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$560+ 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 28/4. Fares are subject to change and may not be available on all flights or dates of travel.
— ORD
9 Mar — 16 Mar1
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
Explore the most affordable flight options available to Illinois. Find the lowest fares based on data from user searches, with prices last updated on 7 February 2026.

Tue 2/609:20
SYD
-
ORD
1 stop20h 25m
Air Canada
Tue 4/815:40
ORD
-
SYD
1 stop24h 40m
Air Canada
Deal found 5/2$1,137
Mon 5/1010:20
SYD
-
ORD
1 stop20h 28m
Air Canada
Thu 22/1008:45
ORD
-
SYD
2 stops31h 35m
Air Canada
Deal found 6/2$1,142
Thu 5/311:20
SYD
-
ORD
1 stop20h 21m
Air Canada
Wed 18/307:15
ORD
-
SYD
2 stops33h 20m
Air Canada
Deal found 6/2$1,143
Thu 19/310:25
SYD
-
ORD
2 stops37h 35m
Air Canada
Tue 21/408:50
ORD
-
SYD
1 stop31h 30m
Air Canada
Deal found 6/2$1,147
Thu 12/310:25
SYD
-
ORD
2 stops25h 45m
Air Canada
Thu 19/307:15
ORD
-
SYD
2 stops33h 20m
Air Canada
Deal found 6/2$1,159
Thu 14/509:20
SYD
-
STL
2 stops49h 44m
Air Canada
Thu 4/607:30
STL
-
SYD
2 stops32h 50m
Air Canada
Deal found 6/2$1,262
Mon 23/309:40
SYD
-
STL
2 stops27h 26m
Delta
Mon 30/307:03
STL
-
SYD
2 stops32h 47m
Delta
Deal found 6/2$1,311
Thu 19/211:20
SYD
-
STL
2 stops23h 40m
American Airlines
Mon 23/209:35
STL
-
SYD
2 stops30h 25m
American Airlines
Deal found 5/2$1,496
Sat 7/311:20
SYD
-
STL
2 stops26h 25m
Multiple Airlines
Sun 22/316:05
STL
-
SYD
2 stops48h 30m
Multiple Airlines
Deal found 4/2$1,517
Thu 19/211:50
SYD
-
STL
1 stop20h 48m
United Airlines
Mon 23/217:25
STL
-
SYD
1 stop22h 50m
United Airlines
Deal found 5/2$1,521
Mon 23/311:50
SYD
-
STL
1 stop20h 15m
United Airlines
Mon 30/308:30
STL
-
SYD
1 stop31h 25m
United Airlines
Deal found 6/2$1,523
Wed 11/210:40
SYD
-
MDW
2 stops23h 49m
Delta
Wed 18/213:28
MDW
-
SYD
2 stops26h 02m
Delta
Deal found 6/2$1,559

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 7 February 2026
Explore Illinois
Look for other cheap flights to Chicago
Look for other cheap flights to Moline
Look for other cheap flights to St. Louis

Find flight deals to Illinois

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 7 February 2026.

Return from

$1,137

One-way from

$560

Popular in

December

Cheapest in

April

Average price

$1,546
Air Canada
  • Air Canada
  • 2/6-4/8
  • 2 total stops
  • 45h 05m total
  • Sydney to Chicago
Search Deals
28/4
  • 28/4
  • 2 total stops
  • 31h 35m total
  • Sydney to Illinois
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($247 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($39 potential savings vs. average return price).
Search Deals
Average for return flights in February 2026
Search Deals

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 7 February 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

