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O'Hare Intl

$644+ Cheap flights from Billund (BLL) to O'Hare Intl (ORD)

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 9/18. Fares are subject to change and may not be available on all flights or dates of travel.
BLL — ORD
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheapflights Tip: The best prices from Billund to Chicago O'Hare Intl are usually found in January or March, booked 24 days in advance, depart on a Thursday or Wednesday and return on a Tuesday

Cheap flight deals from Billund to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from Billund (BLL) to O'Hare Intl (ORD). 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 July 3, 2025.

Round-trip from

$644
(Delta)

Popular in

June

Cheapest in

January

Average price

$789
From Billund to Chicago O'Hare Intl
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Highest demand for flights based on searches. 16% potential increase in price ($124 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 July 2025
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Find flight deals from Billund to O'Hare Intl

Cheapest flights from Billund to O'Hare Intl
Explore the most affordable flight options available from Billund to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

This Delta deal was found by Cheapflights users on 7/3. 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.
Thu 9/1811:50 amBLL - ORD
2 stops16h 33mDelta
Sun 9/289:10 amORD - BLL
2 stops17h 25mDelta
Deal found 7/3$644
This Travelis deal was found by Cheapflights users on 7/3. 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 Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/56:00 amBLL - ORD
1 stop15h 10mKLM
Sat 8/234:20 pmORD - BLL
1 stop23h 40mKLM
Deal found 7/3$708
This Lufthansa deal was found by Cheapflights users on 7/3. 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.
Sun 8/176:00 amBLL - ORD
1 stop13h 30mLufthansa
Sun 8/246:00 pmORD - BLL
1 stop11h 25mLufthansa
Deal found 7/3$711
This Mytrip deal was found by Cheapflights users on 7/1. 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 8/256:00 amBLL - ORD
3 stops22h 15mMultiple Airlines
Mon 9/110:15 pmORD - BLL
2 stops17h 10mMultiple Airlines
Deal found 7/1$788
This Ticket deal was found by Cheapflights users on 7/2. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/110:25 amBLL - ORD
1 stop16h 15mLOT
Fri 8/224:55 pmORD - BLL
2 stops43h 25mLOT
Deal found 7/2$838
This Travelis deal was found by Cheapflights users on 7/2. 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 Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/17:25 amBLL - ORD
2 stops35h 30mFinnair
Sat 8/235:40 pmORD - BLL
2 stops19h 30mFinnair
Deal found 7/2$981
This Scandinavian Airlines deal was found by Cheapflights users on 7/2. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/176:25 amBLL - ORD
3 stops22h 15mScandinavian Airlines
Sat 9/2710:15 amORD - BLL
2 stops16h 10mScandinavian Airlines
Deal found 7/2$1,010
This WestJet deal was found by Cheapflights users on 7/3. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/176:15 amBLL - ORD
2 stops41h 29mWestJet
Sun 8/245:30 pmORD - BLL
2 stops45h 55mWestJet
Deal found 7/3$2,469

Cheapflights Fare Finder

Customize your flight search to find flights from Billund to O'Hare Intl 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 July 3, 2025.
Use the filters below to find and compare flights from Billund to Chicago O'Hare Intl Airport that are best for you.

