$400+ 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 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BIO
Nov 13 — Nov 201
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
One-way
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 October 14, 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 October 14, 2026.
This Booking.com deal was found by Cheapflights users on 10/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/92:50 pm -
1 stop22h 05m
Sun 12/136:45 am -
1 stop14h 15m
Deal found 10/12![Lufthansa logo]()
$810
This Delta deal was found by Cheapflights users on 10/10. 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 11/83:25 pm -
1 stop17h 00m
Sun 11/1511:55 am -
1 stop32h 52m
Deal found 10/10![Delta logo]()
$821
This United Airlines deal was found by Cheapflights users on 10/13. 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.
Wed 12/92:50 pm -
1 stop22h 05m
Sun 12/136:45 am -
1 stop14h 15m
Deal found 10/13![United Airlines logo]()
$822
This Delta deal was found by Cheapflights users on 10/10. 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.
Sat 11/711:59 pm -
2 stops26h 31m
Sun 11/1511:55 am -
1 stop32h 52m
Deal found 10/10![Delta logo]()
$825
This FlightHub deal was found by Cheapflights users on 10/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/82:50 pm -
1 stop22h 05m
Sat 11/146:30 pm -
1 stop27h 30m
Deal found 10/10![Lufthansa logo]()
$831
This United Airlines deal was found by Cheapflights users on 10/13. 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.
Fri 11/272:50 pm -
1 stop23h 20m
Fri 12/46:45 am -
2 stops36h 39m
Deal found 10/13![United Airlines logo]()
$838
This United Airlines deal was found by Cheapflights users on 10/10. 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.
Sun 11/85:05 am -
2 stops27h 40m
Sat 11/1411:45 am -
1 stop34h 15m
Deal found 10/10![United Airlines logo]()
$839
This FlightHub deal was found by Cheapflights users on 10/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/96:45 pm -
2 stops19h 30m
Sun 12/139:15 am -
2 stops20h 16m
Deal found 10/13![Multiple Airlines logo]()
$843
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 October 14, 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 October 14, 2026.
This United Airlines deal was found by Cheapflights users on 10/14. 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.
Sat 4/1010:40 pm -
2 stops27h 30m
Thu 4/156:50 am -
1 stop14h 05m
Deal found 10/14![United Airlines logo]()
$714
This Delta deal was found by Cheapflights users on 10/10. 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.
Tue 11/1010:39 am -
2 stops21h 46m
Sun 11/1511:55 am -
1 stop32h 52m
Deal found 10/10![Delta logo]()
$825
This United Airlines deal was found by Cheapflights users on 10/10. 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.
Sat 3/2011:50 pm -
2 stops38h 05m
Sun 3/286:50 am -
1 stop14h 05m
Deal found 10/10![United Airlines logo]()
$775
This Delta deal was found by Cheapflights users on 10/13. 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.
Fri 11/279:25 am -
2 stops23h 00m
Fri 12/411:55 am -
2 stops19h 09m
Deal found 10/13![Delta logo]()
$835
This United Airlines deal was found by Cheapflights users on 10/10. 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.
Fri 3/197:32 pm -
2 stops19h 38m
Sun 3/2811:55 am -
1 stop14h 04m
Deal found 10/10![United Airlines logo]()
$816
This United Airlines deal was found by Cheapflights users on 10/13. 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.
Wed 12/92:50 pm -
1 stop22h 05m
Sun 12/136:45 am -
1 stop14h 15m
Deal found 10/13![United Airlines logo]()
$822
This United Airlines deal was found by Cheapflights users on 10/13. 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.
Fri 11/272:50 pm -
1 stop23h 20m
Fri 12/46:45 am -
2 stops36h 39m
Deal found 10/13![United Airlines logo]()
$838
This United Airlines deal was found by Cheapflights users on 10/14. 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.
Sat 11/2110:56 pm -
2 stops27h 44m
Sat 11/286:45 am -
2 stops39h 15m
Deal found 10/14![United Airlines logo]()
$1,004
Last-minute flights from Seattle to BilbaoDiscover last-minute flight deals from Seattle to Bilbao. Data last updated October 14, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Bilbao. Data last updated October 14, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 10/10. 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.
Sat 11/711:59 pm -
2 stops26h 31m
Sun 11/1511:55 am -
1 stop32h 52m
Deal found 10/10![Delta logo]()
$825
This United Airlines deal was found by Cheapflights users on 10/10. 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.
Sat 11/711:17 pm -
2 stops27h 23m
Sat 11/1411:45 am -
1 stop34h 15m
Deal found 10/10![United Airlines logo]()
$850
This Delta deal was found by Cheapflights users on 10/10. 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.
Sat 11/74:05 pm -
1 stop16h 20m
Sat 11/146:50 am -
1 stop13h 57m
Deal found 10/10![Delta logo]()
$871
This Delta deal was found by Cheapflights users on 10/10. 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.
