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$621+ Cheap flights to Illinois

— ORD
11 Nov — 18 Nov1
1 adult
1 adult, Economy, 0 bags

Flights to Illinois in 2026

Enter your travel dates to find the best prices.

Cheapest flights to Illinois

Mon 12/1010:10 -
1 stop30h 20m
Tue 27/1017:53 -
1 stop23h 07m
Deal found 9/10$1,055
Mon 23/1111:10 -
1 stop23h 49m
Mon 30/1118:45 -
1 stop21h 15m
Deal found 9/10$1,056
Thu 5/1111:10 -
1 stop23h 49m
Mon 9/1117:15 -
1 stop22h 45m
Deal found 10/10$1,059
Mon 23/1110:40 -
2 stops28h 07m
Sun 3/107:45 -
1 stop30h 05m
Deal found 9/10$1,062
Thu 29/1009:40 -
2 stops23h 18m
Fri 13/1111:35 -
2 stops27h 55m
Deal found 9/10$1,131
Sat 31/1009:40 -
2 stops30h 17m
Sat 28/1118:23 -
1 stop21h 07m
Deal found 9/10$1,201
Thu 12/1111:30 -
1 stop46h 25m
Mon 30/1122:45 -
1 stop42h 05m
Deal found 11/10$1,597
Sat 31/1022:20 -
1 stop31h 10m
Sat 28/1114:10 -
1 stop26h 25m
Deal found 11/10$1,802
Thu 24/1211:30 -
1 stop46h 25m
Mon 25/122:45 -
1 stop42h 05m
Deal found 11/10$1,806

Find flights to Illinois

Explore Illinois
Look for other cheap flights to Chicago
Look for other cheap flights to Springfield

Find flight deals to Illinois

Return from

$1,056

One-way from

$621

Popular in

May

Cheapest in

October

Average price

$1,552
American Airlines
  • American Airlines
  • 23/11-30/11
  • 2 total stops
  • 45h 04m total
  • Sydney to Chicago
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Delta
  • Delta
  • 27/1-31/12
  • 2 total stops
  • 26h 57m total
  • Sydney to Illinois
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($159 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease ($50 potential savings vs. average return price).
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Average for return flights in October 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights to Illinois that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 28/1

10:40-13:47

1 stop20h 07m

Chicago O'Hare Intl

Wed 31/12

00:00-16:00

Nonstop0h 00m

$621

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Mon 23/11

10:40-18:05

2 stops24h 25m

Chicago O'Hare Intl

Mon 30/11

15:47-08:30

2 stops23h 43m

$1,062

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Tue 27/10

09:40-17:50

1 stop24h 10m

Chicago O'Hare Intl

Wed 11/11

11:19-08:30

2 stops28h 11m

$1,065

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 29/10

09:40-13:38

1 stop19h 58m

Chicago O'Hare Intl

Fri 13/11

09:51-08:30

2 stops29h 39m

$1,131

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Wed 28/10

18:45-13:30

2 stops34h 45m

Chicago O'Hare Intl

Thu 12/11

14:10-20:50

1 stop37h 40m

$2,068

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 24/12

13:35-21:30

2 stops24h 55m

Chicago O'Hare Intl

Tue 5/1

07:35-06:50

1 stop30h 15m

$2,076

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 5/11

15:15-12:30

1 stop38h 15m

Chicago O'Hare Intl

Mon 9/11

14:10-20:50

1 stop37h 40m

$2,077

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Sun 22/11

21:35-18:20

2 stops37h 45m

Chicago O'Hare Intl

Sun 29/11

11:45-19:25

2 stops38h 40m

$2,096

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Sat 31/10

21:35-20:20

2 stops38h 45m

Chicago O'Hare Intl

Sat 28/11

20:15-19:25

2 stops54h 10m

$2,106

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 5/11

15:15-12:30

1 stop38h 15m

Chicago O'Hare Intl

Mon 9/11

14:10-19:45

2 stops36h 35m

$2,107

Flights are sorted by cheapest return flights first.

Deals found on 9/10

Showing 1-10 of 11 resultsSorted by cheapest first
1
2

Best time to book a flight to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight to Illinois

How long is the flight to Illinois?

On average, a flight from Sydney to Illinois takes 27 hours 31 minutes. Flights to Illinois from other popular cities in Australia will vary in length. Below are a few examples of popular routes and their flight times.

What are the most popular airlines that fly to Illinois?

The most popular airlines flying from Sydney to Illinois are Qantas Airways, American Airlines and United Airlines.

Qantas Airways
Qantas Airways
From $1,331
United Airlines
United Airlines
From $1,302
Air Canada
Air Canada
From $958
American Airlines
American Airlines
From $284

What are the cheapest airlines that fly to Illinois?

