Find flights
When to book
Airlines
FAQs

Cheap flights from Sydney to Illinois from $706

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 26/5. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ORD
19 Apr — 26 Apr1
1 adult

Cheap flight deals from Sydney to Illinois

Keep the following information in mind while searching for Sydney to Illinois flight deals. Data was last updated 14 April 2025.

Round-trip from

$1,442

One-way from

$706

Popular in

December

Cheapest in

March

Average price

$1,332
28/5-4/6
  • 28/5-4/6
  • 4 total stops
  • 58h 13m total
  • Sydney to Illinois
Search Deals
26/5
  • 26/5
  • 2 total stops
  • 32h 27m total
  • Sydney to Illinois
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($519 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($114 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Sydney to Illinois

Cheapest flights from Sydney to Illinois
Explore the most affordable flight options available from Sydney to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 April 2025.

Wed 28/513:15SYD - ORD
2 stops32h 27mMultiple Airlines
Wed 4/618:59ORD - SYD
2 stops25h 46mMultiple Airlines
Deal found 13/4$1,442
Mon 7/717:45SYD - ORD
1 stop20h 58mQantas Airways
Wed 30/708:50ORD - SYD
2 stops32h 50mQantas Airways
Deal found 14/4$1,922
Thu 31/711:50SYD - ORD
2 stops27h 25mAir New Zealand
Fri 8/815:54ORD - SYD
2 stops25h 51mAir New Zealand
Deal found 13/4$1,986
Wed 28/508:55SYD - STL
2 stops29h 09mJapan Airlines
Wed 4/606:52STL - SYD
2 stops32h 28mJapan Airlines
Deal found 12/4$2,065
Mon 2/609:30SYD - ORD
1 stop22h 26mUnited Airlines
Sun 15/612:51ORD - SYD
1 stop27h 09mUnited Airlines
Deal found 13/4$2,068
Mon 18/810:20SYD - STL
1 stop21h 25mUnited Airlines
Sat 8/1115:15STL - SYD
2 stops46h 45mUnited Airlines
Deal found 13/4$2,090
Tue 8/710:10SYD - ORD
1 stop43h 15mCathay Pacific
Thu 17/716:00ORD - SYD
1 stop27h 50mCathay Pacific
Deal found 14/4$2,098
Mon 2/609:25SYD - MDW
2 stops23h 11mDelta
Sun 15/612:44MDW - SYD
2 stops26h 51mDelta
Deal found 13/4$2,104
Mon 16/609:25SYD - ORD
2 stops23h 56mDelta
Mon 14/710:35ORD - SYD
2 stops29h 00mDelta
Deal found 12/4$2,104
Sat 20/909:20SYD - ORD
1 stop20h 35mAir Canada
Thu 25/915:40ORD - SYD
1 stop24h 40mAir Canada
Deal found 13/4$2,122
Sat 11/1010:20SYD - STL
2 stops49h 37mMultiple Airlines
Sat 25/1016:40STL - SYD
2 stops23h 55mMultiple Airlines
Deal found 12/4$2,141
Sat 11/1010:20SYD - STL
3 stops49h 37mAir Canada
Sat 25/1016:40STL - SYD
2 stops23h 55mAir Canada
Deal found 12/4$2,144

Cheapflights Fare Finder

Customise your flight search to find flights from Sydney to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 14 April 2025.
Use the filters below to find and compare flights from Sydney to Illinois that are best for you.

Fly from

Sydney

Fly to

Illinois

Route

Depart

Return

Price

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 28/5

13:15-06:42

2 stops32h 27m

Chicago O'Hare Intl

Wed 4/6

18:59-11:45

2 stops25h 46m

$1,442

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 7/7

17:45-23:43

1 stop20h 58m

Chicago O'Hare Intl

Wed 30/7

08:50-08:40

2 stops32h 50m

$1,922

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 31/7

11:50-00:15

2 stops27h 25m

Chicago O'Hare Intl

Fri 8/8

15:54-08:45

2 stops25h 51m

$1,986

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 28/5

08:55-23:04

2 stops29h 09m

Lambert-St Louis

Wed 4/6

06:52-06:20

2 stops32h 28m

$2,065

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 2/6

09:30-16:56

1 stop22h 26m

Chicago O'Hare Intl

Sun 15/6

12:51-07:00

1 stop27h 09m

$2,068

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 8/7

10:10-14:25

1 stop43h 15m

Chicago O'Hare Intl

Thu 17/7

16:00-10:50

1 stop27h 50m

$2,098

SydneyChicago

SYD - MDW

SYDMDW

Sydney Kingsford Smith

Mon 2/6

09:25-17:36

2 stops23h 11m

Chicago Midway

Sun 15/6

12:44-06:35

2 stops26h 51m

$2,104

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 16/6

09:25-18:21

2 stops23h 56m

Chicago O'Hare Intl

Mon 14/7

10:35-06:35

2 stops29h 00m

$2,104

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sat 20/9

09:20-14:55

1 stop20h 35m

Chicago O'Hare Intl

Thu 25/9

15:40-07:20

1 stop24h 40m

$2,122

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 1/7

20:55-10:03

2 stops52h 08m

Chicago O'Hare Intl

Tue 22/7

17:00-19:15

2 stops35h 15m

$2,225

Flights are sorted by cheapest return flights first.

