Cheap flights from Seattle to Bilbao from $319
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 8/18. 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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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 February. Flight prices, which tend to average around $786, are often lower during this time because this is during the off-season. If you’re not able to fly to Bilbao in February, then October is your next best option. Flight prices from Seattle to Bilbao during October average around $789.
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 airline that flies from Seattle/Tacoma Intl to Bilbao?
Aer Lingus, Air France, and United Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Bilbao
What airlines fly to Bilbao?
KLM, Lufthansa and Delta are the top three most popular airlines that fly to Bilbao from Seattle according to our data. KLM is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Bilbao. Keep in mind that there are 5 different airlines that fly to Bilbao on a routine basis, so you have a few additional options to choose from.
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
How far is Seattle/Tacoma Intl to Bilbao by plane?
The distance between Seattle/Tacoma Intl and Bilbao is about 5152.4 mi. 12h 55m 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 June 2025, there are 5 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 KLM, making up 32% of the total bookings. Other popular airlines include Lufthansa with 25%, Delta with 22%, and Air France with 10%.
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 | ||
|---|---|---|---|---|---|
| PriceFrom $596 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $672 | Free Cancellation | Rating 6.7 7,139 reviews | |||
| PriceFrom $675 | Free Cancellation | Rating 7.5 1,463 reviews | |||
| PriceFrom $730 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom $765 | Free Cancellation | Rating 7.8 1,358 reviews |
Traveling to a place near Bilbao?
Book flights to Bilbao if you plan to visit one of these locationsWhy 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.