$770+ Cheap flights from Seattle (SEA) to Bilbao (BIO)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BIO
Sep 30 — Oct 71
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Bilbao with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Seattle to Bilbao
Cheapest
Best
Last-minute
Cheapest flights from Seattle to BilbaoExplore the most affordable flight options available from Seattle to Bilbao. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 31, 2026.
Explore the most affordable flight options available from Seattle to Bilbao. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 31, 2026.
This Gotogate deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/125:50 am -
2 stops27h 05m
Tue 10/206:50 am -
1 stop14h 30m
Deal found 8/27![Multiple Airlines logo]()
$770
This Cheapflightsfares deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/276:50 pm -
1 stop14h 05m
Thu 10/86:50 am -
2 stops20h 42m
Deal found 8/26![Lufthansa logo]()
$774
This Gotogate deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/46:50 pm -
1 stop14h 05m
Mon 10/196:40 pm -
1 stop31h 19m
Deal found 8/31![Lufthansa logo]()
$775
This Gotogate deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/276:50 pm -
1 stop19h 35m
Mon 10/126:40 pm -
1 stop31h 19m
Deal found 8/30![Lufthansa logo]()
$779
This Delta deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/49:59 am -
2 stops22h 31m
Mon 10/1912:00 pm -
1 stop32h 52m
Deal found 8/31![Delta logo]()
$783
This Justfly.com deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/123:00 pm -
2 stops41h 10m
Tue 10/206:50 am -
2 stops24h 57m
Deal found 8/27![Lufthansa logo]()
$787
This United deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2711:14 pm -
2 stops31h 46m
Mon 10/126:40 pm -
1 stop31h 19m
Deal found 8/30![Multiple Airlines logo]()
$797
This Delta deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/272:30 pm -
2 stops18h 00m
Thu 10/86:45 am -
2 stops19h 00m
Deal found 8/26![Delta logo]()
$802
This Gotogate deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/125:50 am -
2 stops27h 05m
Mon 10/196:40 pm -
2 stops26h 40m
Deal found 8/28![Multiple Airlines logo]()
$806
This United Airlines deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/247:00 am -
2 stops29h 55m
Wed 12/307:30 am -
1 stop14h 30m
Deal found 8/26![United Airlines logo]()
$815
Best flights from Seattle to BilbaoDiscover carefully curated flight deals from Seattle to Bilbao that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 31, 2026.
Discover carefully curated flight deals from Seattle to Bilbao that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 31, 2026.
This United deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2711:14 pm -
2 stops31h 46m
Mon 10/126:40 pm -
1 stop31h 19m
Deal found 8/30![Multiple Airlines logo]()
$797
This United Airlines deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/241:50 pm -
1 stop18h 10m
Mon 12/2812:25 pm -
2 stops41h 34m
Deal found 8/26![United Airlines logo]()
$850
This Cheapflightsfares deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/226:50 pm -
1 stop14h 05m
Tue 10/66:50 am -
2 stops16h 32m
Deal found 8/29![Lufthansa logo]()
$870
This Priceline deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/153:00 pm -
2 stops17h 55m
Sun 11/17:30 am -
2 stops23h 27m
Deal found 8/29![Air Canada logo]()
$930
This United deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/411:14 pm -
2 stops31h 46m
Mon 10/196:50 am -
2 stops24h 57m
Deal found 8/31![Multiple Airlines logo]()
$835
This United Airlines deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:00 am -
2 stops20h 45m
Tue 10/66:50 am -
2 stops16h 32m
Deal found 8/30![United Airlines logo]()
$892
This Cheapflightsfares deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:50 pm -
1 stop14h 05m
Thu 9/176:50 am -
1 stop14h 05m
Deal found 8/26![Lufthansa logo]()
$966
Last-minute flights from Seattle to BilbaoDiscover last-minute flight deals from Seattle to Bilbao. Data last updated August 31, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Bilbao. Data last updated August 31, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/226:50 pm -
1 stop14h 05m
Tue 10/66:50 am -
2 stops16h 32m
Deal found 8/30![Lufthansa logo]()
$870
This United Airlines deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:00 am -
2 stops20h 45m
Tue 10/66:50 am -
2 stops16h 32m
Deal found 8/30![United Airlines logo]()
$892
This Lufthansa deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals ”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/246:50 pm -
1 stop19h 35m
Sat 10/36:50 am -
1 stop14h 30m
Deal found 8/27![Lufthansa logo]()
$865
This United Airlines deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2410:48 pm -
2 stops27h 27m
Sat 10/36:50 am -
1 stop14h 30m
Deal found 8/27![United Airlines logo]()
$894
This Cheapflightsfares deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/276:50 pm -
1 stop14h 05m
Thu 10/86:50 am -
2 stops20h 42m
