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$776+ Cheap flights to Illinois

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 22/5. Fares are subject to change and may not be available on all flights or dates of travel.
— ORD
15 Feb — 22 Feb1
1 adult
1 adult, Economy, 0 bags

Flights to Illinois in 2026

Find the latest flights to Illinois in 2026, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 647,157 searches and data was last updated on 16 January 2026.

Return from

$1,532

One-way from

$776

Popular in

December

Cheapest in

February

Average price

$1,481
Air New Zealand
  • Air New Zealand
  • 8/2-9/2
  • 4 total stops
  • 56h 54m total
  • Sydney to Chicago
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22/5
  • 22/5
  • 2 total stops
  • 32h 31m total
  • Sydney to Illinois
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($306 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($52 potential savings vs. average return price).
Search Deals
Average for return flights in January 2026
Search Deals

Find flights to Illinois

Browse one-way and return flights deals to Illinois on Cheapflights. Flight deals are based on user searches and were last updated on 16 January 2026
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Cheapest flights to Illinois
Explore the most affordable flight options available to Illinois. Find the lowest fares based on data from user searches, with prices last updated on 16 January 2026.

Fri 29/511:55
SYD
-
ORD
2 stops28h 03m
Air New Zealand
Fri 5/616:40
ORD
-
SYD
2 stops27h 00m
Air New Zealand
Deal found 16/1$1,505
Sun 8/209:55
SYD
-
ORD
2 stops30h 04m
Air New Zealand
Mon 9/214:40
ORD
-
SYD
2 stops26h 50m
Air New Zealand
Deal found 15/1$1,532
Wed 4/211:20
SYD
-
ORD
1 stop20h 21m
Air Canada
Thu 19/215:35
ORD
-
SYD
1 stop25h 00m
Air Canada
Deal found 15/1$1,566
Tue 3/211:20
SYD
-
ORD
1 stop20h 21m
Air Canada
Wed 18/215:35
ORD
-
SYD
1 stop25h 00m
Air Canada
Deal found 14/1$1,569
Fri 13/211:45
SYD
-
ORD
2 stops26h 43m
Air New Zealand
Fri 20/214:33
ORD
-
SYD
2 stops26h 57m
Air New Zealand
Deal found 14/1$1,602
Sat 16/509:55
SYD
-
ORD
2 stops26h 36m
Air New Zealand
Sat 6/616:40
ORD
-
SYD
2 stops27h 00m
Air New Zealand
Deal found 15/1$1,617
Thu 5/211:20
SYD
-
ORD
1 stop20h 21m
Air Canada
Sun 8/220:40
ORD
-
SYD
2 stops43h 55m
Air Canada
Deal found 14/1$1,624
Thu 19/211:20
SYD
-
STL
2 stops26h 06m
Air Canada
Mon 23/216:30
STL
-
SYD
2 stops24h 05m
Air Canada
Deal found 14/1$1,729
Tue 3/210:40
SYD
-
MDW
2 stops23h 49m
Delta
Wed 18/213:49
MDW
-
SYD
2 stops25h 41m
Delta
Deal found 15/1$1,729
Tue 3/311:20
SYD
-
STL
1 stop29h 39m
American Airlines
Mon 13/412:27
STL
-
SYD
2 stops27h 38m
American Airlines
Deal found 14/1$1,734
Tue 3/317:45
SYD
-
STL
1 stop23h 14m
Multiple Airlines
Mon 13/418:11
STL
-
SYD
1 stop21h 44m
Multiple Airlines
Deal found 13/1$1,757
Thu 19/212:10
SYD
-
STL
1 stop21h 34m
United Airlines
Mon 23/216:28
STL
-
SYD
1 stop21h 32m
United Airlines
Deal found 14/1$1,759

Cheapflights Fare Finder

 
Locate flights to Illinois that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 647,157 searches and data was last updated on 16 January 2026.
Use the filters below to find and compare flights to Illinois that are best for you.

