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Cheap flights from Seattle to Bilbao from $439

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Bilbao departing on 1/31. 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.
Lufthansa Logo
2:00 pm - 4:40 pm
SEA
-
BIO
17h 40m1 stop
Lufthansa Logo
11:35 am - 7:16 pm
BIO
-
SEA
40h 41m2 stops
$439Lufthansa
Sat, Jan 31 - Sat, Feb 7
Lufthansa Logo
2:00 pm - 4:40 pm
SEA
-
BIO
17h 40m1 stop
Lufthansa Logo
11:35 am - 1:20 pm
BIO
-
SEA
34h 45m1 stop
$454Lufthansa
Sat, Jan 31 - Sat, Feb 7
Lufthansa Logo
3:10 pm - 9:55 pm
SEA
-
BIO
21h 45m1 stop
Lufthansa Logo
7:25 am - 2:20 pm
BIO
-
SEA
14h 55m1 stop
$456Lufthansa
Wed, Mar 4 - Wed, Mar 11
Lufthansa Logo
2:10 pm - 9:55 pm
SEA
-
BIO
22h 45m2 stops
Lufthansa Logo
7:25 am - 7:16 pm
BIO
-
SEA
20h 51m2 stops
$460Lufthansa
Thu, Jan 29 - Sun, Feb 8
Delta Logo
2:10 pm - 5:20 pm
SEA
-
BIO
18h 10m1 stop
Delta Logo
6:50 am - 11:40 am
BIO
-
SEA
13h 50m1 stop
$471Delta
Fri, Jan 30 - Tue, Feb 10
United Airlines Logo
3:10 pm - 6:05 pm
SEA
-
BIO
17h 55m1 stop
United Airlines Logo
7:25 am - 1:20 pm
BIO
-
SEA
14h 55m1 stop
$474United Airlines
Sun, Feb 1 - Sun, Feb 8
Delta Logo
7:20 am - 11:30 am
SEA
-
BIO
19h 10m2 stops
Delta Logo
6:50 am - 11:40 am
BIO
-
SEA
13h 50m1 stop
$475Delta
Thu, Jan 29 - Fri, Feb 6
Delta Logo
1:40 pm - 5:20 pm
SEA
-
BIO
18h 40m1 stop
Delta Logo
7:25 am - 1:20 pm
BIO
-
SEA
14h 55m1 stop
$477Delta
Tue, Jan 27 - Mon, Feb 9
United Airlines Logo
5:00 am - 9:55 pm
SEA
-
BIO
31h 55m2 stops
United Airlines Logo
7:25 am - 1:20 pm
BIO
-
SEA
14h 55m1 stop
$479United Airlines
Tue, Jan 27 - Sun, Feb 8
United Airlines Logo
8:10 am - 4:10 pm
SEA
-
BIO
23h 00m2 stops
United Airlines Logo
7:25 am - 1:20 pm
BIO
-
SEA
14h 55m1 stop
$480United Airlines
Wed, Jan 28 - Sun, Feb 8

Lufthansa flights from Seattle to Bilbao

Our best Lufthansa deals on Seattle to Bilbao flight tickets
Lufthansa
Jan 31
SEA2:00 pmSeattle/Tacoma Intl
17h 40m
1 stop
BIO4:40 pmBilbao
Feb 7
BIO11:35 amBilbao
40h 41m
2 stops
SEA7:16 pmSeattle/Tacoma Intl
$439
Find similar
Lufthansa
Jan 31
SEA2:00 pmSeattle/Tacoma Intl
17h 40m
1 stop
BIO4:40 pmBilbao
Feb 7
BIO11:35 amBilbao
34h 45m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$454
Find similar
Lufthansa
Mar 4
SEA3:10 pmSeattle/Tacoma Intl
21h 45m
1 stop
BIO9:55 pmBilbao
Mar 11
BIO7:25 amBilbao
14h 55m
1 stop
SEA2:20 pmSeattle/Tacoma Intl
$456
Find similar

