What is the cheapest airline that flies from Seattle/Tacoma Intl to Bilbao?

Lufthansa, Aer Lingus, and United Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Bilbao

Which layover airport has the shortest connection time from Seattle to Bilbao?

Paris (CDG) has the shortest average layover time for this route: 1h 21m.

What airlines fly to Bilbao?

Lufthansa, Delta and KLM are the top three most popular airlines that fly to Bilbao from Seattle according to our data. Lufthansa is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Bilbao. Keep in mind that there are 4 different airlines that fly to Bilbao on a routine basis, so you have a few additional options to choose from.

Which airport is the most popular layover for flights between Seattle and Bilbao?

Frankfurt am Main (FRA) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest travel time from Seattle to Bilbao?

Flights connecting via Paris (CDG) have the shortest average one-way travel time: 12h 55m.

Which layover airport offers the lowest fares from Seattle to Bilbao?

Flights via Frankfurt am Main (FRA) offer the lowest average round-trip price of $1,088.

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?

As of November 2025, there are 4 operators available to choose from 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.

$466 Cheap Flights from Seattle to Bilbao in 2025/26

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3:40 pm - 11:20 pmSEA-BIO

46h 40m2 stops

7:25 am - 1:20 pmBIO-SEA

14h 55m1 stop

$412Lufthansa

Find Deal

Thu, Dec 4 - Wed, Dec 17

3:10 pm - 6:05 pmSEA-BIO

17h 55m1 stop

6:45 am - 12:10 pmBIO-SEA

14h 25m1 stop

$466Lufthansa

Find Deal

Wed, Feb 18 - Sat, Feb 28

8:10 am - 4:40 pmSEA-BIO

23h 30m2 stops

6:45 am - 12:10 pmBIO-SEA

14h 25m1 stop

$469Multiple Airlines

Find Deal

Thu, Dec 4 - Thu, Dec 11

1:40 pm - 5:20 pmSEA-BIO

18h 40m1 stop

6:50 am - 11:50 amBIO-SEA

14h 00m1 stop

$470KLM

Find Deal

Thu, Dec 4 - Thu, Dec 11

8:10 am - 4:40 pmSEA-BIO

23h 30m2 stops

7:40 am - 10:16 pmBIO-SEA

23h 36m2 stops

$474Multiple Airlines

Find Deal

Thu, Dec 4 - Thu, Dec 11

1:40 pm - 11:30 amSEA-BIO

12h 50m1 stop

7:25 am - 1:25 pmBIO-SEA

15h 00m1 stop

$476KLM

Find Deal

Thu, Dec 4 - Wed, Dec 17

12:43 pm - 9:55 pmSEA-BIO

48h 12m3 stops

6:45 am - 10:43 pmBIO-SEA

24h 58m2 stops

$495United Airlines

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Wed, Feb 18 - Sat, Feb 28

8:10 am - 6:05 pmSEA-BIO

24h 55m2 stops

7:25 am - 10:16 pmBIO-SEA

23h 51m2 stops

$567Air Canada

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Thu, Dec 4 - Wed, Dec 17

5:50 am - 6:05 pmSEA-BIO

27h 15m2 stops

7:25 am - 10:16 pmBIO-SEA

23h 51m2 stops

$576Air Canada

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Sun, Nov 23 - Wed, Dec 3

11:00 am - 12:50 pmSEA-BIO

16h 50m2 stops

6:45 am - 1:10 pmBIO-SEA

14h 25m1 stop

$625United Airlines

Find Deal

Thu, Mar 5 - Thu, Mar 12

United Airlines flights from Seattle to Bilbao

Our best United Airlines deals on Seattle to Bilbao flight tickets

United Airlines

Feb 18

SEA12:43 pmSeattle/Tacoma Intl

48h 12m

3 stops

BIO9:55 pmBilbao

Feb 28

BIO6:45 amBilbao

24h 58m

2 stops

SEA10:43 pmSeattle/Tacoma Intl

$495

Find similar

United Airlines

Mar 5

SEA11:00 amSeattle/Tacoma Intl

16h 50m

2 stops

BIO12:50 pmBilbao

Mar 12

BIO6:45 amBilbao

14h 25m

1 stop

SEA1:10 pmSeattle/Tacoma Intl

$625

Find similar

United Airlines

Mar 5

SEA11:00 amSeattle/Tacoma Intl

16h 50m

2 stops

BIO12:50 pmBilbao

Mar 12

BIO6:45 amBilbao

21h 50m

2 stops

SEA8:35 pmSeattle/Tacoma Intl

$634

Find similar

Lufthansa flights from Seattle to Bilbao

Our best Lufthansa deals on Seattle to Bilbao flight tickets

Lufthansa

Dec 4

SEA3:40 pmSeattle/Tacoma Intl

46h 40m

2 stops

BIO11:20 pmBilbao

Dec 17

BIO7:25 amBilbao

14h 55m

1 stop

SEA1:20 pmSeattle/Tacoma Intl

$412

Find similar

Lufthansa

Feb 18

SEA3:10 pmSeattle/Tacoma Intl

17h 55m

1 stop

BIO6:05 pmBilbao

Feb 28

BIO6:45 amBilbao

14h 25m

1 stop

SEA12:10 pmSeattle/Tacoma Intl

$466

Find similar

Lufthansa

Feb 18

SEA10:55 amSeattle/Tacoma Intl

22h 10m

2 stops

BIO6:05 pmBilbao

Feb 28

BIO6:45 amBilbao

21h 18m

2 stops

SEA7:03 pmSeattle/Tacoma Intl

$480

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 12/4

3:40 pm-11:20 pm

2 stops46h 40m

Bilbao

Wed 12/17

7:25 am-1:20 pm

1 stop14h 55m

$412

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Wed 2/18

3:10 pm-6:05 pm

1 stop17h 55m

Bilbao

Sat 2/28

6:45 am-12:10 pm

1 stop14h 25m

$466

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 12/4

