Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Illinois to Sydney from $536

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Sydney departing on 3/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Illinois to Sydney

Cheap round-trip flights

Enter your travel dates to find the best prices.
Qantas Airways Logo
8:20 pm - 9:00 amORD-SYD
43h 40m1 stop
Qantas Airways Logo
7:05 am - 2:45 pmSYD-ORD
24h 40m2 stops
$988Qantas Airways
Find Deal
Tue, Nov 25 - Sat, Feb 28
Qantas Airways Logo
2:15 pm - 9:00 amORD-SYD
25h 45m1 stop
Qantas Airways Logo
7:05 am - 2:57 pmSYD-ORD
24h 52m2 stops
$990Qantas Airways
Find Deal
Fri, Jan 23 - Wed, Jan 28
Multiple Airlines Logo
12:59 pm - 9:00 amORD-SYD
27h 01m2 stops
Multiple Airlines Logo
5:45 pm - 12:13 amSYD-ORD
23h 28m1 stop
$1,037Multiple Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 15
Multiple Airlines Logo
6:11 am - 9:00 amORD-SYD
33h 49m2 stops
Multiple Airlines Logo
5:45 pm - 3:12 pmSYD-ORD
38h 27m2 stops
$1,062Multiple Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 15
Fiji Airways Logo
5:11 pm - 12:35 pmORD-SYD
26h 24m2 stops
Fiji Airways Logo
2:00 pm - 9:35 pmSYD-ORD
24h 35m2 stops
$1,109Fiji Airways
Find Deal
Sat, Feb 14 - Sat, Feb 21
ANA Logo
5:25 pm - 10:30 amORD-SYD
25h 05m1 stop
ANA Logo
11:50 am - 5:05 amSYD-ORD
32h 15m2 stops
$1,144ANA
Find Deal
Mon, Mar 9 - Fri, May 8
ANA Logo
7:35 pm - 8:15 pmORD-SYD
32h 40m2 stops
ANA Logo
11:50 am - 5:05 amSYD-ORD
32h 15m2 stops
$1,148ANA
Find Deal
Mon, Mar 9 - Fri, May 8
Fiji Airways Logo
5:04 pm - 12:35 pmSTL-SYD
26h 31m2 stops
Fiji Airways Logo
2:00 pm - 7:29 pmSYD-STL
22h 29m2 stops
$1,206Fiji Airways
Find Deal
Thu, Jan 29 - Tue, Feb 10
Air Canada Logo
10:35 am - 8:35 amORD-SYD
30h 00m2 stops
Air Canada Logo
9:20 am - 2:43 pmSYD-ORD
20h 23m1 stop
$1,283Air Canada
Find Deal
Wed, Mar 25 - Mon, Apr 6
Air Canada Logo
12:50 pm - 9:35 amORD-SYD
27h 45m2 stops
Air Canada Logo
10:20 am - 8:00 amSYD-ORD
37h 40m3 stops
$1,290Air Canada
Find Deal
Sun, Mar 1 - Tue, Mar 10

Qantas Airways flights from Illinois to Sydney

Our best Qantas Airways deals on Illinois to Sydney flight tickets
Qantas Airways
Nov 25
ORD8:20 pmChicago O'Hare Intl
43h 40m
1 stop
SYD9:00 amSydney Kingsford Smith
Feb 28
SYD7:05 amSydney Kingsford Smith
24h 40m
2 stops
ORD2:45 pmChicago O'Hare Intl
$988
Find similar
Qantas Airways
Jan 23
ORD2:15 pmChicago O'Hare Intl
25h 45m
1 stop
SYD9:00 amSydney Kingsford Smith
Jan 28
SYD7:05 amSydney Kingsford Smith
24h 52m
2 stops
ORD2:57 pmChicago O'Hare Intl
$990
Find similar
Qantas Airways
Feb 11
ORD6:40 pmChicago O'Hare Intl
21h 20m
1 stop
SYD9:00 amSydney Kingsford Smith
Feb 26
SYD7:05 amSydney Kingsford Smith
27h 36m
2 stops
ORD5:41 pmChicago O'Hare Intl
$1,050
Find similar

Fiji Airways flights from Illinois to Sydney

Our best Fiji Airways deals on Illinois to Sydney flight tickets
Fiji Airways
Feb 14
ORD5:11 pmChicago O'Hare Intl
26h 24m
2 stops
SYD12:35 pmSydney Kingsford Smith
Feb 21
SYD2:00 pmSydney Kingsford Smith
24h 35m
2 stops
ORD9:35 pmChicago O'Hare Intl
$1,109
Find similar
Fiji Airways
Jan 29
STL5:04 pmLambert-St Louis
26h 31m
2 stops
SYD12:35 pmSydney Kingsford Smith
Feb 10
SYD2:00 pmSydney Kingsford Smith
22h 29m
2 stops
STL7:29 pmLambert-St Louis
$1,206
Find similar
Fiji Airways
Jan 31
ORD5:37 pmChicago O'Hare Intl
35h 28m
2 stops
SYD10:05 pmSydney Kingsford Smith
Feb 14
SYD2:00 pmSydney Kingsford Smith
24h 35m
2 stops
ORD9:35 pmChicago O'Hare Intl
$1,207
Find similar

momondo Fare Finder

 
Customize 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, momondo users made 832,500 searches. Data last updated November 10, 2025.
Use the filters below to find and compare flights from Illinois to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 11/25