Thu 12/3

10:25-14:41

1 stop20h 16m

Chicago O'Hare Intl

Thu 19/3

07:15-08:35

2 stops33h 20m

$1,155

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 19/3

10:25-08:00

3 stops37h 35m

Chicago O'Hare Intl

Tue 21/4

08:42-07:20

2 stops31h 38m

$1,160

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 5/3

11:20-08:00

3 stops37h 40m

Chicago O'Hare Intl

Wed 18/3

07:15-08:35

3 stops33h 20m

$1,241

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 14/5

09:20-20:04

2 stops49h 44m

Lambert-St Louis

Thu 4/6

07:30-07:20

2 stops32h 50m

$1,276

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 26/2

11:20-09:13

2 stops38h 53m

Chicago O'Hare Intl

Fri 13/3

15:35-08:40

2 stops49h 05m

$1,278

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 22/6

09:20-07:50

2 stops37h 30m

Chicago O'Hare Intl

Sun 19/7

15:40-07:20

1 stop24h 40m

$1,291

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sat 16/5

09:20-14:45

1 stop20h 25m

Chicago O'Hare Intl

Sat 6/6

15:40-07:20

1 stop24h 40m

$1,308

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 23/3

09:40-21:06

2 stops27h 26m

Lambert-St Louis

Mon 30/3

07:03-07:50

2 stops32h 47m

$1,311

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 12/3

10:25-14:41

1 stop20h 16m

Chicago O'Hare Intl

Fri 20/3

20:40-08:35

2 stops43h 55m

$1,331

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 19/2

11:20-19:29

2 stops25h 09m

Lambert-St Louis

Mon 23/2

09:35-09:00

2 stops30h 25m

$1,506

Flights are sorted by cheapest return flights first.

Deals found on 6/2

Showing 1-10 of 25 results
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2
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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 38 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 $816
United Airlines
United Airlines
From $1,265
Air Canada
Air Canada
From $1,085
Air New Zealand
Air New Zealand
From $1,100

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 7 February 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
580 reviews
Check prices

Overall

8.0

Comfort

8.0

Food

7.4

Entertainment

7.4

Boarding

8.2

Crew

8.5

Reviews

1 / 20
8.0
Excellent

David,Jan 2026

AKL - IAH

Couple of spare seats on this flight so people could spread a little. Much better than a full plane
Air New Zealand
8.0
Very Good
580 reviews
Air New Zealand
8.0
Very Good
580 reviews
Check prices

Overall

8.0

Comfort

8.0

Food

7.4

Entertainment

7.4

Boarding

8.2

Crew

8.5

Reviews

1 / 20
8.0
Excellent

David,Jan 2026

AKL - IAH

Couple of spare seats on this flight so people could spread a little. Much better than a full plane
Qantas Airways
7.5
Good
987 reviews
Air New Zealand
8.0
Very Good
580 reviews
Check prices

Overall

8.0

Comfort

8.0

Food

7.4

Entertainment

7.4

Boarding

8.2

Crew

8.5

Reviews

1 / 20
8.0
Excellent

David,Jan 2026

AKL - IAH

Couple of spare seats on this flight so people could spread a little. Much better than a full plane
United Airlines
7.4
Good
9,245 reviews
Air New Zealand
8.0
Very Good
580 reviews
Check prices

Overall

8.0

Comfort

8.0

Food

7.4

Entertainment

7.4

Boarding

8.2

Crew

8.5

Reviews

1 / 20
8.0
Excellent

David,Jan 2026

AKL - IAH

Couple of spare seats on this flight so people could spread a little. Much better than a full plane
American Airlines
7.2
Good
11,248 reviews
Air New Zealand
8.0
Very Good
580 reviews
Check prices

Overall

8.0

Comfort

8.0

Food

7.4

Entertainment

7.4

Boarding

8.2

Crew

8.5

Reviews

1 / 20
8.0
Excellent

David,Jan 2026

AKL - IAH

Couple of spare seats on this flight so people could spread a little. Much better than a full plane
Air Canada
7.1
Good
10,697 reviews
Air New Zealand
8.0
Very Good
580 reviews
Check prices

Overall

8.0

Comfort

8.0

Food

7.4

Entertainment

7.4

Boarding

8.2

Crew

8.5

Reviews

1 / 20
8.0
Excellent

David,Jan 2026

AKL - IAH

Couple of spare seats on this flight so people could spread a little. Much better than a full plane

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, Qantas Airways 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 $71, while return flights cost around $358.

  • How much is a return flight to Illinois?

    A return flight to Illinois will typically cost around $474, however they can be found for as little as $358.

  • Where does the fastest flight to Illinois depart from?

    For those looking to save time traveling to Illinois, Brisbane offers the quickest one-way flight (19 hours 5 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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Find flights to Illinois

Select your preferred flight destination in Illinois from the list below.
Flights to O'Hare Intl
Flights to Midway
Flights to Moline
Flights to Bloomington
Flights to Springfield
Flights to Belleville
Flights to Chicago

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Cheapflights helps you search for flights to Illinois via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets to Illinois?

Cheapflights helps you find that perfect flight to Illinois by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights to Illinois with no change fees?

Certainly. Search results for flights to Illinois shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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Yes! Start tracking prices for Illinois flights today and get alerted when prices change. To subscribe and begin receiving alerts, click the bell icon next to the flight deals above and provide your email address.

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