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Bilbao

$513+ Cheap flights from Illinois 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 11/28. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BIO
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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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 October 30, 2025.

This Booking.com deal was found by Cheapflights users on 10/29. 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.
Fri 11/289:50 pmORD - BIO
1 stop18h 30mLufthansa
Fri 12/56:45 amBIO - ORD
1 stop20h 20mLufthansa
Deal found 10/29$513
This United Airlines deal was found by Cheapflights users on 10/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/288:50 amORD - BIO
2 stops31h 30mUnited Airlines
Fri 12/56:45 amBIO - ORD
1 stop20h 20mUnited Airlines
Deal found 10/29$522
This SmartFares deal was found by Cheapflights users on 10/29. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/111:50 amORD - BIO
1 stop16h 10mTurkish Airlines
Sat 12/612:00 pmBIO - ORD
1 stop29h 05mTurkish Airlines
Deal found 10/29$624
This Travelocity deal was found by Cheapflights users on 10/29. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/19:50 pmORD - BIO
1 stop18h 15mMultiple Airlines
Sat 12/612:50 pmBIO - ORD
2 stops56h 10mMultiple Airlines
Deal found 10/29$658
This FlightHub deal was found by Cheapflights users on 10/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/511:50 amORD - BIO
1 stop21h 20mTurkish Airlines
Sat 11/812:00 pmBIO - ORD
1 stop29h 05mTurkish Airlines
Deal found 10/29$698
This Mytrip deal was found by Cheapflights users on 10/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/286:50 pmORD - BIO
3 stops29h 50mMultiple Airlines
Fri 12/58:30 amBIO - ORD
3 stops35h 40mMultiple Airlines
Deal found 10/29$718
This United Airlines deal was found by Cheapflights users on 10/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/15:55 pmORD - BIO
1 stop12h 55mUnited Airlines
Mon 11/1012:50 pmBIO - ORD
1 stop33h 30mUnited Airlines
Deal found 10/30$790
This Delta deal was found by Cheapflights users on 10/29. 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.
Wed 11/1210:47 amMDW - BIO
2 stops23h 33mDelta
Sun 11/1611:55 amBIO - MDW
2 stops37h 23mDelta
Deal found 10/29$994
This Delta deal was found by Cheapflights users on 10/29. 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.
Mon 12/19:34 amMDW - BIO
2 stops18h 56mDelta
Sat 12/611:55 amBIO - MDW
2 stops18h 52mDelta
Deal found 10/29$1,204
This Delta deal was found by Cheapflights users on 10/29. 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.
Sat 11/14:23 pmMDW - BIO
2 stops18h 57mDelta
Wed 11/1211:55 amBIO - MDW
2 stops18h 45mDelta
Deal found 10/29$1,379
This Delta deal was found by Cheapflights users on 10/29. 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.
Wed 11/51:48 pmMDW - BIO
2 stops14h 42mDelta
Sat 11/86:50 amBIO - MDW
2 stops17h 53mDelta
Deal found 10/29$1,704
This KLM deal was found by Cheapflights users on 10/29. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/131:14 pmMDW - BIO
2 stops15h 06mKLM
Sat 12/207:25 amBIO - MDW
2 stops16h 54mKLM
Deal found 10/29$2,631

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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$513
(Booking.com)

Popular in

April

Cheapest in

February

Average price

$613
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 Illinois to Bilbao
Search Deals
Highest demand for flights based on searches. 28% potential increase in price ($387 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 18% potential price decrease ($151 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 30, 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

Fri 11/28

9:50 pm-11:20 pm

1 stop18h 30m

Bilbao

Fri 12/5

6:45 am-8:05 pm

1 stop20h 20m

$513

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Fri 11/28

8:50 am-11:20 pm

2 stops31h 30m

Bilbao

Fri 12/5

6:45 am-8:05 pm

1 stop20h 20m

$522

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Mon 12/1

9:50 pm-11:05 pm

1 stop18h 15m

Bilbao

Sat 12/6

12:50 pm-2:00 pm

2 stops56h 10m

$658

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Wed 12/24

3:20 pm-11:20 pm

1 stop25h 00m

Bilbao

Mon 1/12

12:50 pm-3:20 pm

1 stop33h 30m

$713

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Fri 11/28

6:50 pm-7:40 am

3 stops29h 50m

Bilbao

Fri 12/5

8:30 am-1:10 pm

3 stops35h 40m

$718

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Wed 12/24

1:37 pm-11:20 pm

2 stops26h 43m

Bilbao

Sun 1/11

6:45 am-9:06 pm

2 stops21h 21m

$718

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Tue 12/23

9:15 pm-11:20 pm

2 stops43h 05m

Bilbao

Mon 1/12

6:45 am-8:13 pm

2 stops20h 28m

$725

St. LouisBilbao

STL - BIO

STLBIO

Lambert-St Louis

Fri 3/27

4:50 pm-12:00 pm

1 stop13h 10m

Bilbao

Tue 3/31

6:45 am-7:25 pm

2 stops19h 40m

$732

ChicagoBilbao

MDW - BIO

MDWBIO

Chicago Midway

Mon 4/6

9:30 am-11:15 am

2 stops18h 45m

Bilbao

Tue 4/21

7:10 am-6:31 pm

2 stops18h 21m

$756

ChicagoBilbao

MDW - BIO

MDWBIO

Chicago Midway

Wed 11/12

1:15 pm-11:30 am

2 stops15h 15m

Bilbao

Sun 11/16

11:55 am-6:18 pm

2 stops37h 23m

$994

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 19 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, August is the cheapest month in which you can book a flight from Illinois to Bilbao (average of $547). Flying from Illinois to Bilbao in July is currently the most expensive (average of $871). 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 October 30, 2025.

It’s optimal to fly from Illinois to Bilbao in the morning. By choosing this option you can save up to 57% on the cost of your flight, compared to a flight in the afternoon.

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 $513, Lufthansa can have you in Bilbao from Illinois in 18h 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, August is the cheapest month in which you can book a flight from Illinois to Bilbao (average of $547). Flying from Illinois to Bilbao in July is currently the most expensive (average of $871). 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$612Average$864FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$639Average$887FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$698Average$881FlexibilityNo cancel feeOn-time76%

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