Sat 11/710:51 am -
2 stops21h 34m
Fri 11/1311:55 am -
1 stop32h 52m
Deal found 10/10![Delta logo]()
$875
This Delta deal was found by Cheapflights users on 10/10. 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 11/83:25 pm -
1 stop17h 00m
Sun 11/1511:55 am -
1 stop32h 52m
Deal found 10/10![Delta logo]()
$821
This FlightHub deal was found by Cheapflights users on 10/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/82:50 pm -
1 stop22h 05m
Sat 11/146:30 pm -
1 stop27h 30m
Deal found 10/10![Lufthansa logo]()
$831
This United Airlines deal was found by Cheapflights users on 10/10. 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.
Sun 11/85:05 am -
2 stops27h 40m
Sat 11/1411:45 am -
1 stop34h 15m
Deal found 10/10![United Airlines logo]()
$839
This United Airlines deal was found by Cheapflights users on 10/13. 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.
Fri 11/272:50 pm -
1 stop23h 20m
Fri 12/46:45 am -
2 stops36h 39m
Deal found 10/13![United Airlines logo]()
$838
One-way flights from Seattle to BilbaoSearch for one-way flight options from Seattle to Bilbao. Find affordable one-way fares based on user searches. Data last updated October 14, 2026.
Search for one-way flight options from Seattle to Bilbao. Find affordable one-way fares based on user searches. Data last updated October 14, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/12:35 pm -
3 stops33h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Multiple Airlines logo]()
$400
This Mytrip deal was found by Cheapflights users on 10/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/11:50 pm -
1 stop18h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Lufthansa logo]()
$493
This United Airlines deal was found by Cheapflights users on 10/14. 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.
Sun 11/18:09 am -
2 stops24h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![United Airlines logo]()
$504
This Trip.com deal was found by Cheapflights users on 10/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/201:50 pm -
1 stop24h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Lufthansa logo]()
$818
This Kiwi.com deal was found by Cheapflights users on 10/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2011:09 pm -
3 stops38h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Multiple Airlines logo]()
$836
This Ovago deal was found by Cheapflights users on 10/13. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1912:47 am -
2 stops27h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Iberia logo]()
$848
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 October 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $710 (Mytrip) |
One-way from | $400 (Kiwi.com) |
Popular in | July |
Cheapest in | January |
Average price | $731 |
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 October 14, 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 11/1
2:35 pm-9:25 am
3 stops33h 50m
Bilbao
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$400
Quickest round-trip
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Sun 11/1
1:50 pm-5:00 pm
1 stop18h 10m
Bilbao
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$493
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Sun 11/1
8:09 am-5:45 pm
2 stops24h 36m
Bilbao
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$504
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Sat 4/10
10:40 pm-11:10 am
2 stops27h 30m
Bilbao
Thu 4/15
6:50 am-11:55 am
1 stop14h 05m
$714
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Sat 3/20
11:50 pm-9:55 pm
2 stops38h 05m
Bilbao
Sun 3/28
6:50 am-11:55 am
1 stop14h 05m
$775
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Fri 3/19
7:32 pm-11:10 pm
2 stops19h 38m
Bilbao
Sun 3/28
11:55 am-4:59 pm
1 stop14h 04m
$816
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Sun 12/20
1:50 pm-10:50 pm
1 stop24h 00m
Bilbao
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$818
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Wed 12/9
2:50 pm-9:55 pm
1 stop22h 05m
Bilbao
Sun 12/13
6:45 am-12:00 pm
1 stop14h 15m
$822
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Tue 11/10
10:39 am-5:25 pm
2 stops21h 46m
Bilbao
Sun 11/15
11:55 am-11:47 am
1 stop32h 52m
$825
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Fri 11/27
9:25 am-5:25 pm
2 stops23h 00m
Bilbao
Fri 12/4
11:55 am-10:04 pm
2 stops19h 09m
$835
Showing 1-10 of 13 resultsSorted 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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| 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 October 14, 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.
Boarding
7.8
Overall
7.8
Entertainment
7.2
Crew
8.4
Comfort
7.7
Food
7.3
Reviews
1 / 20
8.0
ExcellentMeghana,Aug 2026
QRO - ATL
Boarding
7.8
Overall
7.8
Entertainment
7.2
Crew
8.4
Comfort
7.7
Food
7.3
Reviews
1 / 20
8.0
ExcellentMeghana,Aug 2026
QRO - ATL
Boarding
7.8
Overall
7.8
Entertainment
7.2
Crew
8.4
Comfort
7.7
Food
7.3
Reviews
1 / 20
8.0
ExcellentMeghana,Aug 2026
QRO - ATL
Boarding
7.8
Overall
7.8
Entertainment
7.2
Crew
8.4
Comfort
7.7
Food
7.3
Reviews
1 / 20
8.0
ExcellentMeghana,Aug 2026
QRO - ATL
Boarding
7.8
Overall
7.8
Entertainment
7.2
Crew
8.4
Comfort
7.7
Food
7.3
Reviews
1 / 20
8.0
ExcellentMeghana,Aug 2026
QRO - ATL
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 October 14, 2026.
Complete your trip
Complete your trip to Bilbao by adding a car rental and/or hotel reservation to your travel itinerary.
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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 October 14, 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 October 14, 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 October 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$484 | Average$939 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$514 | Average$885 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$581 | Average$963 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$654 | Average$963 | FlexibilityNo cancel fee | On-timeN/A |