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Bilbao

$403+ Cheap flights from O'Hare Intl (ORD) 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 3/19. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BIO
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap 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 December 12, 2025.

This Delta deal was found by Cheapflights users on 12/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:20 pmORD - BIO
1 stop17h 00mDelta
Fri 1/166:50 amBIO - ORD
1 stop14h 30mDelta
Deal found 12/11$739
This United Airlines deal was found by Cheapflights users on 12/11. 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 12/316:00 pmORD - BIO
1 stop17h 05mUnited Airlines
Tue 1/2011:35 amBIO - ORD
1 stop13h 50mUnited Airlines
Deal found 12/11$742
This Delta deal was found by Cheapflights users on 12/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:20 pmORD - BIO
1 stop17h 00mDelta
Thu 1/156:50 amBIO - ORD
2 stops17h 36mDelta
Deal found 12/11$749
This KAYAK deal was found by Cheapflights users on 12/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:50 pmORD - BIO
2 stops20h 20mSWISS
Mon 1/198:00 amBIO - ORD
1 stop35h 45mSWISS
Deal found 12/11$751
This Delta deal was found by Cheapflights users on 12/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:02 pmORD - BIO
2 stops16h 18mDelta
Tue 1/206:50 amBIO - ORD
2 stops17h 07mDelta
Deal found 12/11$754
This United Airlines deal was found by Cheapflights users on 12/11. 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 12/316:00 pmORD - BIO
1 stop17h 05mUnited Airlines
Sun 1/187:25 amBIO - ORD
1 stop18h 00mUnited Airlines
Deal found 12/11$792
This KAYAK deal was found by Cheapflights users on 12/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/314:10 pmORD - BIO
1 stop22h 00mSWISS
Sun 1/1811:35 amBIO - ORD
2 stops35h 45mSWISS
Deal found 12/11$817
This Delta deal was found by Cheapflights users on 12/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:02 pmORD - BIO
2 stops16h 18mDelta
Sun 1/187:25 amBIO - ORD
2 stops20h 40mDelta
Deal found 12/11$840
This KAYAK deal was found by Cheapflights users on 12/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:20 pmORD - BIO
2 stops15h 00mScandinavian Airlines
Mon 1/197:30 pmBIO - ORD
2 stops48h 44mScandinavian Airlines
Deal found 12/11$912

Find 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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$492
(FlightHub)

One-way from

$403
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$866
Provider with most accurate pricing for Chicago O'Hare Intl-Bilbao flight deals.
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Provider most trusted by Cheapflights users for Chicago O'Hare Intl-Bilbao flights.
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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. 16% potential increase in price ($162 potential increase over avg. RT price).
Search Deals
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 December 2025
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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 December 12, 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

Sat 4/25

7:15 pm-11:35 am

1 stop33h 20m

Bilbao

Sun 5/17

9:25 pm-4:10 pm

1 stop25h 45m

$586

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Mon 3/30

11:25 am-10:55 am

1 stop16h 30m

Bilbao

Wed 4/8

6:20 pm-6:15 pm

1 stop30h 55m

$605

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Wed 2/4

9:50 pm-6:05 pm

1 stop13h 15m

Bilbao

Mon 2/9

11:35 am-10:05 pm

2 stops41h 30m

$639

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Thu 1/29

11:50 am-11:00 am

1 stop16h 10m

Bilbao

Mon 2/2

12:00 pm-6:25 pm

1 stop37h 25m

$640

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Sun 1/25

10:52 am-10:50 am

2 stops16h 58m

Bilbao

Sun 2/1

6:45 am-3:20 pm

1 stop15h 35m

$675

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Thu 1/29

2:18 pm-9:55 pm

2 stops24h 37m

Bilbao

Mon 2/2

11:35 am-2:10 pm

1 stop33h 35m

$687

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Thu 1/15

9:50 pm-9:55 pm

1 stop17h 05m

Bilbao

Mon 1/19

12:50 pm-3:20 pm

1 stop33h 30m

$691

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Thu 3/19

11:35 pm-11:05 am

2 stops29h 30m

$403

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Thu 3/19

10:50 pm-6:05 pm

1 stop13h 15m

$485

ChicagoBilbao

ORD - BIO

ORDBIO

Chicago O'Hare Intl

Thu 1/1

11:50 am-11:00 am

1 stop16h 10m

$503

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

Showing 1-10 of 12 results
1
2

Compare providers for flights from O'Hare Intl to Bilbao

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from O'Hare Intl to Bilbao in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Chicago O'Hare Intl Airport-Bilbao flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Chicago O'Hare Intl Airport-Bilbao flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-Bilbao flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago O'Hare Intl Airport-Bilbao flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago O'Hare Intl Airport-Bilbao flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Bilbao (average of $547). Flying from Chicago O'Hare Intl Airport 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 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 December 12, 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 40% versus a flight in the evening.

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 December 12, 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
9,094 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,094 reviews
United Airlines
7.4
Good
9,094 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Iberia
7.0
Good
3,045 reviews
United Airlines
7.4
Good
9,094 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Lufthansa
6.8
Okay
7,626 reviews
United Airlines
7.4
Good
9,094 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

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 13h 15m. 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 Lufthansa is currently your cheapest option to Bilbao, with prices starting at $575. Additional round-trip tickets that might be worth considering are offered by Iberia and United Airlines, with the lowest prices starting at $612 and $699, respectively. Users have found that Lufthansa is 32% 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, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Bilbao (average of $547). Flying from Chicago O'Hare Intl Airport 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 O'Hare Intl to Bilbao

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to San Sebastian flights
Midway to Bilbao 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 December 12, 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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