$444 Cheap Flights from Chicago (ORD) to Bilbao (BIO)

View $444 flight on Tue, Dec 9, 2025Opens in a new window

Popular airlines from Chicago O'Hare Intl. Airport (ORD) to Bilbao Airport (BIO)

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Cheap Flights from Chicago to Bilbao (ORD-BIO)

Prices were available within the past 7 days and start at $444 for one-way flights and $454 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Scandinavian Airlines
Sun, Jan 18 - Fri, Jan 30
ORD
Chicago
BIO
Bilbao
$454 Roundtrip, found 6 days ago
$454
Roundtrip
found 6 days ago
Select Scandinavian Airlines flight, departing Sun, Jan 18 from Chicago to Bilbao, returning Fri, Jan 30, priced at $454 found 6 days ago
Scandinavian Airlines
Thu, Jan 22 - Fri, Jan 30
ORD
Chicago
BIO
Bilbao
$464 Roundtrip, found 5 days ago
$464
Roundtrip
found 5 days ago
Select Scandinavian Airlines flight, departing Thu, Jan 22 from Chicago to Bilbao, returning Fri, Jan 30, priced at $464 found 5 days ago
TAP Portugal
Fri, Apr 17 - Sat, Apr 25
ORD
Chicago
BIO
Bilbao
$471 Roundtrip, found 2 hours ago
$471
Roundtrip
found 2 hours ago
Select TAP Portugal flight, departing Fri, Apr 17 from Chicago to Bilbao, returning Sat, Apr 25, priced at $471 found 2 hours ago
TAP Portugal
Sun, Nov 30 - Sat, Dec 13
ORD
Chicago
BIO
Bilbao
$478 Roundtrip, found 5 hours ago
$478
Roundtrip
found 5 hours ago
Select TAP Portugal flight, departing Sun, Nov 30 from Chicago to Bilbao, returning Sat, Dec 13, priced at $478 found 5 hours ago
Lufthansa
Mon, Nov 24 - Sun, Dec 7
ORD
Chicago
BIO
Bilbao
$518 Roundtrip, found 1 day ago
$518
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Mon, Nov 24 from Chicago to Bilbao, returning Sun, Dec 7, priced at $518 found 1 day ago
United
Tue, Dec 2 - Tue, Dec 9
ORD
Chicago
BIO
Bilbao
$518 Roundtrip, found 6 days ago
$518
Roundtrip
found 6 days ago
Select United flight, departing Tue, Dec 2 from Chicago to Bilbao, returning Tue, Dec 9, priced at $518 found 6 days ago
Lufthansa
Mon, Nov 24 - Sun, Dec 7
ORD
Chicago
BIO
Bilbao
$520 Roundtrip, found 1 day ago
$520
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Mon, Nov 24 from Chicago to Bilbao, returning Sun, Dec 7, priced at $520 found 1 day ago
Swiss International Air Lines
Wed, Jan 14 - Mon, Jan 19
ORD
Chicago
BIO
Bilbao
$524 Roundtrip, found 6 days ago
$524
Roundtrip
found 6 days ago
Select Swiss International Air Lines flight, departing Wed, Jan 14 from Chicago to Bilbao, returning Mon, Jan 19, priced at $524 found 6 days ago
Delta
Wed, Nov 19 - Wed, Dec 3
ORD
Chicago
BIO
Bilbao
$525 Roundtrip, found 6 days ago
$525
Roundtrip
found 6 days ago
Select Delta flight, departing Wed, Nov 19 from Chicago to Bilbao, returning Wed, Dec 3, priced at $525 found 6 days ago
Iberia
Mon, Nov 24 - Sun, Dec 7
ORD
Chicago
BIO
Bilbao
$540 Roundtrip, found 1 day ago
$540
Roundtrip
found 1 day ago
Select Iberia flight, departing Mon, Nov 24 from Chicago to Bilbao, returning Sun, Dec 7, priced at $540 found 1 day ago

Frequently asked questions

How much does a flight from O'Hare Intl. Airport (ORD) to Bilbao Airport (BIO) cost?
Grab a cheap one-way flight from $444 or cheap return flight from $454 from O'Hare Intl. Airport (ORD) to Bilbao Airport (BIO) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from O'Hare Intl. Airport (ORD) to Bilbao Airport (BIO)?
The cheapest month to fly from ORD to BIO is January, when demand is low. Off-peak months are typically when you'll find lower airfares between these airports.
What is the cheapest airline that flies from O'Hare Intl. Airport (ORD) to Bilbao Airport (BIO)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find the carrier with the cheapest ORD to BIO flight.
How many flights per day from O'Hare Intl. Airport (ORD) to Bilbao Airport (BIO)?
There are no daily nonstop flights from O'Hare Intl. Airport (ORD) to Bilbao Airport (BIO). But you can choose flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from ORD to BIO?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can change depending on a number of factors, including the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from O'Hare Intl. Airport (ORD) to Bilbao Airport (BIO)?
To land at Bilbao Airport (BIO) without delays, book a flight that leaves O'Hare Intl. Airport (ORD) 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 O'Hare Intl. Airport (ORD) to Bilbao Airport (BIO) last-minute?
Booking your flight from ORD to BIO right before your trip is typically more expensive. However, if you're flexible with your departure times and dates, you could score a cheap last-minute fare.
Is it cheaper to book an ORD to BIO flight and hotel package?
Compared with arranging flights and hotels separately, booking an ORD to BIO flight and hotel package with Expedia could result in significant savings. What's more, managing everything in one place will take the stress out of travel planning. Just secure your flights and choose from our extensive range of stays, then personalize your trip with extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from O'Hare Intl. Airport (ORD) to Bilbao Airport (BIO)?
Usually, it's possible to reschedule or cancel your ORD to BIO flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
O'Hare Intl.
Destination airport
Bilbao
Airlines serving
Aer Lingus, Air Canada, Air Europa, Air France, American Airlines, Austrian Airlines, Brussels Airlines, Delta, Finnair, Iberia, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United
Roundtrip price
$453
Distance
4118 mi

Book with confidence

Chicago to Bilbao Flights

The cheapest times to fly from Chicago 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 Chicago to Bilbao are during the month of January. You can find some of the cheapest flights from Chicago to Bilbao with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Chicago to Bilbao

Sunday is one of the best days to book for cheap flights from Chicago 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 Chicago 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 Chicago to Bilbao in 2025. You can also book with separate airlines for your outbound and return journeys, from $444 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 Chicago 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 Chicago 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.

 

Chicago to Bilbao Flights

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*Available to One Key members.