Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Bilbao from $379

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 4/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

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 Bilbao

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:00 pm - 4:40 pmSEA-BIO
17h 40m1 stop
Multiple Airlines Logo
7:25 am - 7:16 pmBIO-SEA
20h 51m2 stops
$462Multiple Airlines
Find Deal
Thu, Jan 29 - Sun, Feb 8
Multiple Airlines Logo
8:10 am - 4:40 pmSEA-BIO
23h 30m2 stops
Multiple Airlines Logo
7:25 am - 7:16 pmBIO-SEA
20h 51m2 stops
$465Multiple Airlines
Find Deal
Thu, Jan 29 - Sun, Feb 8
KLM Logo
1:40 pm - 10:25 pmSEA-BIO
23h 45m1 stop
KLM Logo
5:20 pm - 11:40 amBIO-SEA
27h 20m1 stop
$472KLM
Find Deal
Thu, Jan 29 - Sun, Feb 8
Multiple Airlines Logo
8:10 am - 9:55 pmSEA-BIO
28h 45m2 stops
Multiple Airlines Logo
12:45 pm - 9:31 amBIO-SEA
29h 46m3 stops
$483Multiple Airlines
Find Deal
Thu, Jan 29 - Sun, Feb 8
United Airlines Logo
3:10 pm - 9:55 pmSEA-BIO
21h 45m1 stop
United Airlines Logo
12:50 pm - 10:16 pmBIO-SEA
42h 26m2 stops
$596United Airlines
Find Deal
Sun, Feb 15 - Sat, Feb 21
United Airlines Logo
5:05 am - 9:55 pmSEA-BIO
31h 50m2 stops
United Airlines Logo
12:50 pm - 10:16 pmBIO-SEA
42h 26m2 stops
$600United Airlines
Find Deal
Sun, Feb 15 - Sat, Feb 21
Lufthansa Logo
4:10 pm - 6:05 pmSEA-BIO
17h 55m1 stop
Lufthansa Logo
6:45 am - 1:10 pmBIO-SEA
14h 25m1 stop
$621Lufthansa
Find Deal
Sun, Mar 15 - Thu, Mar 26
Lufthansa Logo
4:10 pm - 6:05 pmSEA-BIO
17h 55m1 stop
Lufthansa Logo
6:45 am - 7:03 pmBIO-SEA
20h 18m2 stops
$631Lufthansa
Find Deal
Sun, Mar 15 - Thu, Mar 26
Lufthansa Logo
4:10 pm - 4:40 pmSEA-BIO
16h 30m2 stops
Lufthansa Logo
6:45 am - 1:10 pmBIO-SEA
14h 25m1 stop
$643Lufthansa
Find Deal
Sun, Mar 15 - Fri, Mar 27
Lufthansa Logo
4:10 pm - 4:40 pmSEA-BIO
16h 30m2 stops
Lufthansa Logo
6:45 am - 7:03 pmBIO-SEA
20h 18m2 stops
$653Lufthansa
Find Deal
Sun, Mar 15 - Thu, Mar 26

United Airlines flights from Seattle to Bilbao

Our best United Airlines deals on Seattle to Bilbao flight tickets
United Airlines
Feb 15
SEA3:10 pmSeattle/Tacoma Intl
21h 45m
1 stop
BIO9:55 pmBilbao
Feb 21
BIO12:50 pmBilbao
42h 26m
2 stops
SEA10:16 pmSeattle/Tacoma Intl
$596
Find similar
United Airlines
Feb 15
SEA5:05 amSeattle/Tacoma Intl
31h 50m
2 stops
BIO9:55 pmBilbao
Feb 21
BIO12:50 pmBilbao
42h 26m
2 stops
SEA10:16 pmSeattle/Tacoma Intl
$600
Find similar
United Airlines
Mar 15
SEA4:10 pmSeattle/Tacoma Intl
21h 45m
1 stop
BIO9:55 pmBilbao
Mar 26
BIO6:45 amBilbao
14h 25m
1 stop
SEA1:10 pmSeattle/Tacoma Intl
$670
Find similar

Lufthansa flights from Seattle to Bilbao

Our best Lufthansa deals on Seattle to Bilbao flight tickets
Lufthansa
Mar 15
SEA4:10 pmSeattle/Tacoma Intl
17h 55m
1 stop
BIO6:05 pmBilbao
Mar 26
BIO6:45 amBilbao
14h 25m
1 stop
SEA1:10 pmSeattle/Tacoma Intl
$621
Find similar
Lufthansa
Mar 15
SEA4:10 pmSeattle/Tacoma Intl
17h 55m
1 stop
BIO6:05 pmBilbao
Mar 26
BIO6:45 amBilbao
20h 18m
2 stops
SEA7:03 pmSeattle/Tacoma Intl
$631
Find similar
Lufthansa
Mar 15
SEA4:10 pmSeattle/Tacoma Intl
16h 30m
2 stops
BIO4:40 pmBilbao
Mar 27
BIO6:45 amBilbao
14h 25m
1 stop
SEA1:10 pmSeattle/Tacoma Intl
$643
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 November 17, 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

Thu 1/29

2:00 pm-4:40 pm

1 stop17h 40m

Bilbao

Sun 2/8

7:25 am-7:16 pm

2 stops20h 51m

$462

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 1/29

8:10 am-4:40 pm

2 stops23h 30m

Bilbao

Sun 2/8

7:25 am-7:16 pm

2 stops20h 51m

$465

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 1/29

1:40 pm-10:25 pm

1 stop23h 45m

Bilbao

Sun 2/8

5:20 pm-11:40 am

1 stop27h 20m

$472

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 1/29

8:10 am-9:55 pm

2 stops28h 45m

Bilbao

Sun 2/8

12:45 pm-9:31 am

3 stops29h 46m

$483

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 2/15

3:10 pm-9:55 pm

1 stop21h 45m

Bilbao

Sat 2/21

12:50 pm-10:16 pm

2 stops42h 26m

$596

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 2/15

5:05 am-9:55 pm

2 stops31h 50m

Bilbao

Sat 2/21

12:50 pm-10:16 pm

2 stops42h 26m

$600

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 3/15

4:10 pm-6:05 pm

1 stop17h 55m

Bilbao

Thu 3/26

6:45 am-1:10 pm

1 stop14h 25m

$621

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 3/15

4:10 pm-6:05 pm

1 stop17h 55m

Bilbao

Thu 3/26

6:45 am-7:03 pm

2 stops20h 18m

$631

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 3/15

4:10 pm-4:40 pm

2 stops16h 30m

Bilbao

Fri 3/27

6:45 am-1:10 pm

1 stop14h 25m

$643

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 3/15

4:10 pm-4:40 pm

2 stops16h 30m

Bilbao

Thu 3/26

6:45 am-7:03 pm

2 stops20h 18m

$653

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 October. Flight prices, which tend to average around $731, are often lower during this time because this is during the off-season. If you’re not able to fly to Bilbao in October, then February is your next best option. Flight prices from Seattle to Bilbao during February average around $788.

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

Direct flights

None
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 05m 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
LufthansaPriceFrom $514Free CancellationRating
6.8
7,576 reviews
Search Lufthansa flights
United AirlinesPriceFrom $596Free CancellationRating
7.4
9,014 reviews
Search United Airlines flights
KLMPriceFrom $701Free CancellationRating
7.7
1,411 reviews
Search KLM flights
DeltaPriceFrom $731Free CancellationRating
7.9
8,006 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.

An easier way to manage your Bilbao 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
Wed 12/17
Wed 12/24
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

San Sebastián Airport