$434 Cheap Flights from Phoenix (PHX) to Bilbao (BIO)

View $434 flight on Mon, Aug 18, 2025Opens in a new window

Popular airlines from Phoenix Sky Harbor Intl. Airport (PHX) to Bilbao Airport (BIO)

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Cheap Flights from Phoenix to Bilbao (PHX-BIO)

Prices were available within the past 7 days and start at $434 for one-way flights and $510 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Oct 6 - Wed, Oct 15
PHX
Phoenix
BIO
Bilbao
$510 Roundtrip, found 5 days ago
$510
Roundtrip
found 5 days ago
Select United flight, departing Mon, Oct 6 from Phoenix to Bilbao, returning Wed, Oct 15, priced at $510 found 5 days ago
Delta
Sun, Oct 5 - Tue, Oct 21
PHX
Phoenix
BIO
Bilbao
$515 Roundtrip, found 5 days ago
$515
Roundtrip
found 5 days ago
Select Delta flight, departing Sun, Oct 5 from Phoenix to Bilbao, returning Tue, Oct 21, priced at $515 found 5 days ago
Delta
Mon, Sep 29 - Wed, Oct 8
PHX
Phoenix
BIO
Bilbao
$517 Roundtrip, found 6 days ago
$517
Roundtrip
found 6 days ago
Select Delta flight, departing Mon, Sep 29 from Phoenix to Bilbao, returning Wed, Oct 8, priced at $517 found 6 days ago
Lufthansa
Tue, Aug 5 - Wed, Dec 24
PHX
Phoenix
BIO
Bilbao
$521 Roundtrip, found 5 days ago
$521
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Tue, Aug 5 from Phoenix to Bilbao, returning Wed, Dec 24, priced at $521 found 5 days ago
Lufthansa
Tue, Aug 5 - Wed, Dec 24
PHX
Phoenix
BIO
Bilbao
$526 Roundtrip, found 5 days ago
$526
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Tue, Aug 5 from Phoenix to Bilbao, returning Wed, Dec 24, priced at $526 found 5 days ago
Lufthansa
Mon, Sep 15 - Tue, Sep 30
PHX
Phoenix
BIO
Bilbao
$530 Roundtrip, found 5 days ago
$530
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Mon, Sep 15 from Phoenix to Bilbao, returning Tue, Sep 30, priced at $530 found 5 days ago
American Airlines
Mon, Sep 8 - Fri, Sep 19
PHX
Phoenix
BIO
Bilbao
$535 Roundtrip, found 5 days ago
$535
Roundtrip
found 5 days ago
Select American Airlines flight, departing Mon, Sep 8 from Phoenix to Bilbao, returning Fri, Sep 19, priced at $535 found 5 days ago
Iberia
Tue, Aug 12 - Wed, Aug 20
PHX
Phoenix
BIO
Bilbao
$545 Roundtrip, found 5 days ago
$545
Roundtrip
found 5 days ago
Select Iberia flight, departing Tue, Aug 12 from Phoenix to Bilbao, returning Wed, Aug 20, priced at $545 found 5 days ago
KLM
Mon, Oct 6 - Wed, Oct 8
PHX
Phoenix
BIO
Bilbao
$568 Roundtrip, found 5 days ago
$568
Roundtrip
found 5 days ago
Select KLM flight, departing Mon, Oct 6 from Phoenix to Bilbao, returning Wed, Oct 8, priced at $568 found 5 days ago
Air Canada
Sun, Oct 19 - Fri, Oct 31
PHX
Phoenix
BIO
Bilbao
$600 Roundtrip, found 2 days ago
$600
Roundtrip
found 2 days ago
Select Air Canada flight, departing Sun, Oct 19 from Phoenix to Bilbao, returning Fri, Oct 31, priced at $600 found 2 days ago
Flights from Phoenix (PHX) to Bilbao (BIO)
Origin airport
Sky Harbor Intl.
Destination airport
Bilbao
Airlines serving
Aer Lingus, Air Canada, Air Europa, Air France, American Airlines, Brussels Airlines, Delta, Finnair, Iberia, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, Turkish Airlines, United
Roundtrip price
$509
Distance
5505 mi

Phoenix to Bilbao Flights

The cheapest times to fly from Phoenix to Bilbao

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Phoenix to Bilbao are during the month of October. You can find some of the cheapest flights from Phoenix to Bilbao with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Phoenix to Bilbao

Sunday is one of the best days to book for cheap flights from Phoenix to Bilbao: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Phoenix to Bilbao

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Phoenix to Bilbao in 2025. You can also book with separate airlines for your outbound and return journeys, from $434 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Phoenix to Bilbao flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Phoenix to Bilbao airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Sky Harbor Intl. Airport (PHX) to Bilbao Airport (BIO) cost?
Discover the latest flight deals from PHX to BIO by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from PHX to BIO?
The cheapest flights from PHX to BIO are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from PHX to BIO?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from PHX to BIO. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Sky Harbor Intl. Airport (PHX) to Bilbao Airport (BIO)?
Direct flights from Sky Harbor Intl. Airport (PHX) to Bilbao Airport (BIO) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel details and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from PHX to BIO?
Generally you'll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can vary depending on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Sky Harbor Intl. Airport (PHX) to Bilbao Airport (BIO)?
To arrive at Bilbao Airport (BIO) on time, choose a flight that leaves Sky Harbor Intl. Airport (PHX) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Sky Harbor Intl. Airport (PHX) to Bilbao Airport (BIO) last-minute?
Booking your flight from PHX to BIO shortly before your journey is generally more expensive. But if you're flexible with your departure dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book a PHX to BIO flight and hotel package?
Compared with arranging hotels and flights separately, booking a PHX to BIO flight and hotel package with Expedia could lead to significant savings. What's more, managing everything in one place will take the stress out of travel planning. Simply pick your flights and choose from our extensive range of hotels, then customize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Sky Harbor Intl. Airport (PHX) to Bilbao Airport (BIO)?
If you booked your PHX to BIO flight in the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

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*Available to One Key members.