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$581+ Cheap flights from Aalborg (AAL) 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 3/12. Fares are subject to change and may not be available on all flights or dates of travel.
AAL — ORD
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Aalborg to Illinois

Cheapest flights from Aalborg to Illinois
Explore the most affordable flight options available from Aalborg to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Ticket deal was found by Cheapflights users on 12/16. 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.
Wed 12/316:00 amAAL - ORD
1 stop15h 20mKLM
Sun 1/44:25 pmORD - AAL
1 stop23h 05mKLM
Deal found 12/16$947
This Expedia deal was found by Cheapflights users on 12/16. 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.
Wed 12/316:00 amAAL - ORD
1 stop15h 20mMultiple Airlines
Sun 1/47:25 amORD - AAL
2 stops23h 20mMultiple Airlines
Deal found 12/16$1,127
This Delta deal was found by Cheapflights users on 12/16. 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 12/312:20 pmAAL - ORD
2 stops26h 16mDelta
Sun 1/44:25 pmORD - AAL
1 stop18h 10mDelta
Deal found 12/16$1,150

Find flight deals from Aalborg to Illinois

Keep the following information in mind while searching for Aalborg to Illinois flight deals. Data was last updated December 18, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$581
(Delta)

Popular in

July

Cheapest in

May

Average price

$593
Provider with most accurate pricing for Aalborg-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Aalborg-Chicago (CHI) flights.
Search Deals
From Aalborg to Illinois
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($138 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Aalborg 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 December 18, 2025.
Use the filters below to find and compare flights from Aalborg to Illinois that are best for you.

Fly from

Aalborg

Fly to

Illinois

Route

Depart

Return

Price

AalborgChicago

AAL - ORD

AALORD

Aalborg

Thu 3/12

6:00 am-11:56 pm

2 stops23h 56m

Chicago O'Hare Intl

Mon 3/30

4:50 pm-1:40 pm

1 stop13h 50m

$581

AalborgChicago

AAL - ORD

AALORD

Aalborg

Thu 3/12

10:20 am-8:24 pm

2 stops16h 04m

Chicago O'Hare Intl

Tue 3/31

4:20 pm-1:40 pm

1 stop14h 20m

$583

AalborgChicago

AAL - ORD

AALORD

Aalborg

Sat 3/14

2:20 pm-3:20 pm

1 stop31h 00m

Chicago O'Hare Intl

Wed 4/1

4:50 pm-1:40 pm

1 stop13h 50m

$585

AalborgChicago

AAL - ORD

AALORD

Aalborg

Mon 3/16

6:00 am-3:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Thu 4/2

4:20 pm-1:40 pm

1 stop14h 20m

$597

AalborgChicago

AAL - ORD

AALORD

Aalborg

Wed 3/11

6:00 am-3:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Tue 3/31

4:20 pm-10:00 am

1 stop10h 40m

$597

AalborgChicago

AAL - ORD

AALORD

Aalborg

Wed 3/11

10:20 am-3:20 pm

1 stop11h 00m

Chicago O'Hare Intl

Thu 4/2

4:20 pm-10:00 am

1 stop10h 40m

$597

AalborgChicago

AAL - ORD

AALORD

Aalborg

Tue 3/10

2:20 pm-3:20 pm

1 stop31h 00m

Chicago O'Hare Intl

Thu 4/2

4:20 pm-1:40 pm

1 stop14h 20m

$597

AalborgChicago

AAL - ORD

AALORD

Aalborg

Sun 3/15

2:20 pm-3:20 pm

1 stop31h 00m

Chicago O'Hare Intl

Thu 4/2

4:20 pm-5:45 pm

1 stop18h 25m

$597

AalborgChicago

AAL - ORD

AALORD

Aalborg

Mon 3/16

6:00 am-3:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Wed 4/1

9:43 am-10:00 am

2 stops17h 17m

$598

AalborgChicago

AAL - ORD

AALORD

Aalborg

Mon 3/16

10:20 am-3:20 pm

1 stop11h 00m

Chicago O'Hare Intl

Tue 3/31

1:56 pm-5:45 pm

2 stops20h 49m

$598

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 12 results
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Best time to book a flight from Aalborg to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Aalborg 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 Aalborg to Illinois

What is the cheapest month to book a flight from Aalborg to Illinois?

Currently, January is the cheapest month in which you can book a flight from Aalborg to Illinois (average of $408). Flying from Aalborg to Illinois in July is currently the most expensive (average of $638). 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.

Related info for your journey

Find useful and relevant information for your journey from Aalborg 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 Aalborg to Illinois?

    Located just 4.0 mi from the city center, Aalborg (AAL) is the airport most travelers will use when flying to Illinois from Aalborg.

  • How long is the flight from Aalborg to Illinois?

    Departing from Aalborg to Illinois will take you 23h 56m. The distance between Aalborg and Illinois is about 4110 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Aalborg to Illinois that include hotel bookings?

    Yes. In addition to deals on Aalborg to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Aalborg to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Aalborg to Illinois.

  • Can I find deals for business class flights from Aalborg to Illinois?

    Yes. Cheapflights offers flight deals from Aalborg 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 Aalborg to Illinois?

    Currently, January is the cheapest month in which you can book a flight from Aalborg to Illinois (average of $408). Flying from Aalborg to Illinois in July is currently the most expensive (average of $638). 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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