Deals found on 13/4

Showing 1-10 of 38 results
1
2
3
4

Best time to book a flight from Sydney to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Sydney 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 from Sydney to Illinois

What is the cheapest time of day to fly from SYD to IL?

Find hourly flight availability from Sydney to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 14 April 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Sydney to Illinois as you normally would.

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 inches 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 14 April 2025.
To help decide which airline to fly from Sydney to Illinois, see what other customers have to say about Air Tahiti Nui, Japan Airlines and ANA. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Comfort

8.1

Overall

8.8

Boarding

8.7

Entertainment

7.3

Crew

9.1

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

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

Comfort

8.1

Overall

8.8

Boarding

8.7

Entertainment

7.3

Crew

9.1

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

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
1,440 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Comfort

8.1

Overall

8.8

Boarding

8.7

Entertainment

7.3

Crew

9.1

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

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
8.3
Very Good
840 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Comfort

8.1

Overall

8.8

Boarding

8.7

Entertainment

7.3

Crew

9.1

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

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
1,288 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Comfort

8.1

Overall

8.8

Boarding

8.7

Entertainment

7.3

Crew

9.1

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

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.
Delta
8.0
Very Good
7,914 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Comfort

8.1

Overall

8.8

Boarding

8.7

Entertainment

7.3

Crew

9.1

Food

7.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

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.

Related info for your journey

Find useful and relevant information for your journey from Sydney to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Sydney to Illinois?

    If you book a flight to Illinois from Sydney, you will be flying from Kingsford Smith, which is the city’s only airport. Sydney Kingsford Smith (SYD) is located 7.5 km from the centre of Sydney.

  • What are the cheapest airlines to fly from Sydney to Illinois one-way?

    The cheapest airline one-way is Cathay Pacific, with whom users have recently found tickets for as low as $1,270. However, be on the lookout for offers from United Airlines and Delta, as they are both options that can get you from Sydney to Illinois for a low price.

  • What are the most popular routes from Sydney to Illinois?

    The most popular route from Sydney to Illinois is Sydney Kingsford Smith - Chicago O'Hare Intl. You may also consider Sydney Kingsford Smith - Chicago Midway or Sydney Kingsford Smith - Lambert-St Louis.

  • Can I find deals for flights from Sydney to Illinois that include hotel bookings?

    Yes. In addition to deals on Sydney to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Sydney to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sydney to Illinois.

  • Can I find deals for business class flights from Sydney to Illinois?

    Yes. Cheapflights offers flight deals from Sydney to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Sydney to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Sydney to Los Angeles flights
Sydney to San Francisco flights
Sydney to John F Kennedy Intl flights
Sydney to Dallas/Fort Worth flights
Sydney to Newark flights
Sydney to Honolulu flights
Sydney to LaGuardia flights
Sydney to Ontario flights
Sydney to Santa Ana flights
Sydney to Boston flights
Sydney to Seattle flights
Sydney to Miami flights
Sydney to Atlanta flights
Sydney to Burbank flights
Sydney to Worcester flights
Sydney to Hobby flights
Sydney to Las Vegas flights
Sydney to San Jose flights
Sydney to Oakland flights
Sydney to Orlando flights
Sydney to Providence flights
Sydney to George Bush Intcntl flights
Sydney to Dulles Intl flights
Sydney to O'Hare Intl flights
Sydney to San Diego flights
Sydney to Minneapolis flights
Sydney to Baltimore flights
Sydney to Sky Harbor Intl flights
Sydney to Denver flights
Sydney to Midway flights
Sydney to Reagan-National flights
Sydney to Kansas City flights
Sydney to Fort Lauderdale flights
Sydney to Cincinnati flights
Sydney to Portland flights
Sydney to Long Beach flights
Sydney to Charlotte flights
Sydney to Nashville flights
Sydney to Salt Lake City flights
Sydney to Detroit flights
Sydney to Jacksonville flights
Sydney to Tampa flights
Sydney to Philadelphia flights
Coolangatta to Los Angeles flights
Sydney to Austin flights
Sydney to Kailua-Kona flights
Sydney to New Orleans flights

Top 7 airlines flying from Sydney to Illinois

Discover the top 7 airlines that operate flights from Sydney to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 14 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,051Average$1,531FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,333Average$1,776FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapest$1,561Average$1,740FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$1,608Average$2,412FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
ANACheapest$1,705Average$2,179FlexibilityNo cancel feeOn-time80%
Search ANA flights
Virgin AustraliaCheapest$1,757Average$2,738FlexibilityNo cancel feeOn-time80%
Search Virgin Australia flights
DeltaCheapest$1,851Average$1,985FlexibilityNo cancel feeOn-timeN/A
Search Delta flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Sydney to Illinois?

When you search for this flight from Sydney to Illinois, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Sydney to Illinois.

Can Cheapflights find flights from Sydney to Illinois with no change fees?

Yes! Cheapflights helps users easily find flights from Sydney to Illinois with no change fees.

Can Cheapflights notify me if prices for flights from Sydney to Illinois become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2025 Cheapflights