ORD - BIO

$267 Find Cheap Flights from Chicago 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 Chicago to Bilbao departing on 1/30. 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 Chicago 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 Chicago to Bilbao, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$453
Overall average: $750
Multiple Airlines
Tue 2/24Tue 3/3
ORD - BIO • 1 stop
Cheapest one-way
$267
Multiple Airlines
Fri 1/30
ORD - BIO • 3 stops
Top airlines
United Airlines
Cheapest • from $461 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
March
Cheapest • 16% price drop
September
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 Chicago to Bilbao (ORD-BIO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Chicago 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 Chicago to Bilbao

Tue, Feb 24 - Tue, Mar 3
Multiple Airlines Logo
5:55 pm - 12:50 pm
ORD
-
BIO
11h 55m1 stop
Multiple Airlines Logo
7:25 am - 2:10 pm
BIO
-
ORD
13h 45m1 stop
$453Multiple Airlines
Tue, Feb 24 - Tue, Mar 3
United Airlines Logo
12:05 pm - 10:50 am
ORD
-
BIO
15h 45m2 stops
United Airlines Logo
7:25 am - 2:10 pm
BIO
-
ORD
13h 45m1 stop
$461United Airlines
Fri, Feb 6 - Fri, Feb 13
Lufthansa Logo
9:50 pm - 11:20 pm
ORD
-
BIO
18h 30m1 stop
Lufthansa Logo
11:35 am - 6:25 pm
BIO
-
ORD
13h 50m1 stop
$488Lufthansa
Fri, Feb 20 - Fri, Feb 27
Iberia Logo
5:40 pm - 12:50 pm
ORD
-
BIO
12h 10m1 stop
Iberia Logo
9:15 am - 2:55 pm
BIO
-
ORD
12h 40m1 stop
$492Iberia
Fri, Feb 6 - Fri, Feb 13
American Airlines Logo
11:44 am - 8:30 am
ORD
-
BIO
13h 46m2 stops
American Airlines Logo
9:15 am - 2:55 pm
BIO
-
ORD
12h 40m1 stop
$496American Airlines
Fri, Feb 20 - Fri, Feb 27
Iberia Logo
11:38 am - 8:30 am
ORD
-
BIO
13h 52m2 stops
Iberia Logo
9:15 am - 2:55 pm
BIO
-
ORD
12h 40m1 stop
$497Iberia
Fri, Feb 6 - Fri, Feb 13
American Airlines Logo
11:44 am - 8:30 am
ORD
-
BIO
13h 46m2 stops
American Airlines Logo
6:45 am - 7:40 pm
BIO
-
ORD
19h 55m2 stops
$506American Airlines
Fri, Feb 27 - Tue, Mar 3
United Airlines Logo
9:50 pm - 11:20 pm
ORD
-
BIO
18h 30m1 stop
United Airlines Logo
7:25 am - 2:10 pm
BIO
-
ORD
13h 45m1 stop
$507United Airlines
Fri, Feb 27 - Tue, Mar 3
United Airlines Logo
2:19 pm - 11:20 pm
ORD
-
BIO
26h 01m2 stops
United Airlines Logo
7:25 am - 2:10 pm
BIO
-
ORD
13h 45m1 stop
$511United Airlines
Tue, Feb 24 - Tue, Mar 3
United Airlines Logo
10:00 am - 10:50 am
ORD
-
BIO
17h 50m2 stops
United Airlines Logo
6:45 am - 6:40 pm
BIO
-
ORD
18h 55m2 stops
$536United Airlines
Booking Insights

KAYAK's insights & trends for Chicago to Bilbao flights

Get data-powered insights and trends into flights from Chicago 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 Chicago O'Hare Intl Airport to Bilbao?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Chicago O'Hare Intl Airport 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 Chicago O'Hare Intl Airport to Bilbao is March, where tickets cost $730 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,089 and $1,072 respectively.

Good to know

Low seasonJanuary
Cheapest flight$267
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly and prices are also 3% lower on average.
Flight from Chicago to Bilbao

When to book flights from Chicago to Bilbao

Are your dates flexible? Find out the best times to travel from Chicago 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 Chicago to Bilbao flights

  • What is the cheapest flight from Chicago O'Hare Intl Airport to Bilbao?

    In the last 3 days, the lowest price for a flight from Chicago O'Hare Intl Airport to Bilbao was $267 for a one-way ticket and $453 for a round-trip.

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

    Yes

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

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

  • Which airline alliances offer flights from Chicago to Bilbao?

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

  • Which is the best airline for flights from Chicago to Bilbao, United Airlines or Iberia?

    The two airlines most popular with KAYAK users for flights from Chicago to Bilbao are United Airlines and Iberia. With an average price for the route of $970 and an overall rating of 7.4, United Airlines is the most popular choice. Iberia is also a great choice for the route, with an average price of $821 and an overall rating of 7.0.

  • How does KAYAK find such low prices on flights from Chicago 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 Chicago to Bilbao.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Bilbao from Chicago 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 Chicago 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 Chicago with another airline. Booking your flights between Chicago 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 Chicago 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 Chicago up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Chicago to Bilbao

 
See real verified KAYAK customer reviews for airlines flying from Chicago 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 Chicago 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.
7.4
United AirlinesOverall score based on 9143 reviews
7.1Entertainment
6.6Food
8.1Crew
7.7Boarding
7.3Comfort
Airline reviews

They lost my luggage, so, not happy. The crew was nice but my suitcases never made it, still trying to find out what happened!

