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$976+ 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 27/4. Fares are subject to change and may not be available on all flights or dates of travel.
— ORD
30 Jan — 6 Feb1
1 adult
1 adult, Economy, 0 bags

Flights to Illinois in 2025

Enter your travel dates to find the best prices.

Best flights to Illinois
Discover carefully curated flight deals to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 31 December 2025.

Mon 19/116:00SYD - ORD
2 stops42h 03mAir Canada
Tue 3/215:35ORD - SYD
1 stop25h 00mAir Canada
Deal found 30/12$1,538
Sun 3/511:55SYD - ORD
2 stops24h 13mAir New Zealand
Wed 6/516:00ORD - SYD
2 stops25h 45mAir New Zealand
Deal found 30/12$1,681
Mon 19/110:40SYD - MDW
2 stops23h 49mDelta
Mon 2/213:26MDW - SYD
2 stops26h 04mDelta
Deal found 30/12$1,729
Mon 19/111:20SYD - ORD
1 stop20h 30mUnited Airlines
Mon 2/218:29ORD - SYD
1 stop21h 46mUnited Airlines
Deal found 30/12$1,734
Fri 13/206:05SYD - STL
2 stops26h 23mQantas Airways
Fri 20/206:38STL - SYD
1 stop33h 22mQantas Airways
Deal found 30/12$2,036
Fri 13/214:05SYD - STL
1 stop22h 24mAmerican Airlines
Fri 20/216:13STL - SYD
1 stop21h 42mAmerican Airlines
Deal found 30/12$2,124
Fri 13/211:45SYD - STL
3 stops28h 14mMultiple Airlines
Fri 20/208:41STL - SYD
3 stops31h 04mMultiple Airlines
Deal found 30/12$2,314
Mon 19/116:00SYD - ORD
2 stops39h 55mAir Canada
Mon 2/215:35ORD - SYD
1 stop25h 00mAir Canada
Deal found 30/12$1,572
Wed 18/211:20SYD - ORD
2 stops40h 46mAir Canada
Sun 22/220:40ORD - SYD
2 stops43h 55mAir Canada
Deal found 30/12$1,655
Sat 16/511:55SYD - ORD
2 stops24h 36mAir New Zealand
Sat 6/616:40ORD - SYD
2 stops25h 05mAir New Zealand
Deal found 30/12$1,989
Sat 14/211:20SYD - ORD
1 stop20h 21mAir Canada
Sat 21/215:35ORD - SYD
1 stop25h 00mAir Canada
Deal found 31/12$1,672
Fri 12/609:15SYD - MDW
2 stops24h 16mDelta
Sun 12/714:00MDW - SYD
2 stops25h 35mDelta
Deal found 29/12$2,145
Thu 19/211:20SYD - STL
1 stop29h 39mQantas Airways
Mon 23/218:18STL - SYD
2 stops25h 42mQantas Airways
Deal found 29/12$2,323
Thu 19/211:20SYD - STL
2 stops22h 38mAir Canada
Mon 23/208:41STL - SYD
2 stops31h 54mAir Canada
Deal found 29/12$1,759
Sat 2/509:15SYD - MDW
2 stops24h 30mDelta
Sun 10/513:05MDW - SYD
2 stops26h 30mDelta
Deal found 31/12$2,145
Thu 19/211:50SYD - STL
1 stop20h 48mUnited Airlines
Mon 23/216:39STL - SYD
1 stop21h 21mUnited Airlines
Deal found 29/12$2,520
Sun 19/409:15SYD - MDW
2 stops24h 30mDelta
Sun 26/413:10MDW - SYD
2 stops26h 25mDelta
Deal found 31/12$2,145
Fri 13/211:20SYD - STL
2 stops45h 09mAir Canada
Fri 20/216:05STL - SYD
2 stops48h 30mAir Canada
Deal found 30/12$1,808
Fri 1/509:15SYD - MDW
2 stops23h 39mDelta
Wed 20/513:05MDW - SYD
2 stops26h 30mDelta
Deal found 29/12$2,151
Mon 26/111:20SYD - ORD
1 stop20h 21mAir Canada
Thu 29/115:35ORD - SYD
1 stop25h 00mAir Canada
Deal found 30/12$1,871
Sat 9/509:15SYD - MDW
2 stops27h 30mDelta
Sat 23/514:00MDW - SYD
2 stops25h 35mDelta
Deal found 31/12$2,221
Thu 5/210:40SYD - MDW
2 stops24h 15mDelta
Wed 18/213:49MDW - SYD
2 stops25h 41mDelta
Deal found 30/12$2,371
Thu 12/210:40SYD - MDW
2 stops24h 05mDelta
Thu 19/212:45MDW - SYD
2 stops25h 05mDelta
Deal found 29/12$2,451
Sat 14/214:15SYD - MDW
2 stops25h 16mDelta
Sat 21/213:28MDW - SYD
2 stops26h 02mDelta
Deal found 31/12$2,523

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 31 December 2025
Explore Illinois
Look for other cheap flights to Chicago
Look for other cheap flights to St. Louis

Find flight deals to Illinois

Find the latest flights to Illinois in 2025, 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 31 December 2025.

