ORD - BIO

$233 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 10/24. 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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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

Sat, Nov 1 - Mon, Nov 10
Lufthansa Logo
9:08 pm - 12:00 pmORD-BIO
32h 52m2 stops
Lufthansa Logo
6:50 pm - 6:25 pmBIO-ORD
30h 35m1 stop
$547Lufthansa
Find Deal
Sat, Oct 11 - Sat, Oct 18
Multiple Airlines Logo
6:20 pm - 1:25 pmORD-BIO
36h 05m2 stops
Multiple Airlines Logo
6:35 pm - 12:30 pmBIO-ORD
24h 55m1 stop
$571Multiple Airlines
Find Deal
Fri, Dec 26 - Sat, Jan 17
United Airlines Logo
10:35 pm - 11:20 pmORD-BIO
17h 45m1 stop
United Airlines Logo
7:25 am - 2:10 pmBIO-ORD
13h 45m1 stop
$597United Airlines
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Mon, Nov 24 - Sun, Nov 30
United Airlines Logo
9:50 pm - 11:05 pmORD-BIO
18h 15m1 stop
United Airlines Logo
12:45 pm - 1:10 pmBIO-ORD
31h 25m1 stop
$616United Airlines
Find Deal
Sat, Nov 1 - Mon, Nov 10
Turkish Airlines Logo
9:20 pm - 11:00 amORD-BIO
31h 40m1 stop
Turkish Airlines Logo
12:00 pm - 10:05 amBIO-ORD
29h 05m1 stop
$634Turkish Airlines
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Mon, Nov 24 - Sun, Nov 30
Air Canada Logo
2:00 pm - 12:05 pmORD-BIO
15h 05m2 stops
Air Canada Logo
12:45 pm - 3:10 pmBIO-ORD
57h 25m2 stops
$651Air Canada
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Fri, Dec 26 - Sat, Jan 17
Air Canada Logo
6:16 pm - 12:00 pmORD-BIO
34h 44m2 stops
Air Canada Logo
12:50 pm - 9:13 amBIO-ORD
27h 23m2 stops
$660Air Canada
Find Deal
Thu, Nov 20 - Sun, Nov 30
Turkish Airlines Logo
11:50 am - 11:00 amORD-BIO
16h 10m1 stop
Turkish Airlines Logo
5:10 pm - 10:05 amBIO-ORD
23h 55m1 stop
$720Turkish Airlines
Find Deal
Thu, Dec 11 - Fri, Jan 2
Scandinavian Airlines Logo
7:10 am - 6:40 pmORD-BIO
28h 30m2 stops
Scandinavian Airlines Logo
7:30 pm - 4:45 pmBIO-ORD
28h 15m1 stop
$1,009Scandinavian Airlines
Find Deal
Thu, Dec 11 - Fri, Jan 2
Scandinavian Airlines Logo
7:20 pm - 6:40 pmORD-BIO
16h 20m1 stop
Scandinavian Airlines Logo
7:30 pm - 4:45 pmBIO-ORD
28h 15m1 stop
$1,043Scandinavian Airlines
Find Deal

Everything you should know

Top airlines
Lufthansa
Cheapest • from $547 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
February
Cheapest • 22% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$547
Overall average: $832
Lufthansa
Sat 11/1Mon 11/10
ORD - BIO • 2 stops
Cheapest one-way
$233
Multiple Airlines
Fri 10/24
ORD - BIO • 2 stops
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We hope you love your trip to Bilbao!
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 February, where tickets cost $678 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,096 and $1,072 respectively.

Good to know

Low seasonJanuary
Cheapest flight$233
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 12% 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 $233 for a one-way ticket and $547 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, 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 $885 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 $892 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 8929 reviews
6.6Food
7.3Comfort
7.1Entertainment
7.7Boarding
8.1Crew
Airline reviews

Once we got in the air the pilot made up some of the time of the delay. So that was really nice.

10.0 ExcellentAnonymous, Aug 2025ORD - MEM
Read more United Airlines reviews

Once we got in the air the pilot made up some of the time of the delay. So that was really nice.

