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$456+ Cheap flights from Bilbao (BIO) to Illinois

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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
BIO — ORD
Apr 15 — Apr 221
Tue 4/15
Tue 4/22
1 adult, Economy
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Cheap flight deals from Bilbao to Illinois

Keep the following information in mind while searching for Bilbao to Illinois flight deals. Data was last updated April 10, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$456
(Iberia)

Popular in

July

Cheapest in

January

Average price

$590
Provider with most accurate pricing for Bilbao-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Bilbao-Chicago (CHI) flights.
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From Bilbao to Illinois
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Highest demand for flights based on searches. 25% potential increase in price ($197 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Bilbao to Illinois

Cheapest flights from Bilbao to Illinois
Explore the most affordable flight options available from Bilbao to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 10, 2025.

This Iberia deal was found by Cheapflights users on 4/9. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/59:35 pmBIO - ORD
1 stop23h 40mIberia
Sun 5/1110:15 pmORD - BIO
1 stop16h 40mIberia
Deal found 4/9$456
This American Airlines deal was found by Cheapflights users on 4/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/36:45 amBIO - ORD
1 stop14h 30mAmerican Airlines
Sat 9/1310:08 amORD - BIO
2 stops15h 22mAmerican Airlines
Deal found 4/9$533
This KLM deal was found by Cheapflights users on 4/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/265:15 pmBIO - ORD
1 stop27h 55mKLM
Wed 5/75:10 pmORD - BIO
1 stop21h 50mKLM
Deal found 4/10$567
This Delta deal was found by Cheapflights users on 4/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/266:50 amBIO - MDW
2 stops18h 30mDelta
Wed 5/79:20 amMDW - BIO
2 stops18h 05mDelta
Deal found 4/10$575
This United Airlines deal was found by Cheapflights users on 4/9. 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.
Tue 6/36:45 amBIO - ORD
1 stop13h 10mUnited Airlines
Sat 9/133:45 pmORD - BIO
1 stop12h 00mUnited Airlines
Deal found 4/9$575
This SWISS deal was found by Cheapflights users on 4/9. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/511:50 amBIO - ORD
2 stops31h 20mSWISS
Sun 5/112:20 pmORD - BIO
2 stops20h 30mSWISS
Deal found 4/9$717
This Mytrip deal was found by Cheapflights users on 4/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/59:05 pmBIO - ORD
3 stops30h 07mMultiple Airlines
Sun 5/112:20 pmORD - BIO
2 stops14h 35mMultiple Airlines
Deal found 4/9$728
This American Airlines deal was found by Cheapflights users on 4/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/259:15 amBIO - STL
2 stops17h 14mAmerican Airlines
Tue 4/297:19 amSTL - BIO
2 stops18h 11mAmerican Airlines
Deal found 4/9$737
This Delta deal was found by Cheapflights users on 4/9. 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 6/116:50 amBIO - ORD
1 stop14h 20mDelta
Tue 6/179:49 amORD - BIO
2 stops17h 36mDelta
Deal found 4/9$752
This lastminute.com deal was found by Cheapflights users on 4/9. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/106:10 pmBIO - ORD
1 stop26h 50mAer Lingus
Tue 6/1710:20 pmORD - BIO
1 stop12h 10mAer Lingus
Deal found 4/9$765
This KLM deal was found by Cheapflights users on 4/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/86:50 amBIO - STL
2 stops16h 45mKLM
Fri 9/511:51 amSTL - BIO
2 stops15h 34mKLM
Deal found 4/9$774
This United Airlines deal was found by Cheapflights users on 4/9. 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.
Thu 5/86:45 amBIO - STL
2 stops16h 02mUnited Airlines
Fri 9/53:30 pmSTL - BIO
1 stop19h 55mUnited Airlines
Deal found 4/9$789

Cheapflights Fare Finder

Customize your flight search to find flights from Bilbao to Illinois 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 April 10, 2025.
Use the filters below to find and compare flights from Bilbao to Illinois that are best for you.

