ORD - BIO

$306 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 7/7. 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 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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Flights 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

Sat, Oct 11 - Sun, Oct 19
Turkish Airlines Logo
11:45 pm - 11:05 amORD-BIO
28h 20m1 stop
Turkish Airlines Logo
6:30 pm - 10:00 pmBIO-ORD
34h 30m1 stop
$611Turkish Airlines
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Sat, Oct 11 - Sun, Oct 19
 Logo
8:40 am - 11:55 amORD-BIO
20h 15m2 stops
 Logo
8:20 am - 9:51 amBIO-ORD
32h 31m2 stops
Wed, Nov 26 - Sat, Dec 6
Lufthansa Logo
9:50 pm - 11:05 pmORD-BIO
18h 15m1 stop
Lufthansa Logo
6:40 am - 8:05 pmBIO-ORD
20h 25m1 stop
$640Lufthansa
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Wed, Nov 26 - Sat, Dec 6
United Airlines Logo
11:20 am - 12:05 pmORD-BIO
17h 45m2 stops
United Airlines Logo
12:50 pm - 8:05 pmBIO-ORD
14h 15m1 stop
$644United Airlines
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Sat, Nov 1 - Mon, Nov 10
Lufthansa Logo
9:08 pm - 12:05 pmORD-BIO
32h 57m2 stops
Lufthansa Logo
5:30 pm - 1:10 pmBIO-ORD
26h 40m1 stop
$646Lufthansa
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Wed, Nov 26 - Sat, Dec 6
United Airlines Logo
1:00 pm - 6:05 pmORD-BIO
22h 05m2 stops
United Airlines Logo
12:50 pm - 7:32 pmBIO-ORD
37h 42m2 stops
$651United Airlines
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Fri, Sep 19 - Sat, Sep 27
Iberia Logo
4:30 pm - 4:55 pmORD-BIO
17h 25m1 stop
Iberia Logo
5:35 pm - 2:15 pmBIO-ORD
27h 40m1 stop
$699Iberia
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Fri, Sep 19 - Sat, Sep 27
Iberia Logo
1:59 pm - 12:45 pmORD-BIO
15h 46m2 stops
Iberia Logo
5:35 pm - 2:15 pmBIO-ORD
27h 40m1 stop
$704Iberia
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Tue, Jul 29 - Tue, Aug 5
KLM Logo
2:00 pm - 11:15 amORD-BIO
14h 15m2 stops
KLM Logo
12:00 pm - 2:40 pmBIO-ORD
33h 40m1 stop
$896KLM
Find Deal
Fri, Jul 25 - Sat, Aug 2
KLM Logo
5:10 pm - 10:00 pmORD-BIO
21h 50m1 stop
KLM Logo
5:15 pm - 2:10 pmBIO-ORD
27h 55m1 stop
$1,176KLM
Find Deal
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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 February, where tickets cost $678 (return) on average. On the other hand, the most expensive months are July and June, where the average cost of round-trip tickets is $1,147 and $1,115 respectively.

Good to know

Low seasonNovember
High seasonMay
Cheapest flight$306
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly with an average 11% increase in price.
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 $306 for a one-way ticket and $611 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?

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

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

    The two airlines most popular with KAYAK users for flights from Chicago to Bilbao are KLM and United Airlines. With an average price for the route of $927 and an overall rating of 7.8, KLM is the most popular choice. United Airlines is also a great choice for the route, with an average price of $1,041 and an overall rating of 7.4.

  • 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.

Top 4 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.
7.8
KLMOverall score based on 1361 reviews
7.7Comfort
7.2Food
8.4Crew
7.1Entertainment
7.8Boarding
Airline reviews

Klm start boarding while somw air issue in the plan

8.0 ExcellentA, Jun 2025AMS - YYZ
Read more KLM reviews

Klm start boarding while somw air issue in the plan

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

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.

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

They only had vegetarian food left on the flight which I wasn’t happy about. I didn’t get any food to eat at all.

