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$478+ Cheap flights from Portland (PDX) to Bilbao (BIO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — BIO
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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Find flight deals from Portland to Bilbao

Cheapest flights from Portland to Bilbao
Explore the most affordable flight options available from Portland to Bilbao. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 29, 2025.

This Delta deal was found by Cheapflights users on 10/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/135:30 amPDX - BIO
2 stops21h 00mDelta
Mon 11/176:50 amBIO - PDX
1 stop13h 35mDelta
Deal found 10/28$720
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/138:30 amPDX - BIO
2 stops24h 35mUnited Airlines
Mon 11/176:45 amBIO - PDX
2 stops20h 55mUnited Airlines
Deal found 10/28$788
This Air Canada deal was found by Cheapflights users on 10/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/217:00 pmPDX - BIO
2 stops36h 40mMultiple Airlines
Sun 11/306:45 amBIO - PDX
3 stops35h 30mMultiple Airlines
Deal found 10/28$1,184
This Air France deal was found by Cheapflights users on 10/28. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/211:59 pmPDX - BIO
2 stops18h 21mKLM
Sun 11/3011:55 amBIO - PDX
1 stop32h 30mKLM
Deal found 10/28$1,822
This Air Canada deal was found by Cheapflights users on 10/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/217:00 pmPDX - BIO
3 stops36h 40mAir Canada
Sun 11/306:45 amBIO - PDX
3 stops35h 30mAir Canada
Deal found 10/28$2,583

Cheap flight deals from Portland to Bilbao

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) 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 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$686
(United)

One-way from

$478
(KLM)

Popular in

May

Cheapest in

February

Average price

$800
Provider with most accurate pricing for Portland-Bilbao flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Bilbao flights.
Search Deals
From Portland to Bilbao
Search Deals
One-way flight from Portland to Bilbao
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($232 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($56 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland 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 2,558,603 searches. Data last updated October 29, 2025.
Use the filters below to find and compare flights from Portland to Bilbao that are best for you.

Fly from

Portland

Fly to

Bilbao

Route

Depart

Return

Price

PortlandBilbao

PDX - BIO

PDXBIO

Portland

Thu 11/13

5:30 am-11:30 am

2 stops21h 00m

Bilbao

Mon 11/17

6:50 am-11:25 am

1 stop13h 35m

$720

PortlandBilbao

PDX - BIO

PDXBIO

Portland

Thu 11/13

8:30 am-6:05 pm

2 stops24h 35m

Bilbao

Mon 11/17

6:45 am-6:40 pm

2 stops20h 55m

$788

PortlandBilbao

PDX - BIO

PDXBIO

Portland

Fri 11/21

7:00 pm-4:40 pm

2 stops36h 40m

Bilbao

Sun 11/30

6:45 am-9:15 am

3 stops35h 30m

$1,184

PortlandBilbao

PDX - BIO

PDXBIO

Portland

Fri 11/21

1:59 pm-5:20 pm

2 stops18h 21m

Bilbao

Sun 11/30

11:55 am-11:25 am

1 stop32h 30m

$1,822

PortlandBilbao

PDX - BIO

PDXBIO

Portland

Wed 4/22

1:38 pm-4:30 pm

2 stops17h 52m

$478

PortlandBilbao

PDX - BIO

PDXBIO

Portland

Wed 4/22

7:00 am-12:50 pm

3 stops44h 50m

$491

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Compare providers for flights from Portland 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 Portland to Bilbao in October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland-Bilbao flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland-Bilbao flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Portland-Bilbao flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland-Bilbao flights, Cheapflights users trust eDreams the most. eDreams 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 Portland-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 Portland to Bilbao

Have a flexible travel schedule? Discover the best time to fly to Bilbao from Portland with our price prediction graph.
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 Portland to Bilbao

What is the cheapest time of day to fly from PDX to BIO?

Find hourly flight availability from Portland to Bilbao. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 29, 2025.

When flying from Portland to Bilbao, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 32% versus a flight in the evening.

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 29, 2025.
See what other customers who have flown with Delta and KLM from Portland to Bilbao have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,993 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,993 reviews
Delta
7.9
Good
7,993 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
KLM
7.7
Good
1,406 reviews
Delta
7.9
Good
7,993 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

Find useful and relevant information for your journey from Portland to Bilbao. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Portland to Bilbao?

    For as low as $720, Delta can have you in Bilbao from Portland in 21h. Airlines will cover a distance of 5265 mi.

  • What are the cheapest airlines flying from Portland to Bilbao round-trip?

    Flying on KLM is currently your cheapest option to Bilbao, with prices starting at $576. Another option worth looking into is Delta, starting at $678 round trip. Users have found that KLM is 45% cheaper than the other options available to this destination.

  • Can I find deals for flights from Portland to Bilbao that include hotel bookings?

    Yes. In addition to deals on Portland to Bilbao flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Bilbao?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Bilbao.

  • Can I find deals for business class flights from Portland to Bilbao?

    Yes. Cheapflights offers flight deals from Portland to Bilbao by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for Portland to Bilbao

See prices for flight routes from nearby airports that may be better suited for you.
Boise to Bilbao flights

Top 2 airlines flying from Portland to Bilbao

Discover the top 2 airlines that operate flights from Portland 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 2,558,603 searches. Data last updated October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$576Average$815FlexibilityNo cancel feeOn-time75%
DeltaCheapest$678Average$965FlexibilityNo cancel feeOn-timeN/A

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