ORD - BIO

$566 Find Cheap Flights from Chicago to Bilbao

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Chicago to Bilbao departing on 4/6. 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
$566
Overall average: $739
Turkish Airlines
Mon 4/6Tue 4/21
ORD - BIO • 1 stop
Cheapest one-way
Multiple Airlines
Mon 11/17
ORD - BIO • multi-stop
Top airlines
Turkish Airlines
Cheapest • from $566 (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 • 21% 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

Mon, Apr 6 - Tue, Apr 21
Turkish Airlines Logo
7:50 pm - 5:20 pmORD-BIO
38h 30m1 stop
Turkish Airlines Logo
11:55 am - 9:40 amBIO-ORD
28h 45m1 stop
$566Turkish Airlines
Find Deal
Thu, Mar 19 - Sun, Mar 29
Turkish Airlines Logo
12:50 pm - 11:00 amORD-BIO
16h 10m1 stop
Turkish Airlines Logo
6:20 pm - 9:40 amBIO-ORD
22h 20m1 stop
$624Turkish Airlines
Find Deal
Fri, Apr 3 - Tue, Apr 7
Turkish Airlines Logo
11:25 am - 10:55 amORD-BIO
16h 30m1 stop
Turkish Airlines Logo
11:55 am - 9:40 amBIO-ORD
28h 45m1 stop
$650Turkish Airlines
Find Deal
Sun, Dec 7 - Sat, Dec 13
Multiple Airlines Logo
12:50 pm - 11:45 amORD-BIO
15h 55m2 stops
Multiple Airlines Logo
9:05 pm - 1:10 pmBIO-ORD
23h 05m2 stops
$654Multiple Airlines
Find Deal
Sun, Dec 7 - Sat, Dec 13
Multiple Airlines Logo
3:50 pm - 10:55 pmORD-BIO
24h 05m2 stops
Multiple Airlines Logo
7:10 am - 5:55 pmBIO-ORD
17h 45m2 stops
$658Multiple Airlines
Find Deal
Fri, Mar 20 - Sun, Mar 29
Turkish Airlines Logo
12:50 pm - 11:00 amORD-BIO
16h 10m1 stop
Turkish Airlines Logo
6:20 pm - 9:40 amBIO-ORD
22h 20m1 stop
$666Turkish Airlines
Find Deal
Mon, Apr 6 - Tue, Apr 21
Multiple Airlines Logo
7:50 pm - 5:20 pmORD-BIO
38h 30m1 stop
Multiple Airlines Logo
1:10 pm - 9:40 amBIO-ORD
27h 30m2 stops
$671Multiple Airlines
Find Deal
Sun, Dec 7 - Sat, Dec 13
Multiple Airlines Logo
3:50 pm - 10:55 pmORD-BIO
24h 05m2 stops
Multiple Airlines Logo
9:20 pm - 5:55 pmBIO-ORD
27h 35m3 stops
$675Multiple Airlines
Find Deal
Thu, Mar 19 - Sun, Mar 29
Multiple Airlines Logo
12:50 pm - 4:40 pmORD-BIO
21h 50m2 stops
Multiple Airlines Logo
6:35 pm - 6:15 pmBIO-ORD
30h 40m1 stop
$685Multiple Airlines
Find Deal
Sun, Dec 7 - Sat, Dec 13
Multiple Airlines Logo
12:50 pm - 11:45 amORD-BIO
15h 55m2 stops
Multiple Airlines Logo
8:30 am - 8:01 amBIO-ORD
30h 31m3 stops
$687Multiple Airlines
Find Deal
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 $1,092 and $1,025 respectively.

Good to know

Low seasonJanuary
Cheapest flight$566
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 1% 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 $566 for a round-trip ticket.

  • 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 $887 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 $864 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 9014 reviews
7.7Boarding
7.1Entertainment
7.3Comfort
8.1Crew
6.6Food
Airline reviews

Seats in waiting area and on plane hard as rock. Fast internet on the flight was great! Crew was kind.

10.0 ExcellentClaire, Nov 2025ORD - YOW
Read more United Airlines reviews

Seats in waiting area and on plane hard as rock. Fast internet on the flight was great! Crew was kind.

Always wish for more healthy, gluten free options. We have to bring our own.

Having a long layover, I was very appreciative of the ability to stand by for an earlier flight. Other airlines like Delta have refused this to me in the past, just to be mean (because my ticket class wasn't high enough). United went out of their way to help me get to my destination early, which I really appreciated given that it was the third leg of a 24+ hour journey for me.

Other than a way way too cold cabinets for the entire flight, all was great

One bag is incorrect and not acceptable for an international flight. The food was not just good. I won't fly with them again.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

Not the fault of United—weather, reroute around weather, time sitting on tarmac, arrived couple hours late, too late for train into city necessitating a much pricier cab but weather…can’t be helped.

I will never book a flight through Cheap fare. They booked me from Portland Main . And would not give me a refund, so I bought 2 tickets one for 299. From Portland Main to ORD. Then I had to buy a ticket from Oregon PDX to ORD that was another 440. So Just so you know they even told me it was there fault but no refund. Bad bussniess. I did inform United but they said they couldn't help me due to the fact I booked through Cheap Tickets. Never again. And I'm spreding the word. I let everyone know at my 50th class reunion

The flight attendants were rude. Seemed like they didn’t want to be there. Except for one girl that was really nice. Seats are sooooo uncomfortable. They give you a piece of paper and a thin cushion for a pillow and blanket that does nothing. Airlines have gone way downhill, especially United international flights. Food was disguting. Definitely flying ANA next time.

Crew and customer service were excellent. This flight also had plenty of leg room and seat mounted screens for entertainment. A very pleasant flight all around!

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

Great : The crew was awesome ♥️ To improve : - The rice in the "Rice with chicken" was rather s kind of rice pudding, not good at all - No power outlet to charge your phone. 😒

It was a good flight overall. Nothing to add. Keep it up!

Excellent. Thanks to United Star Alliance, since economy was overbooked, I’m grateful to have been upgraded to Business Class.

Good plane, excellent food, crew and entertainment. Seats in business could use an upgrade

Delayed. Mismanagement of gate lines. Passengers arguing with eachother as a result of lack of organization by airline. Avoid this airline.

Disaster. Downgraded. Zero apology. No effort or coordination between gate and crew. Awful seat blocked by door emergency slide box. Iberia is a mess. App never works. Avoid this airline.

We departed late but made up most of the time in flight. Our ticket was pure economy, so it wasn’t anything fancy; however, I heard that we arrived in Madrid at the exact same time that First Class passengers arrived! Overall, our experience was similar to what we had on other American Airlines transatlantic flights - good value at a reasonable price. We were even able to get our carry-on baggage onto the plane without needing to gate check it.

Flight was OK. Waiting for luggage in Madrid for 55 minutes, unacceptable

Trip was smooth, good drew, average meal, almost cold coffee. Excellent landing. Did not enjoy going down the stairs, walking to the gate, walking up the stairs, going a long walk to the exchange gate, and going down the stairs again to be bussed all the way where we originally landed to take our next flight! Over all an average experience. Thank you.

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..

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

Information on your arrival and departure airports