Fly from

Billund

Fly to

O'Hare Intl

Route

Depart

Return

Price

BillundChicago

BLL - ORD

BLLORD

Billund

Thu 9/18

11:50 am-9:23 pm

2 stops16h 33m

Chicago O'Hare Intl

Sun 9/28

9:10 am-9:35 am

2 stops17h 25m

$644

BillundChicago

BLL - ORD

BLLORD

Billund

Tue 8/5

6:00 am-2:10 pm

1 stop15h 10m

Chicago O'Hare Intl

Sat 8/23

4:20 pm-11:00 pm

1 stop23h 40m

$708

BillundChicago

BLL - ORD

BLLORD

Billund

Sun 8/17

6:00 am-12:30 pm

1 stop13h 30m

Chicago O'Hare Intl

Sun 8/24

6:00 pm-12:25 pm

1 stop11h 25m

$711

BillundChicago

BLL - ORD

BLLORD

Billund

Mon 8/25

6:00 am-9:15 pm

3 stops22h 15m

Chicago O'Hare Intl

Mon 9/1

10:15 pm-10:25 pm

2 stops17h 10m

$788

BillundChicago

BLL - ORD

BLLORD

Billund

Fri 8/1

10:25 am-7:40 pm

1 stop16h 15m

Chicago O'Hare Intl

Fri 8/22

4:55 pm-7:20 pm

2 stops43h 25m

$838

BillundChicago

BLL - ORD

BLLORD

Billund

Fri 8/1

7:25 am-11:55 am

2 stops35h 30m

Chicago O'Hare Intl

Sat 8/23

5:40 pm-8:10 pm

2 stops19h 30m

$981

BillundChicago

BLL - ORD

BLLORD

Billund

Wed 9/17

6:25 am-9:40 pm

3 stops22h 15m

Chicago O'Hare Intl

Sat 9/27

10:15 am-9:25 am

2 stops16h 10m

$1,010

BillundChicago

BLL - ORD

BLLORD

Billund

Sun 8/17

6:15 am-4:44 pm

2 stops41h 29m

Chicago O'Hare Intl

Sun 8/24

5:30 pm-10:25 pm

2 stops45h 55m

$2,469

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

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

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

How far ahead should I book a flight from Billund to Chicago O'Hare Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Billund to O'Hare Intl. Price data was last updated on June 27, 2025.

To ensure you get the cheapest price possible for a flight from Billund to Chicago O'Hare Intl Airport, you should look to book at least 24 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, August is the cheapest month in which you can book a flight from Billund to Chicago O'Hare Intl Airport (average of $245). Flying from Billund to Chicago O'Hare Intl Airport 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.

How much does it cost to fly round-trip from Billund to Chicago O'Hare Intl Airport?

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. 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 O'Hare Intl. Reviews last updated July 3, 2025.
See what other customers who have flown with Delta, KLM, and LOT from Billund to Chicago O'Hare Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,970 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,970 reviews
Delta
8.0
Very good
7,970 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,366 reviews
Delta
8.0
Very good
7,970 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
LOT
7.6
Good
1,093 reviews
Delta
8.0
Very good
7,970 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,306 reviews
Delta
8.0
Very good
7,970 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Scandinavian Airlines
7.3
Good
1,416 reviews
Delta
8.0
Very good
7,970 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

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

    Billund (BLL) is the airport you will fly out of if you book a flight from Billund to Chicago O'Hare Intl. You should not have trouble finding flights to Chicago O'Hare Intl from Billund; the airport handles an average of 0 outbound flights to Chicago O'Hare Intl per day. You should also have plenty of airline options to choose from since 2 airlines have flights from the Billund airport to Chicago O'Hare Intl. It is only a 1.7 mi journey to Billund (BLL) from Billund’s city center.

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

    Our cheapest airline available from Billund to Chicago O'Hare Intl Airport is Delta. Our recent data shows that you can find tickets from as low as $644 on this airline. Additional options worth looking into are KLM and Lufthansa, starting at $708 and $711 round-trip.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Billund to Chicago O'Hare Intl Airport (average of $245). Flying from Billund to Chicago O'Hare Intl Airport 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

Traveling to a place near Billund?

Book flights to Billund if you plan to visit one of these locations
Schaumburg
Hoffman Estates
Rosemont
Beloit
Skokie
Des Plaines
Arlington Heights
Elgin
Naperville
Orland Park
Elk Grove Village
Racine
Rockford
Tinley Park
Merrillville
Bridgeview
Glenview
Lake Geneva
Joliet
Waukegan

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Billund to O'Hare Intl

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

Top 2 airlines flying from Billund to O'Hare Intl

Discover the top 2 airlines that operate flights from Billund to O'Hare Intl. 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$427Average$697FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$559Average$700FlexibilityNo cancel feeOn-time76%

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