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Cheap flights from Illinois to Sydney from $662

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 30/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SYD
26 Jan — 2 Feb1
1 adult

Cheap flight deals from Illinois to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Illinois (USIL) to Sydney (SYD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 21 January 2025.

Round-trip from

$1,357

One-way from

$662
Qantas Airways
  • Qantas Airways
  • 4/2-10/2
  • 2 total stops
  • 45h 43m total
  • Illinois to Sydney
Search Deals
American Airlines
  • American Airlines
  • 30/1
  • 2 total stops
  • 25h 12m total
  • Illinois to Sydney
Search Deals

Find flight deals from Illinois to Sydney

Cheapest flights from Illinois to Sydney
Explore the most affordable flight options available from Illinois to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 January 2025.

Tue 4/215:22ORD - SYD
1 stop22h 13mQantas Airways
Mon 10/211:15SYD - ORD
1 stop23h 30mQantas Airways
Deal found 20/1$1,357
Mon 17/310:15ORD - SYD
2 stops29h 10mAmerican Airlines
Tue 25/321:25SYD - ORD
1 stop25h 08mAmerican Airlines
Deal found 21/1$1,371
Sun 9/314:13ORD - SYD
1 stop25h 12mBritish Airways
Sun 23/321:25SYD - ORD
1 stop25h 08mBritish Airways
Deal found 20/1$1,378
Sat 25/115:20ORD - SYD
1 stop24h 40mMultiple Airlines
Mon 27/111:50SYD - ORD
1 stop20h 39mMultiple Airlines
Deal found 21/1$1,414
Fri 9/507:00ORD - SYD
2 stops45h 15mANA
Fri 23/511:50SYD - ORD
2 stops47h 35mANA
Deal found 21/1$1,475
Fri 7/312:49MDW - SYD
3 stops54h 41mMultiple Airlines
Fri 14/306:15SYD - MDW
3 stops39h 16mMultiple Airlines
Deal found 21/1$1,635
Tue 11/216:55ORD - SYD
2 stops26h 35mFiji Airways
Tue 24/613:15SYD - ORD
2 stops22h 08mFiji Airways
Deal found 21/1$1,848
Sat 23/813:30STL - SYD
2 stops50h 50mAir Canada
Mon 1/909:20SYD - STL
2 stops44h 56mAir Canada
Deal found 21/1$1,965
Thu 20/314:22STL - SYD
2 stops26h 38mAmerican Airlines
Fri 28/311:15SYD - STL
1 stop27h 54mAmerican Airlines
Deal found 21/1$1,990
Sun 9/214:49STL - SYD
2 stops31h 46mMultiple Airlines
Sat 15/206:00SYD - STL
2 stops30h 29mMultiple Airlines
Deal found 21/1$2,173
Sun 11/514:00MDW - SYD
2 stops25h 35mDelta
Wed 28/509:25SYD - MDW
2 stops27h 21mDelta
Deal found 21/1$2,349
Thu 20/310:55STL - SYD
1 stop28h 05mUnited Airlines
Fri 28/312:10SYD - STL
1 stop21h 43mUnited Airlines
Deal found 21/1$2,488

Find flights from Illinois to Sydney within your budget

Customise your flight search to find flights from Illinois to Sydney 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 21 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 4/2