8:10 am-4:40 pm

2 stops23h 30m

Bilbao

Thu 12/11

6:45 am-12:10 pm

1 stop14h 25m

$469

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 12/4

1:40 pm-5:20 pm

1 stop18h 40m

Bilbao

Thu 12/11

6:50 am-11:50 am

1 stop14h 00m

$470

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 12/4

8:10 am-4:40 pm

2 stops23h 30m

Bilbao

Thu 12/11

7:40 am-10:16 pm

2 stops23h 36m

$474

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 12/4

1:40 pm-11:30 am

1 stop12h 50m

Bilbao

Wed 12/17

7:25 am-1:25 pm

1 stop15h 00m

$476

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Wed 2/18

12:43 pm-9:55 pm

3 stops48h 12m

Bilbao

Sat 2/28

6:45 am-10:43 pm

2 stops24h 58m

$495

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 12/4

8:10 am-6:05 pm

2 stops24h 55m

Bilbao

Wed 12/17

7:25 am-10:16 pm

2 stops23h 51m

$567

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 11/23

5:50 am-6:05 pm

2 stops27h 15m

Bilbao

Wed 12/3

7:25 am-10:16 pm

2 stops23h 51m

$576

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 3/5

11:00 am-12:50 pm

2 stops16h 50m

Bilbao

Thu 3/12

6:45 am-1:10 pm

1 stop14h 25m

$625

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Showing 1-10 of 17 resultsSorted by cheapest first

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

Prices

Airlines

Layovers

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. 12h 50m 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?
As of November 2025, there are 4 operators available to choose from 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?
Based on momondo bookings for flights between Seattle and Bilbao, the leading airline is Lufthansa, making up 40% of the total bookings. Other popular airlines include Delta with 24%, KLM with 22%, and United Airlines with 14%.

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
Lufthansa	PriceFrom $514	Free Cancellation	Rating 6.8 7,547 reviews	Search Lufthansa flights
United Airlines	PriceFrom $596	Free Cancellation	Rating 7.4 8,998 reviews	Search United Airlines flights
KLM	PriceFrom $701	Free Cancellation	Rating 7.7 1,405 reviews	Search KLM flights
Delta	PriceFrom $731	Free Cancellation	Rating 7.9 8,002 reviews	Search Delta flights

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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

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Cheap flights from Seattle to Bilbao from $412

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 12/4. 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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United Airlines flights from Seattle to Bilbao

Our best United Airlines deals on Seattle to Bilbao flight tickets

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Our best Lufthansa deals on Seattle to Bilbao flight tickets

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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?

What is the cheapest day to depart on your flight 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.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Bilbao?

Lufthansa, Aer Lingus, and United Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Bilbao

What airlines fly to Bilbao?

Which airport is the most popular layover for flights between Seattle and Bilbao?

Frankfurt am Main (FRA) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Seattle to Bilbao?

Flights via Frankfurt am Main (FRA) offer the lowest average round-trip price of $1,088.

Which layover airport has the shortest travel time from Seattle to Bilbao?

Flights connecting via Paris (CDG) have the shortest average one-way travel time: 12h 55m.

Which layover airport has the shortest connection time from Seattle to Bilbao?

Paris (CDG) has the shortest average layover time for this route: 1h 21m.

When to book flights from Seattle to Bilbao

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

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

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

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?

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

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

Traveling to a place near Bilbao?

Why use momondo?

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

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

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

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

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Spain

Airports servicing Basque Country