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$893+ 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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
— ORD
4 Jul — 11 Jul1
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 4 June 2026.

Thu 29/1011:15
SYD
-
ORD
1 stop34h 46m
American Airlines
Sun 1/1110:15
ORD
-
SYD
1 stop26h 55m
American Airlines
Deal found 3/6$1,422
Mon 2/1111:15
SYD
-
ORD
1 stop22h 37m
American Airlines
Mon 9/1107:00
ORD
-
SYD
1 stop33h 00m
American Airlines
Deal found 2/6$1,430
Wed 24/617:50
SYD
-
STL
2 stops29h 41m
American Airlines
Tue 18/810:16
STL
-
SYD
2 stops29h 49m
American Airlines
Deal found 2/6$1,431
Wed 24/617:50
SYD
-
STL
1 stop21h 06m
American Airlines
Sun 16/806:00
STL
-
SYD
1 stop34h 30m
American Airlines
Deal found 2/6$1,441
Mon 22/610:20
SYD
-
STL
1 stop22h 57m
United Airlines
Mon 17/813:36
STL
-
SYD
2 stops26h 19m
United Airlines
Deal found 2/6$1,447
Wed 8/709:15
SYD
-
STL
2 stops30h 26m
Delta
Mon 20/714:30
STL
-
SYD
2 stops25h 20m
Delta
Deal found 31/5$1,450
Mon 2/1110:40
SYD
-
MDW
2 stops23h 10m
Delta
Wed 11/1113:05
MDW
-
SYD
2 stops26h 25m
Delta
Deal found 2/6$1,455
Mon 2/1110:40
SYD
-
ORD
2 stops23h 09m
Delta
Tue 10/1115:50
ORD
-
SYD
2 stops23h 40m
Delta
Deal found 2/6$1,455
Sun 21/609:10
SYD
-
STL
1 stop29h 46m
American Airlines
Wed 19/817:11
STL
-
SYD
2 stops22h 54m
American Airlines
Deal found 2/6$1,490
Sun 1/1111:15
SYD
-
ORD
1 stop21h 40m
American Airlines
Wed 11/1115:00
ORD
-
SYD
1 stop25h 00m
American Airlines
Deal found 2/6$1,500
Sat 20/617:50
SYD
-
STL
1 stop21h 06m
American Airlines
Wed 19/810:16
STL
-
SYD
2 stops29h 49m
American Airlines
Deal found 2/6$1,501
Thu 5/1111:15
SYD
-
ORD
1 stop22h 37m
American Airlines
Thu 12/1113:49
ORD
-
SYD
1 stop23h 36m
American Airlines
Deal found 2/6$1,511

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 4 June 2026
Explore Illinois
Look for other cheap flights to Chicago
Look for other cheap flights to Moline
Look for other cheap flights to Bloomington
Look for other cheap flights to Springfield
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 4 June 2026.

Return from

$1,422

One-way from

$892

Popular in

December

Cheapest in

August

Average price

$1,817
American Airlines
  • American Airlines
  • 29/10-1/11
  • 2 total stops
  • 61h 41m total
  • Sydney to Chicago
Search Deals
Air Canada
  • Air Canada
  • 30/7
  • 2 total stops
  • 48h 22m total
  • Sydney to Illinois
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($48 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($19 potential savings vs. average return price).
Search Deals
Average for return flights in June 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 4 June 2026.
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

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 8/7

09:15-00:41

2 stops30h 26m

Lambert-St Louis

Mon 20/7

14:30-06:50

2 stops25h 20m

$1,450

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 10/8

10:20-23:57

2 stops28h 37m

Lambert-St Louis

Fri 4/9

08:42-06:55

1 stop31h 13m

$1,520

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 7/8

09:20-20:22

2 stops26h 02m

Lambert-St Louis

Tue 11/8

08:55-07:20

2 stops31h 25m

$1,690

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 22/7

09:10-16:40

2 stops22h 30m

Lambert-St Louis

Sun 26/7

06:37-07:05

1 stop33h 28m

$1,690

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 17/11

11:50-18:38

1 stop23h 48m

Lambert-St Louis

Tue 1/12

15:15-09:05

2 stops24h 50m

$1,717

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 7/8

09:10-22:59

1 stop28h 49m

Lambert-St Louis

Tue 11/8

17:11-07:05

2 stops22h 54m

$1,736

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 25/6

09:30-23:57

2 stops29h 27m

Lambert-St Louis

Thu 20/8

08:42-06:55

1 stop31h 13m

$1,922

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 25/6

09:30-23:57

2 stops29h 27m

Lambert-St Louis

Fri 21/8

08:42-06:55

1 stop31h 13m

$1,922

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 8/7

09:30-23:57

2 stops29h 27m

Lambert-St Louis

Mon 20/7

13:38-06:55

2 stops26h 17m

$1,971

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Fri 17/7

09:15-18:18

2 stops24h 03m

Chicago Midway

Wed 30/9

13:14-06:50

2 stops26h 36m

$1,988

Flights are sorted by cheapest return flights first.