15:22-06:35

1 stop22h 13m

Sydney Kingsford Smith

Mon 10/2

11:15-17:45

1 stop23h 30m

$1,357

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 17/3

12:05-06:35

1 stop26h 30m

Sydney Kingsford Smith

Tue 25/3

21:25-06:33

1 stop25h 08m

$1,371

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 9/3

14:13-07:25

1 stop25h 12m

Sydney Kingsford Smith

Sun 23/3

21:25-06:33

1 stop25h 08m

$1,378

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 25/1

15:20-09:00

1 stop24h 40m

Sydney Kingsford Smith

Mon 27/1

11:50-15:29

1 stop20h 39m

$1,414

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Fri 7/3

12:49-12:30

3 stops54h 41m

Sydney Kingsford Smith

Fri 14/3

06:15-05:31

3 stops39h 16m

$1,635

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 20/2

11:25-13:00

2 stops32h 35m

Sydney Kingsford Smith

Thu 20/3

14:00-19:29

2 stops21h 29m

$1,837

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 11/2

16:55-12:30

2 stops26h 35m

Sydney Kingsford Smith

Tue 24/6

13:15-20:23

2 stops22h 08m

$1,848

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Tue 17/6

13:30-07:20

2 stops50h 50m

Sydney Kingsford Smith

Tue 1/7

09:20-15:16

2 stops44h 56m

$1,966

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 20/3

15:48-09:00

2 stops25h 12m

Sydney Kingsford Smith

Fri 28/3

11:15-19:29

2 stops24h 14m

$1,990

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 4/2

07:20-09:35

3 stops33h 15m

Sydney Kingsford Smith

Wed 19/2

11:20-07:57

2 stops37h 37m

$1,994

Flights are sorted by cheapest return flights first.

Deals found on 21/1

Showing 1-10 of 47 results
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Best time to book a flight from Illinois to Sydney

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

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

What is the cheapest month to book a flight from Illinois to Sydney?

Currently, May is the cheapest month in which you can book a flight from Illinois to Sydney (average of $129). Flying from Illinois to Sydney in October is currently the most expensive (average of $171). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Find hourly flight availability from Illinois to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 January 2025.

When flying from Illinois to Sydney, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Sydney by month

Plan your trip to Sydney by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sydney ranges from 50.0 - 130.0 inches per month. March is typically the wettest month, when rainfall can reach 130.0 mm. September is typically the driest time to visit Sydney when rainfall is around 50.0 mm.

Temperature in Sydney by month

Plan your trip to Sydney by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sydney, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 22.0 C. Travellers hoping to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 11.0 C).

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. 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 Sydney. Reviews last updated 21 January 2025.
Peruse reviews from past customers who have flown with ANA, American Airlines and Qantas Airways from Illinois to Sydney to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Entertainment

7.3

Overall

8.8

Crew

9.1

Boarding

8.7

Comfort

8.1

Food

7.8

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

Entertainment

7.3

Overall

8.8

Crew

9.1

Boarding

8.7

Comfort

8.1

Food

7.8

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
1,039 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Entertainment

7.3

Overall

8.8

Crew

9.1

Boarding

8.7

Comfort

8.1

Food

7.8

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

Entertainment

7.3

Overall

8.8

Crew

9.1

Boarding

8.7

Comfort

8.1

Food

7.8

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.

Fiji Airways
8.1
Very Good
188 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Entertainment

7.3

Overall

8.8

Crew

9.1

Boarding

8.7

Comfort

8.1

Food

7.8

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.

Delta
8.0
Very Good
8,521 reviews
Air Tahiti Nui
8.8
Very Good
62 reviews
Check prices

Entertainment

7.3

Overall

8.8

Crew

9.1

Boarding

8.7

Comfort

8.1

Food

7.8

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.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Sydney. 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 into for flights to Sydney from Illinois?

    Located just 7.5 km from the city centre, Sydney Kingsford Smith (SYD) is the airport most travelers will use when flying to Sydney from Illinois.

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

    One-way options have recently been found by users for as low as $662 on American Airlines. Other airlines that offer cheap prices include Qantas Airways from $696 and Fiji Airways from $907 one-way.

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

    When deciding which route to take from Illinois to Sydney, consider Chicago O'Hare Intl - Sydney Kingsford Smith, Chicago Midway - Sydney Kingsford Smith or Lambert-St Louis - Sydney Kingsford Smith, as they are the most popular.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Illinois to Sydney?

    Currently, May is the cheapest month in which you can book a flight from Illinois to Sydney (average of $129). Flying from Illinois to Sydney in October is currently the most expensive (average of $171). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Illinois?

Book flights to Illinois if you plan to visit one of these locations
Parramatta
Wollongong
Penrith
Katoomba
Randwick
Coogee
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Bondi Beach
Terrigal
Lithgow
Leura
Swansea

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Top 3 airlines flying from Illinois to Sydney

Discover the top 3 airlines that operate flights from Illinois to Sydney. 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 21 January 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,458Average$1,555FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,545Average$1,889FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,804Average$2,308FlexibilityNo cancel feeOn-time69%
Search United Airlines 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 Illinois to Sydney?

When you search for this flight from Illinois to Sydney, 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 Illinois to Sydney?

Millions of users choose and trust Cheapflights to book the best flight deals from Illinois to Sydney for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

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

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

Of course! You can now track prices for flights from Illinois to Sydney and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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