Deal found 8/26![Lufthansa logo]()
$774
This Gotogate deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/276:50 pm -
1 stop19h 35m
Mon 10/126:40 pm -
1 stop31h 19m
Deal found 8/30![Lufthansa logo]()
$779
This United deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2711:14 pm -
2 stops31h 46m
Mon 10/126:40 pm -
1 stop31h 19m
Deal found 8/30![Multiple Airlines logo]()
$797
This Delta deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/272:30 pm -
2 stops18h 00m
Thu 10/86:45 am -
2 stops19h 00m
Deal found 8/26![Delta logo]()
$802
Find flight deals from Seattle to Bilbao
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Bilbao (BIO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 31, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $770 (Gotogate) |
Popular in | July |
Cheapest in | January |
Average price | $1,048 |
Cheapflights 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, Cheapflights users made 7,457,451 searches. Data last updated August 31, 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
Cheapest round-trip
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Sun 9/27
11:14 pm-4:00 pm
2 stops31h 46m
Bilbao
Mon 10/12
6:40 pm-4:59 pm
1 stop31h 19m
$797
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Sun 10/4
11:14 pm-4:00 pm
2 stops31h 46m
Bilbao
Mon 10/19
6:50 am-10:47 pm
2 stops24h 57m
$835
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Thu 12/24
1:50 pm-5:00 pm
1 stop18h 10m
Bilbao
Mon 12/28
12:25 pm-8:59 pm
2 stops41h 34m
$850
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Tue 9/22
6:50 pm-5:55 pm
1 stop14h 05m
Bilbao
Tue 10/6
6:50 am-2:22 pm
2 stops16h 32m
$870
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Tue 9/22
5:00 am-10:45 am
2 stops20h 45m
Bilbao
Tue 10/6
6:50 am-2:22 pm
2 stops16h 32m
$892
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Thu 10/15
3:00 pm-5:55 pm
2 stops17h 55m
Bilbao
Sun 11/1
7:30 am-10:57 pm
2 stops23h 27m
$930
Quickest round-trip
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Thu 9/10
6:50 pm-5:55 pm
1 stop14h 05m
Bilbao
Thu 9/17
6:50 am-11:55 am
1 stop14h 05m
$966
Sorted by cheapest first
Compare providers for flights from Seattle to Bilbao
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Bilbao in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Seattle-Bilbao flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Bilbao flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Bilbao flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Bilbao flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Bilbao flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Seattle to Bilbao
Have a flexible travel schedule? Discover the best time to fly to Bilbao from Seattle with our price prediction graph.
SEA-BIO
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Seattle to Bilbao
Reviews of airlines servicing Bilbao
Get insights into the airlines that provide service to Bilbao. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Bilbao. Reviews last updated August 31, 2026.
Peruse reviews from past customers who have flown with KLM,Delta, andUnited Airlines from Seattle to Bilbao to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.7
Entertainment
7.2
Crew
8.4
Boarding
7.8
Food
7.3
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Comfort
7.7
Entertainment
7.2
Crew
8.4
Boarding
7.8
Food
7.3
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Comfort
7.7
Entertainment
7.2
Crew
8.4
Boarding
7.8
Food
7.3
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Comfort
7.7
Entertainment
7.2
Crew
8.4
Boarding
7.8
Food
7.3
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Comfort
7.7
Entertainment
7.2
Crew
8.4
Boarding
7.8
Food
7.3
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Related info for your journey
Find useful and relevant information for your journey from Seattle to Bilbao. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Other flights to Bilbao
Explore flights to Bilbao departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 31, 2026.
Complete your trip
Complete your trip to Bilbao by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Seattle to Bilbao by cabin class
Find flights from Seattle to Bilbao, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and Bilbao flights
Browse other Seattle and Bilbao flight options. Last updated on August 31, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on August 31, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 4 airlines flying from Seattle to Bilbao
Discover the top 4 airlines that operate flights from Seattle to Bilbao. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated August 31, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$484 | Average$939 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$514 | Average$890 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$581 | Average$963 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$654 | Average$975 | FlexibilityNo cancel fee | On-timeN/A |