We had a layover from YVR to Denver. We bought 4 bottles of Absolut Vodka at the YVR Duty Free for $116.20, after going through security and American Customs Pre Clearance at YVR, Vancouver. When we landed in Denver, United put us behind the American Customs as well as TSA again for some reason. We were forced to go through American Customs and TSA again. TSA confiscated our rightfully owned Duty Free Absolut Vodka bottles. Because United incorrectly forced our flight behind American border and TSA again, we missed the connecting flight. After United put us on a later flight, we eventually arrived in Chicago very late, with hardly any sleep. I am looking for compensation from United for our incorrectly confiscated Absolut Vodka bottles worth $116.20, as well as compensation for incorrectly putting us behind American Customs and TSA again, causing us to miss our connecting flight, making us arrive extremely late in Chicago.

Excellent flight. Boarding was efficient and departure was on time. Smooth flight with on time arrival. Deplaning was also efficient.

It was delayed instead of departing at 9:20pm, we departed at 11pm… putting us in Columbus after 2am! It was awful. Had I known about the delay, I could have spent some time in the United Lounge… I was starving because I started my journey in Budapest… so I was exhausted and hungry. Plus I had to make new arrangements to be picked up at the airport in Columbus, instead of midnight it was 2:30 am after getting luggage and out of airport. Not feasible. I would have just stayed in Chicago for the night and gotten a morning flight.

It was great, I’m very grateful for the pilots and crew flight attendants for everything.

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!

This is where i leave an airline review. Test test test!

We liked the flight but while we purchased an aisle seat, our seats had a different configuration on this flight. A fellow passenger suggested that the airplane had been changed. Too bad we were not informed and had no chance to modify our seat preferences. We were stuck in the window and middle seats with no chance to walk around and go to the bathroom without disturbing our sleeping fellow passenger.

Boarding an international flight via several sets of stairs and shuttle busses to the tarmac even when multiple jet-bridges were empty at Madrid airport (the hub for Iberia) was not pleasant. I was fine, but a lot of elderly folks and families with kids were struggling. A bad way to start a flight. Business class seats were nice, although not cleaned well from the prior flight.

This was a short flight. We sat in business class so we we were served a warm meal, which was nice. The flight attendants were very attentive, professional, and kind.

The flight was great; I don't see any area of improvement.

The crew were not very personable. The crew did not serve tea or coffee. The bathroom was not kept clean. Two out of the 5 toilets in the cabin weren't working.

Delayed first flight Geneva Madrid.. We didn’t miss our 2nd flight only because the 2nd flight Madrid Dallas was 1h delayed. However we did end up missing the 3rd leg Dallas Austin. Luggage didn’t show up in Dallas. So we re missing 2 suit cases. Customer service sent us to a hotel in Dallas. Only one room booked for 5!! Pretty bad experience overall. I won’t book a flight on Iberia in the future

Crew was excellent, great customer service, checked luggage took 1 hour and a half to come out at the baggage claim, the only negative thing about the flight.

It was extremely cold in the back of the plane. The seats are uncomfortable and space very small. Crew was excellent as usual.

Horrible experience airline crew was unprofessional. Flight was delayed. Suit cases did not arrive. Never flying iberia again

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 flight and crew were good. The customer experience on the ground could have been better. We had to reschedule our flight because of a delay on the previous flight. The attendants working the desk in Washington DC were not helpful. They told us to scan a QR code and that would get us rebooked. Why couldn't two people standing at their computers do this? We had to chat with someone to get everything figured out. It was extremely confusing.

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.

It was a short flight, everything was good with it.

Flight was delayed over one hour and I had to pay to select my seat, even though my booking supposedly had free selection (I paid extra for this at time of booking)

Stop charging for alcohol overseas flights and start taking cash again not everyone wants to pay with card if the person is bigger give him seat on the outside seats not the middle in between the people is common sense and mainly if you fly for Lufthansa provides the sam service and experience...

good entertainment package but rather small seats for business class

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

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

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