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$723+ 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 17/3. Fares are subject to change and may not be available on all flights or dates of travel.
— ORD
22 Jan — 29 Jan1
1 adult

Flights to Illinois in 2025

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 17 January 2025.

Return from

$1,146

One-way from

$723

Popular in

December

Cheapest in

March

Average price

$2,090
Qantas Airways
  • Qantas Airways
  • 30/5-12/6
  • 2 total stops
  • 84h 05m total
  • Sydney to Chicago
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Qantas Airways
  • Qantas Airways
  • 17/3
  • 1 total stop
  • 22h 34m total
  • Sydney to Illinois
Search Deals
High demand for flights, 10% potential price rise
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Best time to find cheap flights, 2% potential price drop
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Average for return flights in January 2025
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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 17 January 2025
Explore Illinois
Look for other cheap flights to Chicago
Look for other cheap flights to Moline

Find flight deals to Illinois

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 17 January 2025.

Thu 23/111:15SYD - ORD
1 stop21h 44mQantas Airways
Thu 6/215:20ORD - SYD
1 stop24h 40mQantas Airways
Deal found 16/1$1,143
Wed 5/206:20SYD - ORD
2 stops25h 05mMultiple Airlines
Wed 26/220:25ORD - SYD
1 stop43h 35mMultiple Airlines
Deal found 16/1$1,279
Wed 12/211:20SYD - ORD
3 stops37h 37mAir Canada
Sun 23/207:20ORD - SYD
3 stops33h 15mAir Canada
Deal found 17/1$1,733
Thu 15/511:50SYD - ORD
2 stops26h 06mAir New Zealand
Tue 20/516:20ORD - SYD
2 stops25h 25mAir New Zealand
Deal found 15/1$1,772
Thu 15/511:50SYD - ORD
1 stop35h 50mANA
Tue 20/519:46ORD - SYD
2 stops32h 29mANA
Deal found 15/1$1,789
Mon 10/211:15SYD - STL
1 stop28h 48mAmerican Airlines
Sun 16/215:43STL - SYD
2 stops24h 17mAmerican Airlines
Deal found 17/1$1,854
Mon 3/311:50SYD - STL
2 stops24h 59mUnited Airlines
Mon 10/316:30STL - SYD
2 stops24h 35mUnited Airlines
Deal found 16/1$1,855
Thu 13/211:20SYD - STL
2 stops44h 46mAir Canada
Thu 20/215:50STL - SYD
2 stops48h 45mAir Canada
Deal found 15/1$1,865
Mon 20/114:15SYD - MDW
2 stops25h 05mDelta
Mon 10/212:44MDW - SYD
2 stops26h 51mDelta
Deal found 17/1$1,910
Mon 20/111:05SYD - ORD
2 stops23h 20mDelta
Mon 10/212:15ORD - SYD
2 stops27h 20mDelta
Deal found 17/1$1,910
Thu 23/111:15SYD - ORD
2 stops22h 20mAmerican Airlines
Fri 31/117:35ORD - SYD
2 stops22h 25mAmerican Airlines
Deal found 16/1$1,921
Mon 12/509:25SYD - STL
2 stops27h 08mDelta
Sat 31/507:20STL - SYD
2 stops32h 15mDelta
Deal found 17/1$1,986

Find flights to Illinois within your budget

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 17 January 2025.

Fly from

Any airport

Route

Depart

Return

Price

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Fri 30/5

17:35-19:38

1 stop41h 03m

Chicago O'Hare Intl

Thu 12/6

20:33-06:35

1 stop43h 02m

$1,146

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 5/2

06:20-14:25

2 stops25h 05m

Chicago O'Hare Intl

Wed 26/2

20:25-09:00

1 stop43h 35m

$1,279

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 12/2

11:20-07:57

3 stops37h 37m

Chicago O'Hare Intl

Sun 23/2

07:20-09:35

3 stops33h 15m

$1,733

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 15/5

11:50-22:56

2 stops26h 06m

Chicago O'Hare Intl

Tue 20/5

16:20-08:45

2 stops25h 25m

$1,772

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 15/5

11:50-08:40

1 stop35h 50m

Chicago O'Hare Intl

Tue 20/5

19:46-19:15

2 stops32h 29m

$1,789

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 10/2

11:15-23:03

1 stop28h 48m

Lambert-St Louis

Sun 16/2

15:43-09:00

2 stops24h 17m

$1,854

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 3/3

11:50-19:49

2 stops24h 59m

Lambert-St Louis

Mon 10/3

16:30-09:05

2 stops24h 35m

$1,855

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 13/2

11:20-15:06

2 stops44h 46m

Lambert-St Louis

Thu 20/2

15:50-09:35

2 stops48h 45m

$1,865

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Mon 20/1

14:15-22:20

2 stops25h 05m

Chicago Midway

Mon 10/2

12:44-08:35

2 stops26h 51m

$1,910

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 12/5

09:25-21:33

2 stops27h 08m

Lambert-St Louis

Sat 31/5

07:20-06:35

2 stops32h 15m

$1,986

Flights are sorted by cheapest return flights first.

Deals found on 17/1

Showing 1-10 of 33 results
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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.

Travel insights for flights to Illinois

Get recent, data-driven insights about flights to Illinois including ideal travel times, pricing trends, and more.

How long is the flight to Illinois?

On average, a flight from Sydney to Illinois takes 23 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.

When is the cheapest time to fly to Illinois?

Use this chart to determine the cheapest time to fly return from Sydney to Illinois. Price data was last updated on 25 February 2024.

Users looking for the lowest fares to Illinois should consider flying on Monday at midday, when prices are typically cheapest. Budget-minded travellers will want to avoid Sunday evenings, when prices are usually at their highest.

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 ANA.

Qantas Airways

Qantas Airways

From $646

Air Canada

Air Canada

From $903

ANA

ANA

From $865

United Airlines

United Airlines

From $955

What are the cheapest airlines that fly to Illinois?

The cheapest airlines flying from Sydney to Illinois are Qantas Airways, ANA and Air New Zealand.

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 17 January 2025.
Get a feel of what it's like to fly with Qantas Airways, Air Canada and Air Tahiti Nui to Illinois by reading reviews from past customers. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Overall

8.8

Boarding

8.7

Entertainment

7.3

Food

7.8

Crew

9.1

Comfort

8.1

Reviews

1 / 2

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Air Tahiti Nui
8.8
Very Good
62 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Overall

8.8

Boarding

8.7

Entertainment

7.3

Food

7.8

Crew

9.1

Comfort

8.1

Reviews

1 / 2

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Korean Air
8.5
Very Good
1,034 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Overall

8.8

Boarding

8.7

Entertainment

7.3

Food

7.8

Crew

9.1

Comfort

8.1

Reviews

1 / 2

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

ANA
8.4
Very Good
847 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Overall

8.8

Boarding

8.7

Entertainment

7.3

Food

7.8

Crew

9.1

Comfort

8.1

Reviews

1 / 2

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Japan Airlines
8.3
Very Good
1,448 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Overall

8.8

Boarding

8.7

Entertainment

7.3

Food

7.8

Crew

9.1

Comfort

8.1

Reviews

1 / 2

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Singapore Airlines
8.1
Very Good
1,327 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Overall

8.8

Boarding

8.7

Entertainment

7.3

Food

7.8

Crew

9.1

Comfort

8.1

Reviews

1 / 2

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

  • 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 $156, while return flights cost around $978.

  • How much is a return flight to Illinois?

    A return flight to Illinois will typically cost around $1,463, however they can be found for as little as $608.

  • 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 16 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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