The cheapest airlines flying from Sydney to Illinois are American Airlines, Air Canada and Qantas Airways.

Rainfall in Illinois by month

In terms of precipitation, rainfall in Illinois ranges from 43.0 - 125.0 mm per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.

Temperature in Illinois by month

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

When is the best time to book a flight to Illinois?

To ensure you get the cheapest price possible for a flight to Illinois, you should look to book at least 84 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.

Reviews of airlines servicing Illinois

Read through reviews of airlines serving the United States, such as Air New Zealand,Qantas Airways, andUnited Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air New Zealand
8.0
Very Good
671 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

7.9

Entertainment

7.4

Overall

8.0

Food

7.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2026

YVR - AKL

Long haul flight. Would have helped if they gave the both boarding passes, ie include connection- all within the international transit area in Auckland (ie home base) ... all my other recent (non AIR NZ) long haul flights companies managed to do achieve this smoothness...AIR NZ office was shut in very early hours of arrival. Not useful. However: Overall decent experience.
Air New Zealand
8.0
Very Good
671 reviews
Air New Zealand
8.0
Very Good
671 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

7.9

Entertainment

7.4

Overall

8.0

Food

7.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2026

YVR - AKL

Long haul flight. Would have helped if they gave the both boarding passes, ie include connection- all within the international transit area in Auckland (ie home base) ... all my other recent (non AIR NZ) long haul flights companies managed to do achieve this smoothness...AIR NZ office was shut in very early hours of arrival. Not useful. However: Overall decent experience.
Qantas Airways
7.5
Good
1,109 reviews
Air New Zealand
8.0
Very Good
671 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

7.9

Entertainment

7.4

Overall

8.0

Food

7.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2026

YVR - AKL

Long haul flight. Would have helped if they gave the both boarding passes, ie include connection- all within the international transit area in Auckland (ie home base) ... all my other recent (non AIR NZ) long haul flights companies managed to do achieve this smoothness...AIR NZ office was shut in very early hours of arrival. Not useful. However: Overall decent experience.
United Airlines
7.4
Good
10,347 reviews
Air New Zealand
8.0
Very Good
671 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

7.9

Entertainment

7.4

Overall

8.0

Food

7.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2026

YVR - AKL

Long haul flight. Would have helped if they gave the both boarding passes, ie include connection- all within the international transit area in Auckland (ie home base) ... all my other recent (non AIR NZ) long haul flights companies managed to do achieve this smoothness...AIR NZ office was shut in very early hours of arrival. Not useful. However: Overall decent experience.
Air Canada
7.1
Good
11,759 reviews
Air New Zealand
8.0
Very Good
671 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

7.9

Entertainment

7.4

Overall

8.0

Food

7.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2026

YVR - AKL

Long haul flight. Would have helped if they gave the both boarding passes, ie include connection- all within the international transit area in Auckland (ie home base) ... all my other recent (non AIR NZ) long haul flights companies managed to do achieve this smoothness...AIR NZ office was shut in very early hours of arrival. Not useful. However: Overall decent experience.
American Airlines
7.0
Good
12,147 reviews
Air New Zealand
8.0
Very Good
671 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

7.9

Entertainment

7.4

Overall

8.0

Food

7.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2026

YVR - AKL

Long haul flight. Would have helped if they gave the both boarding passes, ie include connection- all within the international transit area in Auckland (ie home base) ... all my other recent (non AIR NZ) long haul flights companies managed to do achieve this smoothness...AIR NZ office was shut in very early hours of arrival. Not useful. However: Overall decent experience.

FAQs about flying to Illinois

  • Can I find cheaper flights to Illinois if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Illinois on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Illinois?

    Based on reviews from Cheapflights users, Air New Zealand is rated the highest out of the airlines that fly to Illinois.

  • What is the cheapest airport to fly to in Illinois?

    Chicago O'Hare Intl is currently the cheapest airport to fly to in Illinois. One-way flights to Chicago O'Hare Intl typically cost $162, while return flights cost around $215.

  • How much is a return flight to Illinois?

    A return flight to Illinois will typically cost around $410, however they can be found for as little as $215.

  • Where does the fastest flight to Illinois depart from?

    For those looking to save time traveling to Illinois, Perth offers the quickest one-way flight (22 hours 20 minutes).

  • Does Chicago O'Hare Intl have car hire?

    Yes. Those touching down at Chicago O'Hare Intl can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Chicago O'Hare Intl?

    Yes. Chicago O'Hare Intl has hotels nearby for those requiring accommodations. Hilton Chicago O'Hare Airport is the closest property to Chicago O'Hare Intl (0.0 km away from Chicago O'Hare Intl).

See more FAQs

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