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Cheap flights from Seattle to Bilbao from $243

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 Bilbao departing on 4/26. 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 Bilbao

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
2:10 pm - 5:20 pm
SEA
-
BIO
18h 10m
1 stop
Delta Logo
6:50 am - 12:35 pm
BIO
-
SEA
13h 45m
1 stop
$473Delta
Sun, Mar 1 - Mon, Mar 16
Delta Logo
4:05 pm - 11:30 am
SEA
-
BIO
34h 25m
2 stops
Delta Logo
6:50 am - 12:35 pm
BIO
-
SEA
13h 45m
1 stop
$480Delta
Sun, Mar 1 - Mon, Mar 16
Multiple Airlines Logo
8:00 am - 6:05 pm
SEA
-
BIO
25h 05m
2 stops
Multiple Airlines Logo
5:35 pm - 1:10 pm
BIO
-
SEA
27h 35m
1 stop
$483Multiple Airlines
Sun, Mar 1 - Mon, Mar 16
Delta Logo
4:05 pm - 11:30 am
SEA
-
BIO
34h 25m
2 stops
Delta Logo
7:25 am - 10:45 am
BIO
-
SEA
35h 20m
2 stops
$485Delta
Sun, Mar 1 - Mon, Mar 16
American Airlines Logo
5:37 am - 8:30 am
SEA
-
BIO
17h 53m
2 stops
American Airlines Logo
9:15 am - 12:24 am
BIO
-
SEA
23h 09m
2 stops
$500American Airlines
Sun, Mar 1 - Mon, Mar 16
United Airlines Logo
3:10 pm - 11:20 pm
SEA
-
BIO
23h 10m
1 stop
United Airlines Logo
6:45 am - 9:01 pm
BIO
-
SEA
23h 16m
3 stops
$534United Airlines
Fri, Feb 27 - Tue, Mar 3
United Airlines Logo
3:10 pm - 11:20 pm
SEA
-
BIO
23h 10m
1 stop
United Airlines Logo
11:35 am - 1:20 pm
BIO
-
SEA
34h 45m
1 stop
$536United Airlines
Fri, Feb 27 - Tue, Mar 3
United Airlines Logo
11:14 pm - 5:00 pm
SEA
-
BIO
32h 46m
2 stops
United Airlines Logo
6:50 am - 12:20 pm
BIO
-
SEA
14h 30m
1 stop
$540United Airlines
Sat, May 2 - Fri, May 22
Lufthansa Logo
3:00 pm - 11:20 pm
SEA
-
BIO
24h 20m
1 stop
Lufthansa Logo
6:50 pm - 2:20 pm
BIO
-
SEA
27h 30m
1 stop
$598Lufthansa
Fri, Mar 13 - Thu, Mar 19
Multiple Airlines Logo
5:50 am - 5:55 pm
SEA
-
BIO
27h 05m
2 stops
Multiple Airlines Logo
5:50 pm - 12:20 pm
BIO
-
SEA
27h 30m
1 stop
$605Multiple Airlines
Fri, Apr 3 - Mon, Apr 13

Turkish Airlines flights from Seattle to Bilbao

Our best Turkish Airlines deals on Seattle to Bilbao flight tickets
Turkish Airlines
May 2
SEA7:10 pmSeattle/Tacoma Intl
31h 00m
1 stop
BIO11:10 amBilbao
May 22
BIO12:10 pmBilbao
38h 05m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$693
Turkish Airlines
Mar 15
SEA8:00 pmSeattle/Tacoma Intl
31h 00m
1 stop
BIO11:00 amBilbao
Mar 22
BIO5:10 pmBilbao
32h 55m
1 stop
SEA6:05 pmSeattle/Tacoma Intl
$713
Turkish Airlines
Jan 30
SEA7:00 pmSeattle/Tacoma Intl
36h 10m
1 stop
BIO4:10 pmBilbao
Feb 8
BIO5:10 pmBilbao
32h 55m
1 stop
SEA5:05 pmSeattle/Tacoma Intl
$852

Lufthansa flights from Seattle to Bilbao

Our best Lufthansa deals on Seattle to Bilbao flight tickets
Lufthansa
Mar 13
SEA3:00 pmSeattle/Tacoma Intl
24h 20m
1 stop
BIO11:20 pmBilbao
Mar 19
BIO6:50 pmBilbao
27h 30m
1 stop
SEA2:20 pmSeattle/Tacoma Intl
$598
Lufthansa
May 2
SEA2:23 pmSeattle/Tacoma Intl
37h 57m
2 stops
BIO1:20 pmBilbao
May 22
BIO6:50 amBilbao
19h 09m
2 stops
SEA4:59 pmSeattle/Tacoma Intl
$715
Lufthansa
Mar 15
SEA4:10 pmSeattle/Tacoma Intl
17h 55m
1 stop
BIO6:05 pmBilbao
Mar 22
BIO6:50 pmBilbao
50h 20m
2 stops
SEA1:10 pmSeattle/Tacoma Intl
$721

