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$450+ Cheap flights from Chicago (CHI) to Bilbao (BIO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — BIO
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap flight deals from Chicago to Bilbao

Cheapest flights from Chicago to Bilbao
Explore the most affordable flight options available from Chicago to Bilbao. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

This Delta deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/285:20 pmORD - BIO
1 stop17h 00mDelta
Thu 1/17:25 amBIO - ORD
1 stop14h 45mDelta
Deal found 12/14$1,544
This Delta deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/286:08 pmMDW - BIO
2 stops16h 12mDelta
Thu 1/16:50 amBIO - MDW
2 stops17h 36mDelta
Deal found 12/14$1,794
This American Airlines deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/281:10 pmORD - BIO
2 stops16h 40mAmerican Airlines
Thu 1/19:15 amBIO - ORD
2 stops18h 22mAmerican Airlines
Deal found 12/14$2,265

Find flight deals from Chicago to Bilbao

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Bilbao (BIO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$450
(lol.travel)
Provider with most accurate pricing for Chicago (CHI)-Bilbao flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Bilbao flights.
Search Deals
From Chicago (CHI) to Bilbao
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Chicago to Bilbao that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 15, 2025.
Use the filters below to find and compare flights from Chicago to Bilbao that are best for you.

Fly from

Chicago

Fly to

Bilbao

Route

Depart

Return

Price

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Thu 1/15

7:20 pm-6:40 pm

1 stop16h 20m

Bilbao

Mon 1/19

7:30 pm-10:29 pm

2 stops33h 59m

$495

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Sun 2/8

6:30 pm-6:15 pm

2 stops16h 45m

Bilbao

Tue 2/24

7:10 am-5:20 pm

2 stops17h 10m

$508

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Wed 3/11

10:50 pm-9:55 pm

1 stop17h 05m

Bilbao

Wed 3/18

7:25 am-3:10 pm

1 stop13h 45m

$546

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Tue 3/24

9:20 pm-4:10 pm

1 stop36h 50m

Bilbao

Tue 4/7

11:55 am-6:15 pm

1 stop37h 20m

$555

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Wed 3/11

12:50 pm-4:10 pm

1 stop21h 20m

Bilbao

Wed 3/18

5:10 pm-11:05 am

1 stop23h 55m

$555

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Wed 3/11

10:50 pm-9:55 pm

1 stop17h 05m

Bilbao

Wed 3/18

12:50 pm-9:05 pm

1 stop14h 15m

$571

ChicagoBilbao

MDW - BIO

MDWBIO

Chicago Midway

Sun 2/8

1:26 pm-11:30 am

2 stops15h 04m

Bilbao

Tue 2/24

6:50 am-6:37 pm

2 stops18h 47m

$585

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Wed 3/11

1:56 pm-11:30 am

2 stops15h 34m

Bilbao

Wed 3/18

6:50 am-10:01 pm

2 stops21h 11m

$585

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Sat 4/25

7:15 pm-11:35 am

1 stop33h 20m

Bilbao

Sun 5/17

9:25 pm-4:10 pm

1 stop25h 45m

$586

ChicagoBilbao

MDW - BIO

MDWBIO

Chicago Midway

Wed 3/11

1:09 pm-11:30 am

2 stops16h 21m

Bilbao

Wed 3/18

7:25 am-5:55 pm

2 stops16h 30m

$591

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/13

Showing 1-10 of 21 results
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Compare providers for flights from Chicago to Bilbao

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Chicago to Bilbao in December.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Chicago-Bilbao flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Chicago-Bilbao flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Chicago-Bilbao flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago-Bilbao flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago-Bilbao flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Chicago to Bilbao

Have a flexible travel schedule? Discover the best time to fly to Bilbao from Chicago with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Chicago to Bilbao?

Currently, August is the cheapest month in which you can book a flight from Chicago to Bilbao (average of $547). Flying from Chicago to Bilbao in December is currently the most expensive (average of $866). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CHI to BIO?

Find hourly flight availability from Chicago to Bilbao. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 15, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 57% on flights from Chicago to Bilbao by exploring options for tickets in the morning.

Reviews of airlines servicing Bilbao

Get insights into the airlines that provide service to Bilbao. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Bilbao. Reviews last updated December 15, 2025.
See what other customers who have flown with United Airlines and Lufthansa from Chicago to Bilbao have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,092 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,092 reviews
United Airlines
7.4
Good
9,092 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Lufthansa
6.8
Okay
7,628 reviews
United Airlines
7.4
Good
9,092 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

Related info for your journey

Find useful and relevant information for your journey from Chicago to Bilbao. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Bilbao from Chicago?

    Bilbao (BIO) is the airport you will fly into if you book a flight from Chicago to Bilbao. You should not have trouble finding flights to Bilbao from Chicago; the airport handles an average of 0 inbound flights from Chicago per day. You should also have plenty of airline options to choose from since 3 airlines have flights to the Bilbao airport from Chicago. It is only a 3.0 mi journey from Bilbao (BIO) to Bilbao’s city center.

  • How long is the flight from Chicago to Bilbao?

    Airlines like Scandinavian Airlines, Lufthansa, and Turkish Airlines fly from Chicago to Bilbao in about 16h 20m. The time it takes to get you to your destination can typically vary by up to 20h 30m. Chicago and Bilbao are separated by a distance of 4116 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Chicago to Bilbao round-trip?

    Cheapflights users have booked flights from Chicago to Bilbao round-trip from $575. Other airlines that can offer you cheap pricing are Iberia, from $612, and United Airlines, from $699.

  • Can I find deals for flights from Chicago to Bilbao that include hotel bookings?

    Yes. In addition to deals on Chicago to Bilbao flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Chicago to Bilbao?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Bilbao.

  • Can I find deals for business class flights from Chicago to Bilbao?

    Yes. Cheapflights offers flight deals from Chicago to Bilbao by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Chicago to Bilbao?

    Currently, August is the cheapest month in which you can book a flight from Chicago to Bilbao (average of $547). Flying from Chicago to Bilbao in December is currently the most expensive (average of $866). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Chicago to Bilbao

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to San Sebastian flights
O'Hare Intl to Bilbao flights
Midway to Bilbao flights
St. Louis to Bilbao flights
St. Louis to San Sebastian flights

Top 3 airlines flying from Chicago to Bilbao

Discover the top 3 airlines that operate flights from Chicago to Bilbao. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$575Average$862FlexibilityNo cancel feeOn-time76%
IberiaCheapest$612Average$864FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$699Average$901FlexibilityNo cancel feeOn-time69%

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