Great boarding, great short flight but no entertainment whatsoever. It was supposed to have wifi but that did not work.

Transfer at CDG to connecting KLM flight to Amsterdam was a NIGHTMARE. LONG WALKWAYS, NO MOVING WALKWAYS, POOR signage, Have to take a train & No staff visible to help navigate the maze. AVOID TRANSFER AT CDG AT ALL COST.

Evidently, my seat had the only broken TV. I couldn’t plug it in, get it to come on, or watch anything, and of course, no one could fix it while we were on the plane. The service was good and the boarding was quick

The boarding of took of late.The presentation of the food was horrable as was the tast of the food was cold and tastless.

Delay and keep changing gates. I have to run around from B to C then to E.

I was charged for my daughters bag when I am supposed to receive two free checked bags with my United Explorer card.

The schedule to Moline changed 5 times. The gate changed 6 times. That is a pathetic way to run an airline. No wonder that no one in our company flies on United Express to or from Moline. Changes happen most of the time. I learned my lesson on this trip…never again!

Flight was great. Efficient boarding. Short flight. Early arrival. Friendly flight crew. The entertainment system did not work well. Could not access it until the aircraft reached 10K feet or more. Lots of glitches.

A bit rush for transit. Food and entertainment are not available

Boarding was a little difficult. The gate area at O'Hare was very small and crowded due to multiple gates in the area. Could not hear the intercom, so had to rely on signage to see when my group was boarding and the signage was blocked by passengers standing in the gate. Flight was great and we arrived in Montreal on time.

Smooth boarding process. Early departure, smooth flight, early arrival. The entertainment package has very good recent movie options. The flight crew were friendly and professional.

I do prefer to fly United and have always had excellent service, except for bad weather. Flights are on time and staff is alway curtious and helpful

Not having to check carry on bags when plane wasn’t full. (The told us it was)

Service and food were excellent, could have been more info in English.

I was in business class for the 8 hour flight where: 1. The WiFi did not work 2. The entertainment system did not work 3. We were told there were no hot drinks for the entire flight

I had an issue with the name on my ticket vs my passport name. I was very upset that the Iberia ticket clerk had no authorization to help me and I was left to fix it. It took 19 calls of persons promising to accomplish and not doing anything before I reached someone who helped me in 10 minutes. Two of them even hung up on me. I missed my original flight because of this. Terrible customer service.

Flight boarded three hours late for no reason other than someone made a huge error in crew scheduling. We missed our connecting flight in Madrid and got zero help from American or Iberian airlines on rebooking. We had to pay for a car to take us to the Madrid train station and pay for train tickets to Santiago. We never used our booked flight to Santiago. American claims I can submit the expenses but they are not obligated to cover them. Very frustrating.

Flight delayed Service could be better Iberia staff are not really friendly

They cancelled the flight)(they said bad weather but many other flights took off) and made us wait 5 hours in line to figure out what to do. We ended up making a new flight the next day on another airlines...I hope they honor giving us our money back

Flight from Costa Rica to Madrid was excellent. Good food and service. The flight from Madrid to Brussels was very poor . No food , no entertainment, no usb … Total package was quite expensive so you should give same service on the second flight

We travelled with Level, which is a subsidiary of Iberia. They mixed up all our seats, downgraded few from premium economy fo economy. The crew were not professional, they seem to be in a rush! Also some with an attitude

Paid for “extra room” selected seat. Wasn’t a benefit. Also was in aisle and was bumped almost every time attendants walked down aisle. Should have saved the assigned seat money and let them select.

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.

Flight was 1.5 hours late to depart so changed flights to Swiss Air.

The United Airlines crew that operated this flight was subpar. They didn’t

Very small and uncomfortable seats, Hard to hear entertainment system sound. Horrible food. Staff doesn't care much about the passengers. 2nd time they didn't give me my vegetarian meal. They asked me regular food with meat. The airline and staff was from United airlines.

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.

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