8:20 pm-9:00 am

1 stop43h 40m

Sydney Kingsford Smith

Sat 2/28

7:05 am-2:45 pm

2 stops24h 40m

$988

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Fri 1/23

2:15 pm-9:00 am

1 stop25h 45m

Sydney Kingsford Smith

Wed 1/28

7:05 am-2:57 pm

2 stops24h 52m

$990

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 12/8

12:59 pm-9:00 am

2 stops27h 01m

Sydney Kingsford Smith

Mon 12/15

5:45 pm-12:13 am

1 stop23h 28m

$1,037

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 12/8

6:11 am-9:00 am

2 stops33h 49m

Sydney Kingsford Smith

Mon 12/15

5:45 pm-3:12 pm

2 stops38h 27m

$1,062

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 2/14

5:11 pm-12:35 pm

2 stops26h 24m

Sydney Kingsford Smith

Sat 2/21

2:00 pm-9:35 pm

2 stops24h 35m

$1,109

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 3/9

5:25 pm-10:30 am

1 stop25h 05m

Sydney Kingsford Smith

Fri 5/8

11:50 am-5:05 am

2 stops32h 15m

$1,144

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 3/9

7:35 pm-8:15 pm

2 stops32h 40m

Sydney Kingsford Smith

Fri 5/8

11:50 am-5:05 am

2 stops32h 15m

$1,148

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 1/29

5:04 pm-12:35 pm

2 stops26h 31m

Sydney Kingsford Smith

Tue 2/10

2:00 pm-7:29 pm

2 stops22h 29m

$1,206

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 3/25

10:35 am-8:35 am

2 stops30h 00m

Sydney Kingsford Smith

Mon 4/6

9:20 am-2:43 pm

1 stop20h 23m

$1,283

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 3/1

12:50 pm-9:35 am

2 stops27h 45m

Sydney Kingsford Smith

Tue 3/10

10:20 am-8:00 am

3 stops37h 40m

$1,290

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Sydney from

How to get the cheapest flight ticket from Illinois to Sydney

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Sydney?

In general, August is the cheapest month to fly from Illinois to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $851. If you are unable to visit Sydney during the month of August, then departing from Illinois during the month May is also very affordable. Most momondo users find prices during this month for around $864.

What is the cheapest day to depart on your flight to Sydney?

The cheapest day to depart from Illinois to Sydney is on a Saturday when prices can be found for as low as $1,166. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $1,391.

What is the cheapest time of day to depart on your flight to Sydney?

According to our data, the cheapest time of day to fly to Sydney is in the morning. momondo users have found flights departing from Illinois to Sydney in the morning for as low as $1,224. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Sydney are more costly in the evening, with an average ticket price of $1,412. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight to Sydney?

You are more likely to see cheaper flights to Sydney from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,051 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Illinois for as low as $848 on momondo.

Can stopping save me money on Illinois to Sydney flights?

You could potentially save up to 30% on your flight if you consider stops on a Illinois to Sydney flight.

Cheap Illinois to Sydney flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Sydney

Direct flights

None
There are no direct flights from Illinois to Sydney. There are no popular flight routes from Illinois to Sydney.
Search flight deals

  • When did momondo last update prices for flights from Illinois to Sydney Kingsford Smith Airport?

    Prices for flights from Illinois to Sydney Kingsford Smith Airport are updated daily.

  • How many operators does momondo search for flights from Illinois to Sydney Kingsford Smith Airport?

  • How old do you have to be to fly from Illinois to Sydney Kingsford Smith Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Sydney Kingsford Smith Airport.

  • What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

    The required travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Sydney Kingsford Smith Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Illinois to Sydney

Compare and see reviews for airlines that fly from Illinois to Sydney with momondo
Airline
Rating
Free Cancellation
Price
ANAPriceFrom $679Free CancellationRating
8.4
1,003 reviews
Search ANA flights
Qantas AirwaysPriceFrom $812Free CancellationRating
7.5
930 reviews
Search Qantas Airways flights
American AirlinesPriceFrom $822Free CancellationRating
7.2
11,047 reviews
Search American Airlines flights
DeltaPriceFrom $846Free CancellationRating
7.9
8,004 reviews
Search Delta flights
Fiji AirwaysPriceFrom $849Free CancellationRating
8.1
209 reviews
Search Fiji Airways flights
United AirlinesPriceFrom $870Free CancellationRating
7.4
9,012 reviews
Search United Airlines flights
Air CanadaPriceFrom $936Free CancellationRating
7.1
10,429 reviews
Search Air Canada flights
Air New ZealandPriceFrom $1,282Free CancellationRating
8.0
525 reviews
Search Air New Zealand flights

Traveling to a place near Sydney?

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

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Sydney?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to Sydney for you.

Can I find flights from Illinois to Sydney with flexible booking policies on momondo?

All flight searches from Illinois to Sydney on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Illinois to Sydney?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Illinois to Sydney.

I’m not ready to book a flight from Illinois to Sydney right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Sydney, momondo offers a useful price alert feature which will track prices for flights to Sydney from Illinois and alert you when they change.

An easier way to manage your Sydney trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 12/10
Wed 12/17
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Australia