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Bilbao

$321+ 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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BIO
ene. 14 — ene. 211
mié. 1/14
mié. 1/21
1 adult, Economy
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Cheap 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 diciembre 15, 2025.

This Delta deal was found by Cheapflights users on 12/14. 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.
dom. 12/285:20 pmORD - BIO
1 stop17h 00mDelta
jue. 1/17:25 amBIO - ORD
1 stop14h 45mDelta
Deal found 12/14$1,544
This Delta deal was found by Cheapflights users on 12/14. 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.
dom. 12/286:08 pmMDW - BIO
2 stops16h 12mDelta
jue. 1/16:50 amBIO - MDW
2 stops17h 36mDelta
Deal found 12/14$1,794
This United Airlines deal was found by Cheapflights users on 12/15. 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.
vie. 12/196:00 amSTL - BIO
2 stops34h 20mUnited Airlines
sáb. 1/1011:35 amBIO - STL
2 stops58h 54mUnited Airlines
Deal found 12/15$2,064
This American Airlines deal was found by Cheapflights users on 12/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/281:10 pmORD - BIO
2 stops16h 40mAmerican Airlines
jue. 1/19:15 amBIO - ORD
2 stops18h 22mAmerican Airlines
Deal found 12/14$2,265
This Air Canada deal was found by Cheapflights users on 12/15. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/194:05 pmSTL - BIO
2 stops36h 55mMultiple Airlines
sáb. 1/107:25 amBIO - STL
3 stops20h 48mMultiple Airlines
Deal found 12/15$2,670
This Lufthansa deal was found by Cheapflights users on 12/15. 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.
vie. 12/191:05 pmSTL - BIO
2 stops15h 55mLufthansa
sáb. 1/1012:50 pmBIO - STL
1 stop32h 05mLufthansa
Deal found 12/15$3,053
This Air Canada deal was found by Cheapflights users on 12/15. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/199:55 amSTL - BIO
3 stops19h 05mAir Canada
sáb. 1/107:25 amBIO - STL
3 stops20h 48mAir Canada
Deal found 12/15$3,345

Find flight deals from Illinois to Bilbao

Keep the following information in mind while searching for Illinois to Bilbao flight deals. Data was last updated diciembre 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$450
(lol.travel)

One-way from

$321
(Kiwi.com)
Provider with most accurate pricing for Chicago (CHI)-Bilbao flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Bilbao flights.
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From Illinois to Bilbao
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One-way flight from Illinois to Bilbao
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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 diciembre 15, 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

St. LouisBilbao

STL - BIO

STLBIO

Lambert-St Louis

vie. 1/23

6:40 pm-11:20 pm

2 stops21h 40m

Bilbao

mar. 1/27

11:35 am-10:58 pm

2 stops18h 23m

$488

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

jue. 1/15

7:20 pm-6:40 pm

1 stop16h 20m

Bilbao

lun. 1/19

7:30 pm-10:29 pm

2 stops33h 59m

$495

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

dom. 2/8

6:30 pm-6:15 pm

2 stops16h 45m

Bilbao

mar. 2/24

7:10 am-5:20 pm

2 stops17h 10m

$508

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

mar. 3/24

9:20 pm-4:10 pm

1 stop36h 50m

Bilbao

mar. 4/7

11:55 am-6:15 pm

1 stop37h 20m

$555

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

mié. 3/11

10:50 pm-9:55 pm

1 stop17h 05m

Bilbao

mié. 3/18

11:35 am-9:05 pm

2 stops15h 30m

$566

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

mié. 3/11

10:50 pm-9:55 pm

1 stop17h 05m

Bilbao

mié. 3/18

12:50 pm-9:05 pm

1 stop14h 15m

$571

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

dom. 2/8

5:20 pm-5:20 pm

1 stop17h 00m

Bilbao

mar. 2/24

11:55 am-2:20 pm

1 stop33h 25m

$572

ChicagoBilbao

MDW - BIO

MDWBIO

Chicago Midway

dom. 2/8

1:26 pm-11:30 am

2 stops15h 04m

Bilbao

mar. 2/24

6:50 am-6:37 pm

2 stops18h 47m

$585

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

mié. 3/11

1:56 pm-11:30 am

2 stops15h 34m

Bilbao

mié. 3/18

6:50 am-10:01 pm

2 stops21h 11m

$585

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

sáb. 4/25

7:15 pm-11:35 am

1 stop33h 20m

Bilbao

dom. 5/17

9:25 pm-4:10 pm

1 stop25h 45m

$586

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 34 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 December is currently the most expensive (average of $866). 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 diciembre 15, 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 $495, United Airlines can have you in Bilbao from Illinois in 16h 20m. 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 December is currently the most expensive (average of $866). 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 diciembre 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$575Average$862FlexibilityNo cancel feeOn-time76%
IberiaCheapest$612Average$864FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$699Average$901FlexibilityNo cancel feeOn-time69%

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