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Bilbao

$414+ Cheap flights from O'Hare Intl (ORD) 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 10/26. 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 O'Hare Intl to Bilbao

Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to Bilbao (BIO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$489
(United Airlines)

One-way from

$436
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$862
From Chicago O'Hare Intl to Bilbao
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One-way flight from Chicago O'Hare Intl to Bilbao
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Highest demand for flights based on searches. 17% potential increase in price ($187 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($22 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 O'Hare Intl to Bilbao

Cheapest flights from O'Hare Intl to Bilbao
Explore the most affordable flight options available from O'Hare Intl 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 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 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
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/297:00 pmORD - BIO
1 stop22h 05mUnited Airlines
Mon 11/312:50 pmBIO - ORD
1 stop31h 20mUnited Airlines
Deal found 9/11$556
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 10/242:08 pmORD - BIO
2 stops21h 17mAir Canada
Thu 10/306:45 amBIO - ORD
2 stops31h 13mAir Canada
Deal found 9/11$560

Cheapflights Fare Finder

 
Customize your flight search to find flights from O'Hare Intl 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 Chicago O'Hare Intl Airport to Bilbao that are best for you.

Fly from

O'Hare Intl

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

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

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Wed 11/12

6:45 am-11:30 am

2 stops21h 45m

Bilbao

Sun 11/16

7:25 am-3:10 pm

1 stop14h 45m

$539

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Tue 12/16

6:05 am-12:20 pm

3 stops23h 15m

$436

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 14 results
1
2

Best time to book a flight from O'Hare Intl to Bilbao

Have a flexible travel schedule? Discover the best time to fly to Bilbao from O'Hare Intl 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 Chicago O'Hare Intl Airport to Bilbao

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Bilbao?

Currently, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Bilbao (average of $541). Flying from Chicago O'Hare Intl Airport 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 ORD to BIO?

Find hourly flight availability from O'Hare Intl 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 Chicago O'Hare Intl Airport to Bilbao, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 41% versus a flight in the afternoon.

Reviews of airlines servicing Bilbao

Get insights into the airlines that provide service to Bilbao. 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 Bilbao. Reviews last updated September 11, 2025.
Peruse reviews from past customers who have flown with United Airlines, Iberia, and Lufthansa from Chicago O'Hare Intl Airport to Bilbao to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Iberia
7.0
Good
2,929 reviews
United Airlines
7.4
Good
8,937 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Lufthansa
6.8
Okay
7,409 reviews
United Airlines
7.4
Good
8,937 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl 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 Chicago O'Hare Intl?

    Located just 3.0 mi from the city center, Bilbao is the airport most travelers will use when flying to Bilbao from Chicago O'Hare Intl. Booking flights from Chicago O'Hare Intl to Bilbao (BIO) should be relatively easy as there are 0 daily inbound flights from Chicago O'Hare Intl from 3 different airlines.

  • How long is the flight from Chicago O'Hare Intl Airport to Bilbao?

    Departing from Chicago O'Hare Intl Airport to Bilbao will take you 12h 30m. The distance between Chicago O'Hare Intl Airport and Bilbao is about 4116 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Chicago O'Hare Intl Airport to Bilbao round-trip?

    Flying on United Airlines is currently your cheapest option to Bilbao, with prices starting at $639. Additional round-trip tickets that might be worth considering are offered by Iberia and Lufthansa, with the lowest prices starting at $640 and $646, respectively. Users have found that United Airlines is 25% cheaper than the other options available to this destination.

  • Can I find deals for flights from O'Hare Intl to Bilbao that include hotel bookings?

    Yes. In addition to deals on O'Hare Intl to Bilbao flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from O'Hare Intl to Bilbao?

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

  • Can I find deals for business class flights from O'Hare Intl to Bilbao?

    Yes. Cheapflights offers flight deals from O'Hare Intl 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 Chicago O'Hare Intl Airport to Bilbao?

    Currently, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Bilbao (average of $541). Flying from Chicago O'Hare Intl Airport 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 O'Hare Intl to Bilbao

See prices for flight routes from nearby airports that may be better suited for you.
Midway to Bilbao flights
O'Hare Intl to San Sebastian flights

Top 3 airlines flying from O'Hare Intl to Bilbao

Discover the top 3 airlines that operate flights from O'Hare Intl 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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