Fly from

Bilbao

Fly to

Illinois

Route

Depart

Return

Price

BilbaoChicago

BIO - ORD

BIOORD

Bilbao

Mon 5/5

9:35 pm-2:15 pm

1 stop23h 40m

Chicago O'Hare Intl

Sun 5/11

10:15 pm-9:55 pm

1 stop16h 40m

$456

BilbaoChicago

BIO - ORD

BIOORD

Bilbao

Tue 6/3

6:45 am-2:15 pm

1 stop14h 30m

Chicago O'Hare Intl

Sat 9/13

10:08 am-8:30 am

2 stops15h 22m

$533

BilbaoChicago

BIO - ORD

BIOORD

Bilbao

Sat 4/26

5:15 pm-2:10 pm

1 stop27h 55m

Chicago O'Hare Intl

Wed 5/7

5:10 pm-10:00 pm

1 stop21h 50m

$567

BilbaoChicago

BIO - MDW

BIOMDW

Bilbao

Sat 4/26

6:50 am-6:20 pm

2 stops18h 30m

Chicago Midway

Wed 5/7

9:20 am-10:25 am

2 stops18h 05m

$575

BilbaoChicago

BIO - ORD

BIOORD

Bilbao

Tue 6/3

6:45 am-12:55 pm

1 stop13h 10m

Chicago O'Hare Intl

Sat 9/13

3:45 pm-10:45 am

1 stop12h 00m

$575

BilbaoChicago

BIO - ORD

BIOORD

Bilbao

Mon 5/5

11:50 am-12:10 pm

2 stops31h 20m

Chicago O'Hare Intl

Sun 5/11

2:20 pm-5:50 pm

2 stops20h 30m

$717

BilbaoChicago

BIO - ORD

BIOORD

Bilbao

Mon 5/5

9:05 pm-8:12 pm

3 stops30h 07m

Chicago O'Hare Intl

Sun 5/11

2:20 pm-11:55 am

2 stops14h 35m

$728

BilbaoSt. Louis

BIO - STL

BIOSTL

Bilbao

Fri 4/25

9:15 am-7:29 pm

2 stops17h 14m

Lambert-St Louis

Tue 4/29

7:19 am-8:30 am

2 stops18h 11m

$737

BilbaoChicago

BIO - ORD

BIOORD

Bilbao

Wed 6/11

6:50 am-2:10 pm

1 stop14h 20m

Chicago O'Hare Intl

Tue 6/17

9:49 am-10:25 am

2 stops17h 36m

$752

BilbaoChicago

BIO - ORD

BIOORD

Bilbao

Tue 6/10

6:10 pm-2:00 pm

1 stop26h 50m

Chicago O'Hare Intl

Tue 6/17

10:20 pm-5:30 pm

1 stop12h 10m

$765

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/9

Showing 1-10 of 29 results
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Best time to book a flight from Bilbao to Illinois

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

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated April 10, 2025.
Read through reviews of airlines operating flights from Bilbao to Illinois, such as Delta, KLM and SWISS. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,906 reviews

Comfort

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,906 reviews
Delta
8.0
Very good
7,906 reviews

Comfort

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,321 reviews
Delta
8.0
Very good
7,906 reviews

Comfort

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
SWISS
7.5
Good
1,574 reviews
Delta
8.0
Very good
7,906 reviews

Comfort

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air France
7.4
Good
1,427 reviews
Delta
8.0
Very good
7,906 reviews

Comfort

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,634 reviews
Delta
8.0
Very good
7,906 reviews

Comfort

8.0

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Bilbao to Illinois. 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 from for flights from Bilbao to Illinois?

    Located just 3.0 mi from the city center, Bilbao (BIO) is the airport most travelers will use when flying to Illinois from Bilbao.

  • What are the cheapest airlines to fly from Bilbao to Illinois one-way?

    The cheapest airlines for a one-way flight from Bilbao to Illinois are Iberia ($527), TAP AIR PORTUGAL ($597), and Lufthansa ($645).

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

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

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Bilbao to Illinois (average of $245). Flying from Bilbao to Illinois in March is currently the most expensive (average of $321). 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 Bilbao to Illinois

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