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$440+ 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 4/3. Fares are subject to change and may not be available on all flights or dates of travel.
BIO — ORD
Mar 9 — Mar 161
Sun 3/9
Sun 3/16
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 March 4, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$440
(American Airlines)

Popular in

July

Cheapest in

January

Average price

$710
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. 21% potential increase in price ($164 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 4, 2025.

This American Airlines deal was found by Cheapflights users on 3/4. 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.
Thu 4/39:15 amBIO - ORD
1 stop16h 35mAmerican Airlines
Mon 4/73:51 pmORD - BIO
2 stops13h 54mAmerican Airlines
Deal found 3/4$440
This Travelocity deal was found by Cheapflights users on 3/4. 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.
Wed 4/239:15 amBIO - ORD
1 stop12h 00mIberia
Tue 5/134:45 pmORD - BIO
2 stops17h 10mIberia
Deal found 3/4$454
This Finnair deal was found by Cheapflights users on 3/4. 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.
Tue 6/39:15 amBIO - ORD
1 stop12h 00mMultiple Airlines
Sat 9/134:30 pmORD - BIO
1 stop23h 45mMultiple Airlines
Deal found 3/4$506
This Gotogate deal was found by Cheapflights users on 3/4. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/86:45 amBIO - ORD
1 stop13h 10mLufthansa
Sun 4/134:00 pmORD - BIO
1 stop14h 25mLufthansa
Deal found 3/4$532
This United Airlines deal was found by Cheapflights users on 3/4. 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 4/86:45 amBIO - ORD
2 stops35h 02mUnited Airlines
Sun 4/137:10 amORD - BIO
2 stops33h 15mUnited Airlines
Deal found 3/4$534
This Delta deal was found by Cheapflights users on 3/4. 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 4/17:10 amBIO - MDW
2 stops18h 08mDelta
Tue 4/89:52 amMDW - BIO
2 stops17h 33mDelta
Deal found 3/4$555
This Booking.com deal was found by Cheapflights users on 3/4. 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 4/36:45 amBIO - ORD
2 stops20h 15mAir Canada
Mon 4/72:05 pmORD - BIO
2 stops14h 00mAir Canada
Deal found 3/4$569
This Finnair deal was found by Cheapflights users on 3/4. 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.
Thu 4/36:45 amBIO - ORD
2 stops37h 45mFinnair
Mon 4/712:09 pmORD - BIO
2 stops28h 06mFinnair
Deal found 3/4$590
This KLM deal was found by Cheapflights users on 3/4. 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.
Sun 3/911:55 amBIO - ORD
1 stop33h 35mKLM
Sun 3/165:25 pmORD - BIO
1 stop17h 05mKLM
Deal found 3/4$652
This Delta deal was found by Cheapflights users on 3/4. 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 3/96:50 amBIO - ORD
2 stops19h 54mDelta
Sun 3/165:25 pmORD - BIO
1 stop17h 05mDelta
Deal found 3/4$658
This Expedia deal was found by Cheapflights users on 3/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/166:35 pmBIO - ORD
1 stop28h 35mTAP AIR PORTUGAL
Sat 8/306:15 pmORD - BIO
1 stop16h 50mTAP AIR PORTUGAL
Deal found 3/4$664
This lol.travel deal was found by Cheapflights users on 3/4. 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.
Sun 4/66:30 pmBIO - ORD
1 stop22h 10mTurkish Airlines
Fri 4/1111:25 amORD - BIO
1 stop16h 40mTurkish Airlines
Deal found 3/4$715

Find flights from Bilbao to Illinois within your budget

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 March 4, 2025.

Fly from

Bilbao

Fly to

Illinois

Route

Depart

Return

Price

BilbaoChicago

BIO - ORD

BIOORD

Bilbao

Thu 4/3

9:15 am-6:50 pm

1 stop16h 35m

Chicago O'Hare Intl

Mon 4/7

3:51 pm-12:45 pm

2 stops13h 54m

$440

BilbaoChicago

BIO - ORD

BIOORD

Bilbao

Wed 4/23

9:15 am-2:15 pm

1 stop12h 00m

Chicago O'Hare Intl

Tue 5/13

4:45 pm-4:55 pm

2 stops17h 10m

$454

BilbaoChicago

BIO - ORD

BIOORD

Bilbao

Tue 6/3

9:15 am-2:15 pm

1 stop12h 00m

Chicago O'Hare Intl

Sat 9/13

4:30 pm-11:15 pm

1 stop23h 45m

$506

BilbaoChicago

BIO - ORD

BIOORD

Bilbao

Tue 4/8

6:45 am-12:55 pm

1 stop13h 10m

Chicago O'Hare Intl

Sun 4/13

4:00 pm-1:25 pm

1 stop14h 25m

$532

BilbaoChicago

BIO - ORD

BIOORD

Bilbao

Tue 4/8

6:45 am-10:47 am

2 stops35h 02m

Chicago O'Hare Intl

Sun 4/13

7:10 am-11:25 pm

2 stops33h 15m

$534

BilbaoChicago

BIO - MDW

BIOMDW

Bilbao

Tue 4/1

7:10 am-6:18 pm

2 stops18h 08m

Chicago Midway

Tue 4/8

9:52 am-10:25 am

2 stops17h 33m

$555

BilbaoChicago

BIO - ORD

BIOORD

Bilbao

Thu 4/3

6:45 am-8:00 pm

2 stops20h 15m

Chicago O'Hare Intl

Mon 4/7

2:05 pm-11:05 am

2 stops14h 00m

$569

BilbaoChicago

BIO - ORD

BIOORD

Bilbao

Thu 4/3

6:45 am-1:30 pm

2 stops37h 45m

Chicago O'Hare Intl

Mon 4/7

12:09 pm-11:15 pm

2 stops28h 06m

$590

BilbaoChicago

BIO - ORD

BIOORD

Bilbao

Sat 8/16

6:35 pm-4:10 pm

1 stop28h 35m

Chicago O'Hare Intl

Sat 8/30

6:15 pm-6:05 pm

1 stop16h 50m

$664

BilbaoChicago

BIO - ORD

BIOORD

Bilbao

Sun 4/6

6:30 pm-9:40 am

1 stop22h 10m

Chicago O'Hare Intl

Fri 4/11

11:25 am-11:05 am

1 stop16h 40m

$715

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/4

Showing 1-10 of 24 results
1
2
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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.

Travel insights for flights from Bilbao to Illinois

Get recent, data-driven insights about flights from Bilbao to Illinois including ideal travel times, pricing trends, and more.

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 March 4, 2025.
Read through reviews of airlines operating flights from Bilbao to Illinois, such as Delta, KLM and Finnair. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,061 reviews

Crew

8.5

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

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
8,061 reviews
Delta
8.0
Very good
8,061 reviews

Crew

8.5

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

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
8,061 reviews

Crew

8.5

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

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

Finnair
7.6
Good
1,271 reviews
Delta
8.0
Very good
8,061 reviews

Crew

8.5

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

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
1,560 reviews
Delta
8.0
Very good
8,061 reviews

Crew

8.5

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

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
8,678 reviews
Delta
8.0
Very good
8,061 reviews

Crew

8.5

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

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 Aer Lingus ($450), TAP AIR PORTUGAL ($480), and Delta ($587).

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

    The most popular route from Bilbao to Illinois is Bilbao - Chicago O'Hare Intl. You may also consider Bilbao - Chicago Midway 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 $326). 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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