PDX - BIO

$674 Find Cheap Flights from Portland to Bilbao

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to Bilbao departing on 11/13. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Bilbao

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Bilbao, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Bilbao, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$674
United Airlines
Thu 11/13Mon 11/17
PDX - BIO • 2 stops
Cheapest one-way
Multiple Airlines
Thu 10/30
PDX - BIO • multi-stop
Top airlines
United Airlines
Cheapest • from $674 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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Flight Deals

Cheap Flights from Portland to Bilbao (PDX-BIO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portland to Bilbao that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portland to Bilbao

Thu, Nov 13 - Mon, Nov 17
United Airlines Logo
8:30 am - 6:05 pmPDX-BIO
24h 35m2 stops
United Airlines Logo
12:50 pm - 12:26 amBIO-PDX
20h 36m2 stops
$674United Airlines
Find Deal
Fri, Mar 13 - Sat, Mar 21
Multiple Airlines Logo
11:10 pm - 12:50 pmPDX-BIO
29h 40m2 stops
Multiple Airlines Logo
6:45 am - 10:57 pmBIO-PDX
24h 12m2 stops
$686Multiple Airlines
Find Deal
Thu, Nov 13 - Mon, Nov 17
Delta Logo
5:30 am - 11:30 amPDX-BIO
21h 00m2 stops
Delta Logo
6:50 am - 11:25 amBIO-PDX
13h 35m1 stop
$720Delta
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Wed, Nov 12 - Mon, Nov 17
Delta Logo
12:35 am - 11:30 amPDX-BIO
25h 55m2 stops
Delta Logo
6:50 am - 11:25 amBIO-PDX
13h 35m1 stop
$721Delta
Find Deal
Wed, Mar 25 - Wed, Apr 8
KLM Logo
2:25 pm - 4:30 pmPDX-BIO
18h 05m1 stop
KLM Logo
6:50 am - 11:20 amBIO-PDX
13h 30m1 stop
$735KLM
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Wed, Mar 25 - Wed, Apr 8
Air Canada Logo
9:50 am - 12:05 pmPDX-BIO
18h 15m2 stops
Air Canada Logo
6:45 am - 2:40 pmBIO-PDX
40h 55m2 stops
$742Air Canada
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Wed, Mar 25 - Wed, Apr 8
KLM Logo
2:25 pm - 4:30 pmPDX-BIO
18h 05m1 stop
KLM Logo
7:10 am - 4:29 pmBIO-PDX
18h 19m2 stops
$751KLM
Find Deal
Wed, Mar 25 - Wed, Apr 8
Air Canada Logo
9:50 am - 12:05 pmPDX-BIO
18h 15m2 stops
Air Canada Logo
7:15 am - 6:30 pmBIO-PDX
20h 15m3 stops
$766Air Canada
Find Deal
Sat, Dec 20 - Mon, Jan 5
American Airlines Logo
12:49 am - 8:30 amPDX-BIO
22h 41m2 stops
American Airlines Logo
6:45 am - 9:19 pmBIO-PDX
23h 34m2 stops
$2,736American Airlines
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Thu, Nov 20 - Sun, Nov 30
American Airlines Logo
12:59 am - 12:50 pmPDX-BIO
26h 51m2 stops
American Airlines Logo
9:15 am - 11:36 pmBIO-PDX
23h 21m2 stops
$5,634American Airlines
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Booking Insights

KAYAK's insights & trends for Portland to Bilbao flights

Get data-powered insights and trends into flights from Portland to Bilbao to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Portland to Bilbao?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Portland to Bilbao were found on United Airlines ($674) and Delta ($720).

Which airlines fly non-stop between Portland and Bilbao?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Portland to Bilbao.

There are 2 airlines that fly nonstop from Portland to Bilbao. They are Delta and KLM. The cheapest airline for this route is KLM, with the best round-trip deal found costing $576. On average, the best prices for this route can be found at KLM.

Good to know

Low seasonFebruary
Cheapest flight$674
Best time to beat the crowds with an average 33% drop in price.
Most popular time to fly and prices are also 25% lower on average.
Flight from Portland to Bilbao

When to book flights from Portland to Bilbao

Are your dates flexible? Find out the best times to travel from Portland to Bilbao based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Portland to Bilbao

  • What is the cheapest flight from Portland to Bilbao?

    In the last 3 days, the lowest price for a flight from Portland to Bilbao was $674 for a round-trip ticket.

  • Do I need a passport to fly between Portland and Bilbao?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Portland and on arrival in Bilbao.

  • Which aircraft models fly most regularly from Portland to Bilbao?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Portland to Bilbao?

    SkyTeam is the only airline alliance operating flights between Portland and Bilbao.

  • Which is the best airline for flights from Portland to Bilbao, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from Portland to Bilbao are Delta and KLM. With an average price for the route of $965 and an overall rating of 7.9, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $815 and an overall rating of 7.7.

  • How does KAYAK find such low prices on flights from Portland to Bilbao?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Portland to Bilbao.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Portland to Bilbao?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Bilbao from Portland is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Portland to Bilbao?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Bilbao with an airline and back to Portland with another airline. Booking your flights between Portland and BIO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portland to Bilbao?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Bilbao from Portland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Portland to Bilbao

 
See real verified KAYAK customer reviews for airlines flying from Portland to Bilbao. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Portland to Bilbao? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 7993 reviews
7.3Food
8.5Crew
7.9Comfort
8.2Boarding
7.9Entertainment
Airline reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

8.0 ExcellentJulie, Oct 2025LAX - SFO
Read more Delta reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

The aircraft interior is old and tired on this aircraft. The entertainment system never worked despite the crews attempt to reset the system.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Old plane and old configuration/seats but still comfortable for a morning flight

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

Flight was crowded and the woman sitting on my left was large & kept crouching in to my space. You need bigger seats or smaller passengers to fit into the seats you DO have! Snack were OK. Would appreciate if airlines had more savory rather than sweet snacks, thank you!

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

Couldn’t get boarding pass in SLC even with help from a redcoat, so had to find a desk in AMS to get boarding pass. Technical problems so not sure why. Very inconvenient. The KLM app is not as user friendly as most apps. Also had to wait almost an hour on the tarmac for a fuel truck, which caused us to miss a connecting bus in LUX.

The immigration hall in Amsterdam was understaffed, so passport checking was slower than it should be for a major airport. They need to get the automatic readers up and running for non EU passport holders. Waiting in line after a long flight feels a bit abusive.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

Short flight so it was okay. Nice crew, all very pleasant and professional. We were near the back in row 27 so just as we got our drinks, we started our descent so had to drink very quickly!

KLM remains a quality flag carrier airline which maintains its standards whilst all their competitors are lowering theirs.

The baggage drop-off in Stuttgart is bad: after online check-in you cannot use the automated baggage drop off as indicated on the website. You can use the terminals but have to cue to 1 of three open and slowly working counters to drop the bags. took about 45 minutes wait time.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

The service was great. However the lounge only gets passing grade

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

Everything you need to know for your flight from Portland to Bilbao

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