Return from

$1,517

One-way from

$929

Popular in

December

Cheapest in

March

Average price

$2,045
Air Canada
  • Air Canada
  • 5/2-18/2
  • 3 total stops
  • 52h 57m total
  • Sydney to Chicago
Search Deals
15/1
  • 15/1
  • 3 total stops
  • 49h 39m total
  • Sydney to Illinois
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($350 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($56 potential savings vs. average return price).
Search Deals
Average for return flights in December 2025
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 31 December 2025.
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

Mon 19/1

16:00-17:03

2 stops42h 03m

Chicago O'Hare Intl

Tue 3/2

15:35-09:35

1 stop25h 00m

$1,538

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 19/1

16:00-14:55

2 stops39h 55m

Chicago O'Hare Intl

Mon 2/2

15:35-09:35

1 stop25h 00m

$1,572

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 18/2

11:20-11:06

2 stops40h 46m

Chicago O'Hare Intl

Sun 22/2

20:40-09:35

2 stops43h 55m

$1,655

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sat 14/2

11:20-14:41

1 stop20h 21m

Chicago O'Hare Intl

Sat 21/2

15:35-09:35

1 stop25h 00m

$1,672

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sun 3/5

11:55-21:08

2 stops24h 13m

Chicago O'Hare Intl

Wed 6/5

16:00-08:45

2 stops25h 45m

$1,681

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Mon 19/1

10:40-17:29

2 stops23h 49m

Chicago Midway

Mon 2/2

13:26-08:30

2 stops26h 04m

$1,729

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 19/1

11:20-14:50

1 stop20h 30m

Chicago O'Hare Intl

Mon 2/2

18:29-09:15

1 stop21h 46m

$1,734

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 19/2

11:20-16:58

2 stops22h 38m

Lambert-St Louis

Mon 23/2

08:41-09:35

2 stops31h 54m

$1,759

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 13/2

11:20-15:29

2 stops45h 09m

Lambert-St Louis

Fri 20/2

16:05-09:35

2 stops48h 30m

$1,808

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 26/1

11:20-14:41

1 stop20h 21m

Chicago O'Hare Intl

Thu 29/1

15:35-09:35

1 stop25h 00m

$1,871

Flights are sorted by cheapest return flights first.

Deals found on 29/12

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 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, Air Canada and United Airlines.

Qantas Airways
Qantas Airways
From $946
United Airlines
United Airlines
From $1,318
Air Canada
Air Canada
From $1,152
Air New Zealand
Air New Zealand
From $1,146

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 31 December 2025.
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
563 reviews
Check prices

Boarding

8.2

Comfort

8.0

Food

7.4

Entertainment

7.4

Overall

8.0

Crew

8.5

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
563 reviews
Air New Zealand
8.0
Very Good
563 reviews
Check prices

Boarding

8.2

Comfort

8.0

Food

7.4

Entertainment

7.4

Overall

8.0

Crew

8.5

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
960 reviews
Air New Zealand
8.0
Very Good
563 reviews
Check prices

Boarding

8.2

Comfort

8.0

Food

7.4

Entertainment

7.4

Overall

8.0

Crew

8.5

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
9,123 reviews
Air New Zealand
8.0
Very Good
563 reviews
Check prices

Boarding

8.2

Comfort

8.0

Food

7.4

Entertainment

7.4

Overall

8.0

Crew

8.5

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
11,069 reviews
Air New Zealand
8.0
Very Good
563 reviews
Check prices

Boarding

8.2

Comfort

8.0

Food

7.4

Entertainment

7.4

Overall

8.0

Crew

8.5

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
10,571 reviews
Air New Zealand
8.0
Very Good
563 reviews
Check prices

Boarding

8.2

Comfort

8.0

Food

7.4

Entertainment

7.4

Overall

8.0

Crew

8.5

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, 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 $49, while return flights cost around $631.

  • How much is a return flight to Illinois?

    A return flight to Illinois will typically cost around $839, however they can be found for as little as $631.

  • 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 24 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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