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Bilbao

$274+ Cheap flights from Chicago (CHI) to Bilbao (BIO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — BIO
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
1 adult, Economy
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Cheap 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 June 30, 2025.

Round-trip from

$484
(oojo)

One-way from

$326
(Kiwi.com)

Popular in

April

Cheapest in

January

Average price

$1,135
From Chicago (CHI) to Bilbao
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One-way flight from Chicago (CHI) to Bilbao
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Highest demand for flights based on searches. 32% potential increase in price ($473 potential increase over avg. RT price).
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Cheapest flight prices on average. 16% potential price decrease ($134 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find 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 June 30, 2025.

This oojo deal was found by Cheapflights users on 6/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/96:15 pmORD - BIO
1 stop16h 50mTAP AIR PORTUGAL
Thu 8/2112:15 pmBIO - ORD
1 stop34h 55mTAP AIR PORTUGAL
Deal found 6/29$484
This Trip.com deal was found by Cheapflights users on 6/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/86:00 pmORD - BIO
2 stops17h 55mMultiple Airlines
Tue 10/1410:45 amBIO - ORD
2 stops36h 25mMultiple Airlines
Deal found 6/28$565
This United Airlines deal was found by Cheapflights users on 6/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/89:40 pmORD - BIO
1 stop13h 10mUnited Airlines
Tue 10/146:45 amBIO - ORD
2 stops15h 10mUnited Airlines
Deal found 6/28$591
This American Airlines deal was found by Cheapflights users on 6/29. 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.
Wed 10/81:43 pmORD - BIO
2 stops16h 02mAmerican Airlines
Tue 10/149:15 amBIO - ORD
1 stop12h 00mAmerican Airlines
Deal found 6/29$594
This Gurufare deal was found by Cheapflights users on 6/28. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/19:08 pmORD - BIO
2 stops32h 57mLufthansa
Mon 11/105:30 pmBIO - ORD
1 stop26h 40mLufthansa
Deal found 6/28$647
This Delta deal was found by Cheapflights users on 6/27. 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.
Wed 11/1210:35 amMDW - BIO
2 stops23h 45mDelta
Sun 11/167:20 amBIO - MDW
2 stops40h 03mDelta
Deal found 6/27$682
This FlightHub deal was found by Cheapflights users on 6/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/19:20 pmORD - BIO
1 stop31h 40mTurkish Airlines
Mon 11/1012:00 pmBIO - ORD
1 stop29h 05mTurkish Airlines
Deal found 6/30$684
This KAYAK deal was found by Cheapflights users on 6/30. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/18:34 pmORD - BIO
2 stops34h 16mBritish Airways
Mon 11/109:15 amBIO - ORD
2 stops17h 30mBritish Airways
Deal found 6/30$688
This Delta deal was found by Cheapflights users on 6/29. 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.
Tue 8/1211:05 amORD - BIO
2 stops16h 55mDelta
Tue 8/197:10 amBIO - ORD
1 stop14h 50mDelta
Deal found 6/29$690
This Booking.com deal was found by Cheapflights users on 6/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1610:40 amORD - BIO
2 stops24h 10mAir Canada
Sun 10/266:40 amBIO - ORD
2 stops32h 33mAir Canada
Deal found 6/29$698
This SWISS deal was found by Cheapflights users on 6/28. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/122:20 pmORD - BIO
2 stops16h 00mSWISS
Tue 8/199:00 pmBIO - ORD
1 stop22h 10mSWISS
Deal found 6/28$708
This Air France deal was found by Cheapflights users on 6/28. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/121:05 pmMDW - BIO
2 stops21h 15mAir France
Sun 11/167:20 amBIO - MDW
2 stops45h 24mAir France
Deal found 6/28$735

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 June 30, 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

Sat 8/9

6:15 pm-6:05 pm

1 stop16h 50m

Bilbao

Thu 8/21

12:15 pm-4:10 pm

1 stop34h 55m

$484

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Wed 10/8

6:00 pm-6:55 pm

2 stops17h 55m

Bilbao

Tue 10/14

10:45 am-4:10 pm

2 stops36h 25m

$565

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Wed 10/8

9:40 pm-5:50 pm

1 stop13h 10m

Bilbao

Tue 10/14

6:45 am-2:55 pm

2 stops15h 10m

$591

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Wed 10/8

1:43 pm-12:45 pm

2 stops16h 02m

Bilbao

Tue 10/14

9:15 am-2:15 pm

1 stop12h 00m

$594

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Sat 11/1

9:08 pm-12:05 pm

2 stops32h 57m

Bilbao

Mon 11/10

5:30 pm-1:10 pm

1 stop26h 40m

$647

ChicagoBilbao

MDW - BIO

MDWBIO

Chicago Midway

Wed 11/12

10:35 am-5:20 pm

2 stops23h 45m

Bilbao

Sun 11/16

7:20 am-4:23 pm

2 stops40h 03m

$682

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Sat 11/1

9:20 pm-11:00 am

1 stop31h 40m

Bilbao

Mon 11/10

12:00 pm-10:05 am

1 stop29h 05m

$684

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Sat 11/1

8:34 pm-12:50 pm

2 stops34h 16m

Bilbao

Mon 11/10

9:15 am-7:45 pm

2 stops17h 30m

$688

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Tue 8/12

11:05 am-11:00 am

2 stops16h 55m

Bilbao

Tue 8/19

7:10 am-3:00 pm

1 stop14h 50m

$690

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Thu 10/16

10:40 am-5:50 pm

2 stops24h 10m

Bilbao

Sun 10/26

6:40 am-9:13 am

2 stops32h 33m

$698

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 18 results
1
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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, January is the cheapest month in which you can book a flight from Chicago to Bilbao (average of $541). Flying from Chicago to Bilbao in June is currently the most expensive (average of $1,149). 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 June 30, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 41% on flights from Chicago to Bilbao by exploring options for tickets in the morning.

How much does it cost to fly round-trip from Chicago to Bilbao?

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 June 30, 2025.
See what other customers who have flown with Delta, Air France, and SWISS 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.
Delta
8.0
Very good
7,969 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,969 reviews
Delta
8.0
Very good
7,969 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,471 reviews
Delta
8.0
Very good
7,969 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,653 reviews
Delta
8.0
Very good
7,969 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,852 reviews
Delta
8.0
Very good
7,969 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,969 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 4 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.

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

    Cheapflights users have booked flights from Chicago to Bilbao round-trip from $484. Other airlines that can offer you cheap pricing are American Airlines, from $670, and United Airlines, from $675. TAP AIR PORTUGAL is 50% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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, January is the cheapest month in which you can book a flight from Chicago to Bilbao (average of $541). Flying from Chicago to Bilbao in June is currently the most expensive (average of $1,149). 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
St. Louis to Bilbao flights
Midway to Bilbao flights
St. Louis to San Sebastian flights

Top 4 airlines flying from Chicago to Bilbao

Discover the top 4 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 June 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$567Average$927FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$639Average$970FlexibilityNo cancel feeOn-time69%
IberiaCheapest$640Average$918FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$646Average$936FlexibilityNo cancel feeOn-time76%

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