m2 stops
Multiple Airlines Logo
9:30 pm - 11:18 pmEAS-SEA
34h 48m2 stops
$666Multiple Airlines
Find Deal
Sun, Oct 26 - Tue, Nov 11
Iberia Logo
10:34 am - 1:00 pmSEA-EAS
17h 26m2 stops
Iberia Logo
9:20 am - 11:38 pmEAS-SEA
23h 18m2 stops
$731Iberia
Find Deal
Fri, Dec 5 - Mon, Dec 8
Iberia Logo
11:44 am - 8:50 pmSEA-EAS
24h 06m2 stops
Iberia Logo
9:20 am - 11:18 pmEAS-SEA
22h 58m2 stops
$796Iberia
Find Deal
Fri, Oct 24 - Wed, Nov 12
American Airlines Logo
7:50 pm - 8:40 amSEA-EAS
28h 50m2 stops
American Airlines Logo
9:30 pm - 11:26 pmEAS-SEA
34h 56m2 stops
$828American Airlines
Find Deal
Sun, Oct 26 - Wed, Nov 12
Multiple Airlines Logo
12:38 am - 1:00 pmSEA-EAS
27h 22m2 stops
Multiple Airlines Logo
9:20 am - 9:13 pmEAS-SEA
20h 53m2 stops
$831Multiple Airlines
Find Deal
Thu, Dec 4 - Mon, Dec 8
American Airlines Logo
12:34 am - 1:00 pmSEA-EAS
28h 26m2 stops
American Airlines Logo
9:30 pm - 11:26 pmEAS-SEA
34h 56m2 stops
$835American Airlines
Find Deal
Sat, Oct 25 - Wed, Nov 12
Multiple Airlines Logo
12:34 am - 8:50 pmSEA-EAS
36h 16m2 stops
Multiple Airlines Logo
9:30 pm - 11:18 pmEAS-SEA
34h 48m2 stops
$846Multiple Airlines
Find Deal
Sat, Oct 25 - Tue, Nov 11
Iberia Logo
7:44 am - 8:50 pmSEA-EAS
29h 06m2 stops
Iberia Logo
9:20 am - 9:12 pmEAS-SEA
20h 52m2 stops
$863Iberia
Find Deal
Mon, Oct 27 - Thu, Nov 13
American Airlines Logo
12:34 am - 2:00 pmSEA-EAS
28h 26m2 stops
American Airlines Logo
9:30 pm - 11:26 pmEAS-SEA
34h 56m2 stops
$885American Airlines
Find Deal
Fri, Oct 24 - Wed, Nov 12
American Airlines Logo
11:59 pm - 8:40 amSEA-EAS
48h 41m2 stops
American Airlines Logo
9:30 pm - 9:53 pmEAS-SEA
32h 23m2 stops
$892American Airlines
Find Deal
Sun, Mar 15 - Mon, Mar 23

Iberia flights from Seattle to San Sebastian

Our best Iberia deals on Seattle to San Sebastian flight tickets
Iberia
Dec 5
SEA10:34 amSeattle/Tacoma Intl
17h 26m
2 stops
EAS1:00 pmSan Sebastián
Dec 8
EAS9:20 amSan Sebastián
23h 18m
2 stops
SEA11:38 pmSeattle/Tacoma Intl
$731
Find similar
Iberia
Oct 24
SEA11:44 amSeattle/Tacoma Intl
24h 06m
2 stops
EAS8:50 pmSan Sebastián
Nov 12
EAS9:20 amSan Sebastián
22h 58m
2 stops
SEA11:18 pmSeattle/Tacoma Intl
$796
Find similar
Iberia
Oct 27
SEA7:44 amSeattle/Tacoma Intl
29h 06m
2 stops
EAS8:50 pmSan Sebastián
Nov 13
EAS9:20 amSan Sebastián
20h 52m
2 stops
SEA9:12 pmSeattle/Tacoma Intl
$863
Find similar

American Airlines flights from Seattle to San Sebastian

Our best American Airlines deals on Seattle to San Sebastian flight tickets
American Airlines
Oct 26
SEA7:50 pmSeattle/Tacoma Intl
28h 50m
2 stops
EAS8:40 amSan Sebastián
Nov 12
EAS9:30 pmSan Sebastián
34h 56m
2 stops
SEA11:26 pmSeattle/Tacoma Intl
$828
Find similar
American Airlines
Oct 25
SEA12:34 amSeattle/Tacoma Intl
28h 26m
2 stops
EAS1:00 pmSan Sebastián
Nov 12
EAS9:30 pmSan Sebastián
34h 56m
2 stops
SEA11:26 pmSeattle/Tacoma Intl
$835
Find similar
American Airlines
Oct 24
SEA12:34 amSeattle/Tacoma Intl
28h 26m
2 stops
EAS2:00 pmSan Sebastián
Nov 12
EAS9:30 pmSan Sebastián
34h 56m
2 stops
SEA11:26 pmSeattle/Tacoma Intl
$885
Find similar

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 October 5, 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

Sun 10/26

7:50 pm-8:40 am

2 stops28h 50m

San Sebastián

Tue 11/11

9:30 pm-11:18 pm

2 stops34h 48m

$666

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 12/5

10:34 am-1:00 pm

2 stops17h 26m

San Sebastián

Mon 12/8

9:20 am-11:38 pm

2 stops23h 18m

$731

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 10/24

11:44 am-8:50 pm

2 stops24h 06m

San Sebastián

Wed 11/12

9:20 am-11:18 pm

2 stops22h 58m

$796

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sun 10/26

7:50 pm-8:40 am

2 stops28h 50m

San Sebastián

Wed 11/12

9:30 pm-11:26 pm

2 stops34h 56m

$828

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Thu 12/4

12:38 am-1:00 pm

2 stops27h 22m

San Sebastián

Mon 12/8

9:20 am-9:13 pm

2 stops20h 53m

$831

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sat 10/25

12:34 am-1:00 pm

2 stops28h 26m

San Sebastián

Wed 11/12

9:30 pm-11:26 pm

2 stops34h 56m

$835

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sat 10/25

12:34 am-8:50 pm

2 stops36h 16m

San Sebastián

Tue 11/11

9:30 pm-11:18 pm

2 stops34h 48m

$846

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Mon 10/27

7:44 am-8:50 pm

2 stops29h 06m

San Sebastián

Thu 11/13

9:20 am-9:12 pm

2 stops20h 52m

$863

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Fri 10/24

12:34 am-2:00 pm

2 stops28h 26m

San Sebastián

Wed 11/12

9:30 pm-11:26 pm

2 stops34h 56m

$885

SeattleSan Sebastian

SEA - EAS

SEAEAS

Seattle/Tacoma Intl

Sun 3/15

11:59 pm-8:40 am

2 stops48h 41m

San Sebastián

Mon 3/23

9:30 pm-9:53 pm

2 stops32h 23m

$892

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 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 is the cheapest airline that flies from Seattle/Tacoma Intl to San Sebastián?

Iberia is the most popular carrier 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 37% of people opting to fly with this airline when traveling to San Sebastian. Keep in mind that there are 5 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.
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 17h 26m, 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.

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