PDX - BIO

$347 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 10/5. 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
$832
Typical prices: $852-$622
Delta
Sat 10/3Wed 10/14
PDX - BIO • 2 stops
Cheapest one-way
$347
Multiple Airlines
Mon 10/5
PDX - BIO • 3 stops
Top airlines
Cheapest • from $832 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Portland and Bilbao. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 100% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Bilbao!
Flight Deals
Booking Insights
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

Sat, Oct 3 - Wed, Oct 14
Delta Logo
10:05 pm - 5:30 pm
PDX
-
BIO
34h 25m
2 stops
Delta Logo
6:45 am - 11:10 am
BIO
-
PDX
13h 25m
1 stop
$832Delta
Wed, Sep 30 - Wed, Oct 14
United Airlines Logo
1:03 pm - 11:25 pm
PDX
-
BIO
25h 22m
2 stops
United Airlines Logo
6:50 am - 7:06 pm
BIO
-
PDX
21h 16m
2 stops
$833United Airlines
Sat, Oct 3 - Wed, Oct 14
United Airlines Logo
10:35 pm - 4:00 pm
PDX
-
BIO
32h 25m
2 stops
United Airlines Logo
6:50 am - 2:51 pm
BIO
-
PDX
17h 01m
2 stops
$834United Airlines
Sat, Oct 3 - Thu, Oct 15
Delta Logo
10:05 pm - 5:30 pm
PDX
-
BIO
34h 25m
2 stops
Delta Logo
6:45 am - 10:26 pm
BIO
-
PDX
24h 41m
2 stops
$842Delta
Wed, Sep 30 - Fri, Oct 16
United Airlines Logo
1:03 pm - 11:25 pm
PDX
-
BIO
25h 22m
2 stops
United Airlines Logo
6:45 am - 9:30 am
BIO
-
PDX
35h 45m
2 stops
$843United Airlines
Sat, Oct 3 - Fri, Oct 16
United Airlines Logo
10:35 pm - 4:00 pm
PDX
-
BIO
32h 25m
2 stops
United Airlines Logo
2:00 pm - 9:30 am
BIO
-
PDX
28h 30m
2 stops
$844United Airlines
Wed, Sep 30 - Wed, Oct 14
United Airlines Logo
12:45 pm - 10:25 pm
PDX
-
BIO
24h 40m
3 stops
United Airlines Logo
6:50 am - 7:06 pm
BIO
-
PDX
21h 16m
2 stops
$846United Airlines
Sat, Oct 3 - Fri, Oct 16
United Airlines Logo
10:59 pm - 11:25 pm
PDX
-
BIO
39h 26m
2 stops
United Airlines Logo
6:45 am - 11:02 pm
BIO
-
PDX
25h 17m
3 stops
$850United Airlines
Wed, Sep 30 - Thu, Oct 15
United Airlines Logo
12:45 pm - 10:25 pm
PDX
-
BIO
24h 40m
3 stops
United Airlines Logo
6:50 am - 10:18 pm
BIO
-
PDX
24h 28m
2 stops
$856United Airlines
Sun, Sep 13 - Wed, Sep 23
Delta Logo
1:38 pm - 5:30 pm
PDX
-
BIO
18h 52m
2 stops
Delta Logo
6:45 am - 11:10 am
BIO
-
PDX
13h 25m
1 stop
$862Delta
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.

What is the cheapest month to fly from Portland to Bilbao?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Portland to Bilbao, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Portland to Bilbao is January, where tickets cost $0 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,363 and $1,340 respectively.

Good to know

Low seasonNovember
Cheapest flight$347
Best time to beat the crowds with an average 44% drop in price.
Most popular time to fly with an average 15% increase in price.
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 $347 for a one-way ticket and $832 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 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 $818 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 $963 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 8467 reviews
8.5Crew
7.2Food
8.1Boarding
7.9Comfort
7.8Entertainment
Airline reviews

Seats in Delta Main are unbelievably close to the seat in front of. Hard to get a backpack under the seat.

8.0 ExcellentMatthew, May 2026
OKC - ATL
Read more Delta reviews

Seats in Delta Main are unbelievably close to the seat in front of. Hard to get a backpack under the seat.

The flight was operated by Latam. The aircraft had a technical issue and the flight was delayed for the next day. They grounded other passengers to get their airplane assigned to my flight. Most of he ground staff don't speak English (Orlando Airport), but were very polite.The crew on the other hand could speak English and Portuguese. On board service was good.

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

In ATL they have two sets of departure screens. Follow what is on your airline's departure board - the ATL Airport Authority departure board had completely incorrect details about the gate assignment for my flight, which would have made me miss boarding.

Flight was delayed it was hot while sitting on the plane, one engine was working on the plane until they had to do some jimmy rigging down the runway in order for the other engine to charge up. It was ridiculous

The flight was very good and the staff was very friendly and helpful!

The only thing I would say is we tried to get on a standby earlier flight, but with our fair we couldn’t. That seems senseless to leave with open seats..

Very easy to use and convenient, you can perform any action within the same portal

In a world of delays, Delta was on time both ways! Boarding was fast and efficient. Staff was friendly. AND wifi worked.

WiFi didn’t work. Flight delayed 3 hours Crew members were illiterate Seat lean back did not work.

As per usual when you Hit the UK it's a slow process through customs Not as efficient at Thailand for sure

It was really nice experience by flying this klm flight.I personally recommend everyone to please try this klm flight

It was really nice journey i personally recommend klm flight

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

Empty seats next to me - wish it had been for a longer flight!!

I’m grateful for the KLM Air France shuttle bus service to Ottawa. However due to construction and other issues related to the chaotic Uber pickup system at YUL, it’s a challenge to find the Kelios bus service to Ottawa. The signs are not clear or even available. No staff to guide passengers. It’s a stressful experience.

Flight was on time, staff are friendly and helpful onboard.

Delay on my previous leg, had to run to catch my flight. But that happens. Overall ok.

Delay and had to run between flight to get my connection due to this delay but besides that the overall experience was ok. I arrived with just an hour of delay.

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.

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

Information on your arrival and departure airports