Delta flights from Seattle to Bilbao

Our best Delta deals on Seattle to Bilbao flight tickets
Delta
Jan 30
SEA2:10 pmSeattle/Tacoma Intl
18h 10m
1 stop
BIO5:20 pmBilbao
Feb 10
BIO6:50 amBilbao
13h 50m
1 stop
SEA11:40 amSeattle/Tacoma Intl
$471
Find similar
Delta
Jan 28
SEA7:10 amSeattle/Tacoma Intl
25h 10m
2 stops
BIO5:20 pmBilbao
Feb 6
BIO6:50 amBilbao
13h 50m
1 stop
SEA11:40 amSeattle/Tacoma Intl
$475
Find similar
Delta
Jan 27
SEA1:40 pmSeattle/Tacoma Intl
18h 40m
1 stop
BIO5:20 pmBilbao
Feb 9
BIO7:25 amBilbao
14h 55m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$477
Find similar

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 December 18, 2025.
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

Sat 1/31

2:00 pm-4:40 pm

1 stop17h 40m

Bilbao

Sat 2/7

11:35 am-7:16 pm

2 stops40h 41m

$439

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sat 1/31

2:00 pm-4:40 pm

1 stop17h 40m

Bilbao

Sat 2/7

11:35 am-1:20 pm

1 stop34h 45m

$454

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Wed 3/4

3:10 pm-9:55 pm

1 stop21h 45m

Bilbao

Wed 3/11

7:25 am-2:20 pm

1 stop14h 55m

$456

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 1/29

2:10 pm-9:55 pm

2 stops22h 45m

Bilbao

Sun 2/8

7:25 am-7:16 pm

2 stops20h 51m

$460

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Fri 1/30

2:10 pm-5:20 pm

1 stop18h 10m

Bilbao

Tue 2/10

6:50 am-11:40 am

1 stop13h 50m

$471

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 2/1

3:10 pm-6:05 pm

1 stop17h 55m

Bilbao

Sun 2/8

7:25 am-1:20 pm

1 stop14h 55m

$474

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 1/29

7:20 am-11:30 am

2 stops19h 10m

Bilbao

Fri 2/6

6:50 am-11:40 am

1 stop13h 50m

$475

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Tue 1/27

1:40 pm-5:20 pm

1 stop18h 40m

Bilbao

Mon 2/9

7:25 am-1:20 pm

1 stop14h 55m

$477

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Tue 1/27

5:00 am-9:55 pm

2 stops31h 55m

Bilbao

Sun 2/8

7:25 am-1:20 pm

1 stop14h 55m

$479

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Wed 1/28

8:10 am-4:10 pm

2 stops23h 00m

Bilbao

Sun 2/8

7:25 am-1:20 pm

1 stop14h 55m

$480

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 $533, 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.

What is the cheapest day to depart on your flight to Bilbao?

The cheapest day to depart from Seattle to Bilbao is on a Monday. Travelers who choose to depart for Bilbao on a Monday will often find tickets for as low as $872. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $1,448. These prices are subject to change though, so be sure to set up a Price Alert for flights to Bilbao.

What is the cheapest time of day to depart on your flight to Bilbao?

Our most recent data shows that the best time of day to fly to Bilbao is in the morning. Flights from Seattle to Bilbao during this time can be as low as $715. At noon is when there is more demand to fly to Bilbao, so prices are often more expensive at around $1,245 per ticket.

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

16h 30m

Direct flights

None
The fastest flight from Seattle to Bilbao takes 16h 30m
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. 16h 30m 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
9,091 reviews
Search United Airlines flights
LufthansaPriceFrom $484Free CancellationRating
6.8
7,634 reviews
Search Lufthansa flights
KLMPriceFrom $586Free CancellationRating
7.7
1,430 reviews
Search KLM flights
DeltaPriceFrom $731Free CancellationRating
7.9
8,007 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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