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Bilbao 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 January 29, 2026.
Use the filters below to find and compare flights from Seattle to Bilbao that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 3/1

2:10 pm-5:20 pm

1 stop18h 10m

Bilbao

Mon 3/16

6:50 am-12:35 pm

1 stop13h 45m

$473

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 3/1

4:05 pm-11:30 am

2 stops34h 25m

Bilbao

Mon 3/16

6:50 am-12:35 pm

1 stop13h 45m

$480

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 3/1

8:00 am-6:05 pm

2 stops25h 05m

Bilbao

Mon 3/16

5:35 pm-1:10 pm

1 stop27h 35m

$483

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 3/1

4:05 pm-11:30 am

2 stops34h 25m

Bilbao

Mon 3/16

7:25 am-10:45 am

2 stops35h 20m

$485

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 3/1

5:37 am-8:30 am

2 stops17h 53m

Bilbao

Mon 3/16

9:15 am-12:24 am

2 stops23h 09m

$500

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Fri 2/27

3:10 pm-11:20 pm

1 stop23h 10m

Bilbao

Tue 3/3

6:45 am-9:01 pm

3 stops23h 16m

$534

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Fri 2/27

3:10 pm-11:20 pm

1 stop23h 10m

Bilbao

Tue 3/3

11:35 am-1:20 pm

1 stop34h 45m

$536

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sat 5/2

11:14 pm-5:00 pm

2 stops32h 46m

Bilbao

Fri 5/22

6:50 am-12:20 pm

1 stop14h 30m

$540

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Fri 3/13

3:00 pm-11:20 pm

1 stop24h 20m

Bilbao

Thu 3/19

6:50 pm-2:20 pm

1 stop27h 30m

$598

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Fri 4/3

5:50 am-5:55 pm

2 stops27h 05m

Bilbao

Mon 4/13

5:50 pm-12:20 pm

1 stop27h 30m

$605

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 Bilbao from

How to get the cheapest flight ticket from Seattle to Bilbao

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 month to fly to Bilbao?

The cheapest month to fly to Bilbao from Seattle is in January. Flight prices, which tend to average around $484, are often lower during this time because this is during the off-season. If you’re not able to fly to Bilbao in January, then October is your next best option. Flight prices from Seattle to Bilbao during October average around $731.

When to book flights from Seattle to Bilbao

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

Cheap Seattle to Bilbao (SEA to BIO) flight deals and tips

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

Fastest flight time

18h 10m

Direct flights

None
The fastest flight from Seattle to Bilbao takes 18h 10m
There are no direct flights from Seattle to Bilbao. There are no popular flight routes from Seattle to Bilbao.
Search flight deals

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

    The distance between Seattle/Tacoma Intl and Bilbao is about 5152.4 mi. 18h 10m is a normal flight duration for this route.

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

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

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Bilbao Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Bilbao 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 Bilbao Airport.

  • What documentation or ID do you need to fly to Bilbao Airport?

    The travel and health documents required for your trip to Bilbao 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 Bilbao Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Seattle to Bilbao?

Best airlines flying from Seattle to Bilbao

Compare and see reviews for airlines that fly from Seattle to Bilbao with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $484Free CancellationRating
7.4
9,215 reviews
Search United Airlines flights
LufthansaPriceFrom $484Free CancellationRating
6.8
7,756 reviews
Search Lufthansa flights
KLMPriceFrom $586Free CancellationRating
7.7
1,443 reviews
Search KLM flights
DeltaPriceFrom $731Free CancellationRating
7.9
8,127 reviews
Search Delta flights

Traveling to a place near Bilbao?

Book flights to Bilbao if you plan to visit one of these locations
Getxo
Laredo
Lekeitio

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Bilbao?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Bilbao from Seattle.

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

Yes. momondo allows you to filter the results for Seattle to Bilbao flights to just show those with flexible booking policies.

How can momondo help me find flights from Seattle to Bilbao?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Bilbao from Seattle.

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

If you are not ready to book a flight from Seattle to Bilbao now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Bilbao and let you know when they change.

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