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Bilbao

$277+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — BIO
ago. 19 — ago. 261
mar. 8/19
mar. 8/26
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 agosto 14, 2025.

Round-trip from

$478
(FlightHub)

One-way from

$277
(Mytrip)

Popular in

April

Cheapest in

January
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. 29% potential increase in price ($404 potential increase over avg. RT price).
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Cheapest flight prices on average. 17% potential price decrease ($148 potential savings vs. average RT price).
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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 agosto 14, 2025.

This FlightHub deal was found by Cheapflights users on 8/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/28:25 pmORD - BIO
1 stop15h 10mTAP AIR PORTUGAL
sáb. 11/1512:10 pmBIO - ORD
1 stop33h 50mTAP AIR PORTUGAL
Deal found 8/14$478
This KAYAK deal was found by Cheapflights users on 8/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/308:50 pmORD - BIO
1 stop16h 50mScandinavian Airlines
vie. 11/147:30 pmBIO - ORD
1 stop28h 15mScandinavian Airlines
Deal found 8/14$506
This FlightHub deal was found by Cheapflights users on 8/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/27:20 pmORD - BIO
1 stop16h 20mScandinavian Airlines
vie. 11/147:30 pmBIO - ORD
1 stop28h 15mScandinavian Airlines
Deal found 8/14$511
This Mytrip deal was found by Cheapflights users on 8/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/2310:40 amORD - BIO
2 stops22h 20mMultiple Airlines
mar. 9/3012:45 pmBIO - ORD
2 stops34h 10mMultiple Airlines
Deal found 8/11$542
This lol.travel deal was found by Cheapflights users on 8/13. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/69:40 pmORD - BIO
1 stop13h 10mUnited Airlines
mar. 10/212:10 pmBIO - ORD
1 stop12h 45mUnited Airlines
Deal found 8/13$556
This Mytrip deal was found by Cheapflights users on 8/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/68:40 amORD - BIO
2 stops22h 20mMultiple Airlines
mar. 10/217:00 amBIO - ORD
2 stops33h 51mMultiple Airlines
Deal found 8/13$571
This Iberia deal was found by Cheapflights users on 8/14. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/34:45 pmORD - BIO
1 stop13h 05mIberia
jue. 11/139:15 amBIO - ORD
1 stop12h 15mIberia
Deal found 8/14$590
This United Airlines deal was found by Cheapflights users on 8/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/29:50 pmORD - BIO
1 stop13h 15mUnited Airlines
vie. 11/146:45 amBIO - ORD
2 stops17h 07mUnited Airlines
Deal found 8/14$597
This United Airlines deal was found by Cheapflights users on 8/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/210:55 amORD - BIO
2 stops18h 05mUnited Airlines
jue. 11/136:45 amBIO - ORD
1 stop13h 25mUnited Airlines
Deal found 8/14$599
This Delta deal was found by Cheapflights users on 8/14. 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.
vie. 10/316:35 pmMDW - BIO
2 stops16h 45mDelta
vie. 11/147:25 amBIO - MDW
2 stops18h 11mDelta
Deal found 8/14$680
This Delta deal was found by Cheapflights users on 8/13. 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.
mié. 11/121:05 pmMDW - BIO
2 stops15h 25mDelta
dom. 11/167:25 amBIO - MDW
2 stops45h 19mDelta
Deal found 8/13$692
This Air France deal was found by Cheapflights users on 8/13. 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.
lun. 10/612:48 pmMDW - BIO
2 stops14h 37mMultiple Airlines
mar. 10/216:50 amBIO - MDW
2 stops16h 19mMultiple Airlines
Deal found 8/13$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 agosto 14, 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

dom. 11/2

8:25 pm-6:35 pm

1 stop15h 10m

Bilbao

sáb. 11/15

12:10 pm-3:00 pm

1 stop33h 50m

$478

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

jue. 10/30

8:50 pm-7:40 pm

1 stop16h 50m

Bilbao

vie. 11/14

7:30 pm-4:45 pm

1 stop28h 15m

$506

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

dom. 11/2

7:20 pm-6:40 pm

1 stop16h 20m

Bilbao

vie. 11/14

7:30 pm-4:45 pm

1 stop28h 15m

$511

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

mar. 9/23

10:40 am-4:00 pm

2 stops22h 20m

Bilbao

mar. 9/30

12:45 pm-3:55 pm

2 stops34h 10m

$542

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

lun. 10/6

9:40 pm-5:50 pm

1 stop13h 10m

Bilbao

mar. 10/21

2:10 pm-7:55 pm

1 stop12h 45m

$556

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

lun. 10/6

8:40 am-2:00 pm

2 stops22h 20m

Bilbao

mar. 10/21

7:00 am-9:51 am

2 stops33h 51m

$571

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

mar. 1/13

11:50 am-4:10 pm

1 stop21h 20m

Bilbao

mar. 1/20

12:00 pm-10:05 am

1 stop29h 05m

$573

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

mar. 9/23

2:20 pm-10:45 am

1 stop13h 25m

Bilbao

mar. 9/30

6:45 am-2:55 pm

2 stops15h 10m

$573

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

lun. 11/3

4:45 pm-4:55 pm

1 stop17h 10m

Bilbao

vie. 11/14

6:45 am-2:30 pm

1 stop14h 45m

$590

ChicagoBilbao

MDW - BIO

MDWBIO

Chicago Midway

mié. 1/14

9:20 am-11:30 am

2 stops19h 10m

Bilbao

lun. 1/19

7:25 am-6:34 pm

2 stops18h 09m

$679

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 21 results
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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 $1,139). 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 agosto 14, 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.

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 agosto 14, 2025.
See what other customers who have flown with United Airlines, Turkish Airlines, and Iberia 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
8,916 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,916 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Turkish Airlines
7.3
Good
3,940 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Iberia
7.0
Good
2,878 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Lufthansa
6.8
Okay
7,317 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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.

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

    Cheapflights users have booked flights from Chicago to Bilbao round-trip from $639. Other airlines that can offer you cheap pricing are Iberia, from $640, and Lufthansa, from $646. United Airlines is 34% 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 $1,139). 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 Bilbao flights
O'Hare Intl to San Sebastian 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 agosto 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$639Average$887FlexibilityNo cancel feeOn-time69%
IberiaCheapest$640Average$894FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$646Average$856FlexibilityNo cancel feeOn-time76%

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