Deals found on 4/6

Showing 1-10 of 30 resultsSorted by cheapest first
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 20 hours 43 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 $1,234
United Airlines
United Airlines
From $1,227
Air Canada
Air Canada
From $999
Air New Zealand
Air New Zealand
From $1,073

What are the cheapest airlines that fly to Illinois?

The cheapest airlines flying from Sydney to Illinois are Air Canada, Qantas Airways 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).

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 10 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

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 4 June 2026.
Read through reviews of airlines serving the United States, such as ANA,Air New Zealand, andQantas Airways. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
ANA
8.3
Very Good
1,220 reviews
Check prices

Food

7.7

Entertainment

8.0

Overall

8.3

Crew

8.7

Comfort

8.2

Boarding

8.5

Reviews

1 / 20
4.0
Okay

PeggyLee,June 2026

BKK - NRT

It was unexpectedly below the expectation from the overall atmosphere of older plane, older seats, and most disappointment probably the meals. Will not be booking ANA again.
ANA
8.3
Very Good
1,220 reviews
ANA
8.3
Very Good
1,220 reviews
Check prices

Food

7.7

Entertainment

8.0

Overall

8.3

Crew

8.7

Comfort

8.2

Boarding

8.5

Reviews

1 / 20
4.0
Okay

PeggyLee,June 2026

BKK - NRT

It was unexpectedly below the expectation from the overall atmosphere of older plane, older seats, and most disappointment probably the meals. Will not be booking ANA again.
Air New Zealand
8.0
Very Good
645 reviews
ANA
8.3
Very Good
1,220 reviews
Check prices

Food

7.7

Entertainment

8.0

Overall

8.3

Crew

8.7

Comfort

8.2

Boarding

8.5

Reviews

1 / 20
4.0
Okay

PeggyLee,June 2026

BKK - NRT

It was unexpectedly below the expectation from the overall atmosphere of older plane, older seats, and most disappointment probably the meals. Will not be booking ANA again.
Qantas Airways
7.5
Good
1,042 reviews
ANA
8.3
Very Good
1,220 reviews
Check prices

Food

7.7

Entertainment

8.0

Overall

8.3

Crew

8.7

Comfort

8.2

Boarding

8.5

Reviews

1 / 20
4.0
Okay

PeggyLee,June 2026

BKK - NRT

It was unexpectedly below the expectation from the overall atmosphere of older plane, older seats, and most disappointment probably the meals. Will not be booking ANA again.
United Airlines
7.4
Good
9,772 reviews
ANA
8.3
Very Good
1,220 reviews
Check prices

Food

7.7

Entertainment

8.0

Overall

8.3

Crew

8.7

Comfort

8.2

Boarding

8.5

Reviews

1 / 20
4.0
Okay

PeggyLee,June 2026

BKK - NRT

It was unexpectedly below the expectation from the overall atmosphere of older plane, older seats, and most disappointment probably the meals. Will not be booking ANA again.
Air Canada
7.1
Good
11,126 reviews
ANA
8.3
Very Good
1,220 reviews
Check prices

Food

7.7

Entertainment

8.0

Overall

8.3

Crew

8.7

Comfort

8.2

Boarding

8.5

Reviews

1 / 20
4.0
Okay

PeggyLee,June 2026

BKK - NRT

It was unexpectedly below the expectation from the overall atmosphere of older plane, older seats, and most disappointment probably the meals. Will not be booking ANA again.

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 $129, while return flights cost around $204.

  • How much is a return flight to Illinois?

    A return flight to Illinois will typically cost around $508, however they can be found for as little as $204.

  • 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 28 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
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Flights to Moline
Flights to Bloomington
Flights to Springfield
Flights to Belleville
Flights to Chicago

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How does Cheapflights help users find flights to Illinois?

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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