PDX - BIO

$300 Find Cheap Flights from Portland to Bilbao

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to Bilbao departing on 11/17. 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

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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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

Tue, Mar 10 - Thu, Mar 12
United Airlines Logo
12:40 pm - 4:40 pmPDX-BIO
20h 00m2 stops
United Airlines Logo
6:45 am - 10:08 pmBIO-PDX
23h 23m2 stops
$1,281United Airlines
Find Deal
Tue, Mar 10 - Thu, Mar 12
United Airlines Logo
8:15 am - 4:40 pmPDX-BIO
24h 25m2 stops
United Airlines Logo
6:45 am - 12:19 amBIO-PDX
25h 34m3 stops
$1,282United Airlines
Find Deal

Everything you should know

Cheapest round-trip
$1,281
United Airlines
Tue 3/10Thu 3/12
PDX - BIO • 2 stops
Cheapest one-way
$300
Multiple Airlines
Mon 11/17
PDX - BIO • 3 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Bilbao!
Booking Insights

Good to know

Low seasonNovember
Cheapest flight$300
Best time to beat the crowds with an average 36% drop in price.
Most popular time to fly and prices are also 27% 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 $300 for a one-way ticket and $1,281 for a round-trip.

  • 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, and Star Alliance are the airline alliances operating flights between Portland and Bilbao, with SkyTeam being the most commonly used for this route.

  • 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 $1,099 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 $1,080 and an overall rating of 7.8.

  • 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 7954 reviews
8.2Boarding
8.5Crew
7.9Entertainment
7.3Food
7.9Comfort
Airline reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

10.0 ExcellentAnonymous, Sep 2025CLT - BOS
Read more Delta reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

The food was terrible especially for a 15 hour international flight. The crew was unpleasant as well.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Quick check in. Everything went smooth. I don't know what can be done about airline food.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Nothing special. The crew never went out of their way for anything.

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

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!

Legroom not all it could be, especially when the seat in front is reclined. Otherwise it was good, food and beverage were nice.

This portion of the flight was through Indigo. A local carrier. So all economy seating. No real service some refreshments for purchase standard economy stuff.

You should not have to pay for WiFi in business class

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

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