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$358+ Cheap flights from Illinois 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 9/24. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BIO
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Illinois to Bilbao

Keep the following information in mind while searching for Illinois to Bilbao flight deals. Data was last updated September 11, 2025.

Round-trip from

$489
(United Airlines)

One-way from

$358
(Kiwi.com)

Popular in

April

Cheapest in

January

Average price

$636
From Illinois to Bilbao
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One-way flight from Illinois to Bilbao
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Highest demand for flights based on searches. 29% potential increase in price ($407 potential increase over avg. RT price).
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Cheapest flight prices on average. 17% potential price decrease ($149 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Illinois to Bilbao

Cheapest flights from Illinois to Bilbao
Explore the most affordable flight options available from Illinois to Bilbao. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/10. 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.
Tue 10/79:40 pmORD - BIO
1 stop18h 45mUnited Airlines
Tue 10/146:45 amBIO - ORD
1 stop13h 10mUnited Airlines
Deal found 9/10$489
This Delta deal was found by Cheapflights users on 9/9. 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 10/265:04 pmMDW - BIO
2 stops18h 16mDelta
Tue 11/116:50 amBIO - MDW
2 stops18h 18mDelta
Deal found 9/9$502
This Delta deal was found by Cheapflights users on 9/8. 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 10/121:08 pmMDW - BIO
2 stops15h 07mDelta
Tue 10/216:50 amBIO - MDW
2 stops18h 35mDelta
Deal found 9/8$514
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/14:45 pmORD - BIO
1 stop17h 10mIberia
Sun 12/149:15 amBIO - ORD
1 stop12h 15mIberia
Deal found 9/11$515
This Finnair deal was found by Cheapflights users on 9/11. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/13:03 pmORD - BIO
2 stops25h 12mMultiple Airlines
Sun 12/149:15 amBIO - ORD
1 stop12h 15mMultiple Airlines
Deal found 9/11$524
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/249:40 pmORD - BIO
1 stop13h 10mLufthansa
Thu 10/3011:35 amBIO - ORD
1 stop13h 50mLufthansa
Deal found 9/11$528
This Lufthansa deal was found by Cheapflights users on 9/9. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/129:50 pmORD - BIO
1 stop18h 15mLufthansa
Sun 11/166:45 amBIO - ORD
1 stop13h 25mLufthansa
Deal found 9/9$531
This Delta deal was found by Cheapflights users on 9/9. 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 11/121:25 pmORD - BIO
2 stops15h 05mDelta
Sun 11/167:25 amBIO - ORD
1 stop14h 45mDelta
Deal found 9/9$540
This FlightHub deal was found by Cheapflights users on 9/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/112:50 pmORD - BIO
2 stops17h 00mAir Canada
Sun 12/146:45 amBIO - ORD
2 stops22h 20mAir Canada
Deal found 9/11$543
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Sun 10/512:25 pmSTL - BIO
2 stops15h 40mUnited Airlines
Fri 10/176:45 amBIO - STL
2 stops19h 57mUnited Airlines
Deal found 9/9$546
This FlightHub deal was found by Cheapflights users on 9/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/248:40 amORD - BIO
2 stops26h 45mMultiple Airlines
Thu 10/3011:35 amBIO - ORD
1 stop13h 50mMultiple Airlines
Deal found 9/11$546
This Gurufare deal was found by Cheapflights users on 9/11. 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 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 52mLufthansa
Mon 11/106:50 pmBIO - ORD
1 stop30h 35mLufthansa
Deal found 9/11$547

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois 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 September 11, 2025.
Use the filters below to find and compare flights from Illinois to Bilbao that are best for you.

Fly from

Illinois

Fly to

Bilbao

Route

Depart

Return

Price

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Sun 10/26

5:45 pm-8:50 pm

1 stop21h 05m

Bilbao

Tue 11/11

6:45 am-7:36 pm

2 stops19h 51m

$481

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Sun 10/12

3:35 pm-11:05 am

1 stop12h 30m

Bilbao

Tue 10/21

2:10 pm-7:55 pm

1 stop12h 45m

$482

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Sun 10/12

9:55 am-1:25 pm

2 stops20h 30m

Bilbao

Tue 10/21

9:00 pm-3:55 pm

1 stop25h 55m

$491

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Sun 10/12

3:50 pm-5:50 pm

2 stops19h 00m

Bilbao

Tue 10/21

6:45 am-8:01 am

2 stops32h 16m

$495

ChicagoBilbao

MDW - BIO

MDWBIO

Chicago Midway

Sun 10/26

5:04 pm-5:20 pm

2 stops18h 16m

Bilbao

Tue 11/11

6:50 am-6:08 pm

2 stops18h 18m

$502

ChicagoBilbao

MDW - BIO

MDWBIO

Chicago Midway

Sun 10/12

1:08 pm-11:15 am

2 stops15h 07m

Bilbao

Tue 10/21

6:50 am-6:25 pm

2 stops18h 35m

$514

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Fri 10/24

9:40 pm-5:50 pm

1 stop13h 10m

Bilbao

Thu 10/30

11:35 am-7:25 pm

1 stop13h 50m

$528

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Wed 11/12

9:50 pm-11:05 pm

1 stop18h 15m

Bilbao

Sun 11/16

6:45 am-1:10 pm

1 stop13h 25m

$531

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Fri 10/24

9:40 pm-5:50 pm

1 stop13h 10m

Bilbao

Fri 10/31

7:25 am-3:10 pm

1 stop13h 45m

$532

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Tue 10/7

6:00 pm-11:25 pm

2 stops22h 25m

Bilbao

Tue 10/14

7:15 am-7:55 pm

2 stops19h 40m

$533

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 37 results
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Best time to book a flight from Illinois to Bilbao

Have a flexible travel schedule? Discover the best time to fly to Bilbao from Illinois 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 Illinois to Bilbao

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

Currently, January is the cheapest month in which you can book a flight from Illinois to Bilbao (average of $541). Flying from Illinois to Bilbao in June is currently the most expensive (average of $1,136). 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 IL to BIO?

Find hourly flight availability from Illinois 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 September 11, 2025.

When flying from Illinois to Bilbao, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Related info for your journey

Find useful and relevant information for your journey from Illinois 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 Illinois?

    For a flight from Illinois to Bilbao, you will be flying into Bilbao. Bilbao (BIO) is just 3.0 mi from the center of the city.

  • How long is the flight from Illinois to Bilbao?

    For as low as $482, Lufthansa can have you in Bilbao from Illinois in 12h 30m. There are 4116 mi between Illinois and Bilbao. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from Illinois to Bilbao?

    The most popular route from Illinois to Bilbao is Chicago O'Hare Intl - Bilbao. You may also consider Chicago Midway - Bilbao or Lambert-St Louis - Bilbao.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois 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 Illinois to Bilbao?

    Currently, January is the cheapest month in which you can book a flight from Illinois to Bilbao (average of $541). Flying from Illinois to Bilbao in June is currently the most expensive (average of $1,136). 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 Illinois to Bilbao

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Illinois to Bilbao

Discover the top 3 airlines that operate flights from Illinois 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$639Average$887FlexibilityNo cancel feeOn-time69%
IberiaCheapest$640Average$894FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$646Average$879FlexibilityNo cancel feeOn-time76%

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