6.0 GoodPatricia, Jan 2026
ORD - LAS
Read more United Airlines reviews

They lost my luggage, so, not happy. The crew was nice but my suitcases never made it, still trying to find out what happened!

I understand weather is an issue, but making us chase our plane down at five scheduled gates across three terminals in an airport the size of O'Hare was unfair. They'd have probably been better off to leave gates as TBD until the inbound plane is in final approach instead of running us all over the place. Also, props to the consistently-unprepared ground crew in Richmond for once again leaving my lane parked short of the gate because they couldn't have a crew in place on time with 2 hours notice...

cabin crew was OK, food was OK, the trip from the US to Munich was actually pretty bad comfort wise. Noisy aircraft, lights never dimmed even in Business class (night flight) barely sufficient amenities for the price. I have millions of miles with United but TBH American is gaining ground and Delta has always been marginally better then United although on paper United has more longes and cheaper upgrades.

Essy to get on. The hostess gave very little pop, the plane was late getting in, and we are still waiting for our bags. This sucks. :/

Not United Airlines' fault. It's ORL airport's fault.

Great flight. On time boarding. Smooth flight and on time arrival at EWR. The flight crew was marvelous and there was a great selection of movies on the entertainment system. Our bags were at the carousel before we got there. Another excellent flight from United.

I liked the snacks and the flight attendants were friendly.

The movies offered were great. Staff were very pleasant and very efficient.

After a delay at the gate, C3, at Ohare on Sunday, I left my Blk ski coat on the bench at the gate, lost! Please review my lob claim, thx.

Very nice flight love the small aircraft. We had a wonderful flight attendant. Nice to see someone that really enjoys her job. Don't have her name but had a southern accent.

Bad weather Excelent pilot Spoke British 😆on time seats small ad expected in a discount airline

It wasn’t great because the third-party from Kayak there was just no information about how to check in with Vueling. And the purchase of the ticket from under pricer just made everything really difficult. I’m unlikely to use Kayak again for these reasons.

It was fine, older plane with limited entertainment, otherwise fine.

the seats were bad and uncomfortable and the food was not tasty.

the seats were so cramped you could barely move. it was difficult to eat when passengers would recline their seats. the seats were so flimsy and unstable that whenever someone got in and out of their seat, it bounced like a spring back in your face. the movies were nice. the food was terrible. even though the conditions were terrible, they tried to pressure passengers to relocate their seats to accommodate adults who were related and wanted to sit next to each other, even after the passengers expressed that they did not want to move for that purpose. on the connecting flight, the “service” consisted of items for purchase. even though the flight was only 45 minutes, once again passengers (including me) were pressured to relocate for people to sit next to each other. they couldn’t be apart for 45 minutes? this was much less compelling than being apart for an 8 hour flight.

Everything went smoothly, and we even arrived 40min earlier than scheduled, on an Orland-Madrid route.

It was budget airline Veuling, even though we booked Iberia.

The staff was very nice and helpful. Some of the best crew I have met.

Bad experience. The seat room are very tight. The food is not good and the breakfast has no hot drink.

Suddenly, I don't find my flight back on the app Help Ticket 0757345716866 Hoeflich Flight back Sunday ib5333 Ib2629 Ib4268

I liked Quiet people around me. Crew could have helped people with overhead luggage so they aren't moving other peoples bags around and causing problems for people that had there bags there first

The plane was delayed by two hours in Chicago which led to us missing the next flight. Lufthansa rebooked the flight and booked us a hotel for the night in Frankfurt. The level of customer service and getting us taken care of was superb. The flight crew and the service on the ground was superb.

We were charged for luggage, and our ticket was with Lufthansa and was supposed to include luggage fees. So our experience was a bit bad. Also, the flight was about 45 minutes late arriving.

It was good although we could not land in Munich due to weather and we had to go to Stuttgart. Missed our second flight. They did get us on another flight but the seats where not the ones I paid for in the flight that we missed.

The row of seats were so cramped it was difficult to get in and out of your seat. I even upgraded. A long flight and sad accommodations 😵‍💫 the shorter flight was very comfortable and the seating was spacious

Smooth Flight, Friendly crew, food offering on board was limited.

I have flown with many airlines. My first time was several years ago. Now I remember why I avoided them for so long. Lufthanza is the only airline who has ever raised a size/weight issue with my modest standard size carry on. I had to repack three times to meet their carry-on weight criteria. (Apparently the rules of physics apply differently on Lufthansa flight than on other airlines.) In the meantime their staff was quite rude, repeating meaningless phrases like "Rules are Rules." And ignoring the additional fact that weight is also weight, whether it is in found in your carry on or in your suitcase. They eventually acknowledged that customer service and satisfaction is, for them, a low priority. Never choosing Lufthansa again.

They are professional. Nice crew. Still flying Boeing 747. Thank you for that. I love this airplane. Traditional.

The real bathroom smelled horrible and it smelled in the real of the plane..

The staff are extremely rude maybe even racist, I’ve never been treated so poorly in my life. I will never fly with Lufthansa Mor Discovery Airlines again.

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

Information on your arrival and departure airports