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$985+ Cheap flights to Illinois

— ORD
26 Oct — 2 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 9/1114:00 -
3 stops32h 13m
Mon 16/1106:30 -
3 stops37h 05m
Deal found 25/9$1,376
Fri 16/1014:15 -
3 stops31h 01m
Sat 31/1006:30 -
3 stops38h 05m
Deal found 26/9$1,564
Thu 22/1014:15 -
3 stops31h 01m
Sat 31/1006:30 -
3 stops38h 05m
Deal found 25/9$1,570
Tue 10/1107:30 -
2 stops32h 29m
Tue 17/1110:34 -
2 stops31h 01m
Deal found 25/9$1,709
Thu 5/1114:05 -
2 stops27h 54m
Thu 12/1111:52 -
2 stops27h 43m
Deal found 23/9$1,796
Mon 9/1111:05 -
1 stop42h 25m
Mon 16/1114:10 -
1 stop48h 05m
Deal found 25/9$1,803
Thu 29/1022:20 -
1 stop31h 10m
Fri 6/1114:10 -
1 stop26h 25m
Deal found 25/9$1,807
Thu 22/1022:20 -
1 stop31h 35m
Sat 31/1015:10 -
1 stop26h 25m
Deal found 25/9$1,809
Mon 16/1122:20 -
1 stop31h 10m
Mon 30/1114:10 -
1 stop26h 25m
Deal found 22/9$1,847
Tue 10/1115:15 -
1 stop38h 15m
Tue 17/1114:10 -
1 stop48h 05m
Deal found 25/9$1,856
Thu 15/1009:55 -
2 stops30h 28m
Fri 30/1014:40 -
2 stops25h 55m
Deal found 25/9$1,860

Find flights to Illinois

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

Find flight deals to Illinois

Return from

$1,376

One-way from

$985

Popular in

May

Cheapest in

October

Average price

$1,796
9/11-16/11
  • 9/11-16/11
  • 6 total stops
  • 69h 18m total
  • Sydney to Chicago
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Etihad Airways
  • Etihad Airways
  • 10/10-31/12
  • 1 total stop
  • 34h 05m total
  • Sydney to Illinois
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($154 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease ($49 potential savings vs. average return price).
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Average for return flights in September 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

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Tue 3/11

21:30-07:55

1 stop51h 25m

Chicago O'Hare Intl

Wed 31/12

00:00-16:00

Nonstop0h 00m

$1,032
Fastest return journey

SydneyMoline

SYD Sydney Kingsford Smith - MLI Moline Quad-City

SYDMLI

Sydney Kingsford Smith

Tue 23/2

11:50-10:14

2 stops39h 24m

Moline Quad-City

Wed 31/12

00:00-16:00

Nonstop0h 00m

$1,037

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 15/10

09:55-00:23

2 stops30h 28m

Chicago O'Hare Intl

Fri 30/10

14:40-08:35

2 stops25h 55m

$1,860

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 5/11

22:20-12:30

1 stop31h 10m

Chicago O'Hare Intl

Mon 9/11

14:10-20:50

1 stop37h 40m

$1,894

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Wed 14/10

11:55-22:55

2 stops27h 00m

Chicago O'Hare Intl

Thu 29/10

15:47-08:35

2 stops24h 48m

$1,974

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 22/10

08:40-13:55

1 stop45h 15m

Chicago O'Hare Intl

Sat 31/10

15:10-06:05

2 stops46h 55m

$1,990

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Fri 6/11

11:30-05:40

2 stops35h 10m

Chicago O'Hare Intl

Fri 13/11

22:45-09:50

1 stop42h 05m

$2,028

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 29/10

19:45-13:30

2 stops33h 45m

Chicago O'Hare Intl

Fri 6/11

14:10-13:00

1 stop29h 50m

$2,047

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Tue 10/11

21:35-18:20

2 stops37h 45m

Chicago O'Hare Intl

Tue 17/11

20:15-19:25

2 stops54h 10m

$2,091

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 8/10

22:05-09:40

2 stops51h 35m

Chicago O'Hare Intl

Sat 24/10

21:15-19:25

2 stops54h 10m

$2,155

Flights are sorted by cheapest return flights first.

Deals found on 21/9

Showing 1-10 of 12 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 23 hours 11 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, United Airlines and Air Canada.

Qantas Airways
Qantas Airways
From $1,264
United Airlines
United Airlines
From $1,295
Air Canada
Air Canada
From $952
Air New Zealand
Air New Zealand
From $1,030

What are the cheapest airlines that fly to Illinois?

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

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 87 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
669 reviews
Check prices

Boarding

8.2

Comfort

7.9

Overall

8.0

Food

7.5

Crew

8.5

Entertainment

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed
Air New Zealand
8.0
Very Good
669 reviews
Air New Zealand
8.0
Very Good
669 reviews
Check prices

Boarding

8.2

Comfort

7.9

Overall

8.0

Food

7.5

Crew

8.5

Entertainment

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed
Qantas Airways
7.5
Good
1,102 reviews
Air New Zealand
8.0
Very Good
669 reviews
Check prices

Boarding

8.2

Comfort

7.9

Overall

8.0

Food

7.5

Crew

8.5

Entertainment

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed
United Airlines
7.4
Good
10,248 reviews
Air New Zealand
8.0
Very Good
669 reviews
Check prices

Boarding

8.2

Comfort

7.9

Overall

8.0

Food

7.5

Crew

8.5

Entertainment

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed
Air Canada
7.1
Good
11,690 reviews
Air New Zealand
8.0
Very Good
669 reviews
Check prices

Boarding

8.2

Comfort

7.9

Overall

8.0

Food

7.5

Crew

8.5

Entertainment

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed
American Airlines
7.0
Good
12,098 reviews
Air New Zealand
8.0
Very Good
669 reviews
Check prices

Boarding

8.2

Comfort

7.9

Overall

8.0

Food

7.5

Crew

8.5

Entertainment

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed

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, American Airlines is rated the highest out of the airlines that fly to Illinois.

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

    Chicago Midway is currently the cheapest airport to fly to in Illinois. One-way flights to Chicago Midway typically cost $154, while return flights cost around $214.

  • How much is a return flight to Illinois?

    A return flight to Illinois will typically cost around $408, however they can be found for as little as $214.

  • Where does the fastest flight to Illinois depart from?

    For those looking to save time traveling to Illinois, Sydney Kingsford Smith offers the quickest one-way flight (21 hours 11 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

Browse thousands of different options on Cheapflights for your next trip

Find flights to Illinois

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