Fly from

Sydney

Route

Depart

Return

Price

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Fri 29/5

11:55-00:58

2 stops28h 03m

Chicago O'Hare Intl

Fri 5/6

16:40-10:40

2 stops27h 00m

$1,505

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 5/2

11:20-19:45

2 stops25h 25m

Chicago O'Hare Intl

Sun 8/2

20:40-09:35

2 stops43h 55m

$1,626

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 23/3

10:25-14:41

1 stop20h 16m

Chicago O'Hare Intl

Tue 28/4

15:40-07:20

1 stop24h 40m

$1,674

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 18/2

11:20-14:41

1 stop20h 21m

Chicago O'Hare Intl

Sun 22/2

20:40-09:35

2 stops43h 55m

$1,684

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Tue 3/2

10:40-17:29

2 stops23h 49m

Chicago Midway

Wed 18/2

13:49-08:30

2 stops25h 41m

$1,729

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 24/3

11:50-17:05

1 stop21h 15m

Chicago O'Hare Intl

Tue 28/4

16:00-07:00

1 stop24h 00m

$1,729

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 24/3

12:10-18:52

1 stop22h 42m

Chicago O'Hare Intl

Wed 29/4

16:40-06:55

1 stop23h 15m

$1,729

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 24/3

13:15-23:59

2 stops26h 44m

Chicago O'Hare Intl

Wed 29/4

15:54-06:35

2 stops23h 41m

$1,729

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 25/3

10:25-17:02

2 stops22h 37m

Chicago O'Hare Intl

Sat 2/5

21:20-06:55

1 stop42h 35m

$1,729

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 19/2

11:20-20:26

2 stops26h 06m

Lambert-St Louis

Mon 23/2

16:30-09:35

2 stops24h 05m

$1,729

Flights are sorted by cheapest return flights first.

Deals found on 15/1

Showing 1-10 of 23 results
1
2
3

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
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 to Illinois

How long is the flight to Illinois?

On average, a flight from Sydney to Illinois takes 21 hours 59 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, Air Canada and United Airlines.

Qantas Airways
Qantas Airways
From $851
United Airlines
United Airlines
From $1,320
Air Canada
Air Canada
From $1,154
Air New Zealand
Air New Zealand
From $1,148

What are the cheapest airlines that fly to Illinois?

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

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals 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

Plan your trip to Illinois by taking into account the average temperature totals 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).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated 16 January 2026.
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
570 reviews
Check prices

Crew

8.5

Entertainment

7.4

Overall

8.0

Food

7.4

Comfort

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
Air New Zealand
8.0
Very Good
570 reviews
Air New Zealand
8.0
Very Good
570 reviews
Check prices

Crew

8.5

Entertainment

7.4

Overall

8.0

Food

7.4

Comfort

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
Qantas Airways
7.5
Good
971 reviews
Air New Zealand
8.0
Very Good
570 reviews
Check prices

Crew

8.5

Entertainment

7.4

Overall

8.0

Food

7.4

Comfort

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
United Airlines
7.4
Good
9,164 reviews
Air New Zealand
8.0
Very Good
570 reviews
Check prices

Crew

8.5

Entertainment

7.4

Overall

8.0

Food

7.4

Comfort

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
American Airlines
7.2
Good
11,134 reviews
Air New Zealand
8.0
Very Good
570 reviews
Check prices

Crew

8.5

Entertainment

7.4

Overall

8.0

Food

7.4

Comfort

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………
Air Canada
7.1
Good
10,623 reviews
Air New Zealand
8.0
Very Good
570 reviews
Check prices

Crew

8.5

Entertainment

7.4

Overall

8.0

Food

7.4

Comfort

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

BNE - AKL

I couldn’t operate reclining the seat. Neither could the passenger next to mec or the passenger across the aisle. This was in premium economy. We all tried following screen instructions but had no luck. Not really a problem on a 3 hour flight but any longer………

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 O'Hare Intl is currently the cheapest airport to fly to in Illinois. One-way flights to Chicago O'Hare Intl typically cost $49, while return flights cost around $715.

  • How much is a return flight to Illinois?

    A return flight to Illinois will typically cost around $1,155, however they can be found for as little as $715.

  • 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 (19 hours 45 minutes).

  • Which airport is closest to River North?

    f being close to River North is important to you, you’ll want to land at Chicago O'Hare Intl Airport.

  • 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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