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Cheap flights from Illinois to Sydney from $483

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 2/24. 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

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Find the cheapest flights from Illinois to Sydney

Cheap round-trip flights

Enter your travel dates to find the best prices.
Qantas Airways Logo
6:40 pm - 8:50 pm
ORD
-
SYD
33h 10m2 stops
Qantas Airways Logo
11:20 am - 4:38 pm
SYD
-
ORD
22h 18m1 stop
$881Qantas Airways
Mon, Feb 9 - Mon, Mar 2
Qantas Airways Logo
3:10 pm - 8:50 pm
ORD
-
SYD
36h 40m2 stops
Qantas Airways Logo
11:20 am - 2:04 pm
SYD
-
ORD
19h 44m1 stop
$882Qantas Airways
Mon, Feb 9 - Mon, Mar 2
Qantas Airways Logo
2:15 pm - 9:00 am
ORD
-
SYD
25h 45m1 stop
Qantas Airways Logo
7:15 pm - 4:38 pm
SYD
-
ORD
38h 23m2 stops
$884Qantas Airways
Mon, Feb 9 - Mon, Mar 2
Delta Logo
1:10 pm - 6:05 am
MDW
-
SYD
24h 55m2 stops
Delta Logo
10:15 am - 6:40 pm
SYD
-
MDW
24h 25m2 stops
$1,468Delta
Sun, Mar 15 - Sun, Mar 29
Delta Logo
1:10 pm - 7:25 am
MDW
-
SYD
26h 15m2 stops
Delta Logo
10:15 am - 10:31 pm
SYD
-
MDW
28h 16m2 stops
$1,469Delta
Wed, Mar 25 - Wed, Apr 1
United Airlines Logo
8:50 am - 7:55 am
PIA
-
SYD
31h 05m2 stops
United Airlines Logo
10:20 am - 4:44 pm
SYD
-
PIA
21h 24m2 stops
$1,470United Airlines
Fri, Apr 3 - Tue, Apr 7
United Airlines Logo
1:24 pm - 9:05 am
PIA
-
SYD
26h 41m2 stops
United Airlines Logo
11:50 am - 4:50 pm
SYD
-
PIA
22h 00m2 stops
$1,471United Airlines
Mon, Feb 9 - Mon, Feb 16
American Airlines Logo
7:00 am - 6:55 am
PIA
-
SYD
30h 55m1 stop
American Airlines Logo
2:05 pm - 10:50 pm
SYD
-
PIA
25h 45m1 stop
$1,599American Airlines
Mon, Feb 9 - Mon, Feb 16
American Airlines Logo
11:10 am - 9:00 am
PIA
-
SYD
28h 50m2 stops
American Airlines Logo
2:05 pm - 4:36 pm
SYD
-
PIA
19h 31m1 stop
$1,602American Airlines
Mon, Feb 9 - Mon, Feb 16
Multiple Airlines Logo
7:39 am - 5:30 pm
PIA
-
SYD
40h 51m3 stops
Multiple Airlines Logo
3:15 pm - 6:22 pm
SYD
-
PIA
44h 07m2 stops
$1,981Multiple Airlines
Mon, Feb 9 - Mon, Feb 16

ANA flights from Illinois to Sydney

Our best ANA deals on Illinois to Sydney flight tickets
ANA
Mar 4
ORD6:20 pmChicago O'Hare Intl
32h 55m
2 stops
SYD8:15 pmSydney Kingsford Smith
Mar 11
SYD12:25 pmSydney Kingsford Smith
32h 53m
2 stops
ORD5:18 amChicago O'Hare Intl
$1,217
Find similar
ANA
Dec 30
ORD4:25 pmChicago O'Hare Intl
34h 50m
1 stop
SYD8:15 pmSydney Kingsford Smith
Jan 24
SYD12:25 pmSydney Kingsford Smith
33h 50m
2 stops
ORD5:15 amChicago O'Hare Intl
$1,615
Find similar

Delta flights from Illinois to Sydney

Our best Delta deals on Illinois to Sydney flight tickets
Delta
Mar 15
MDW1:10 pmChicago Midway
24h 55m
2 stops
SYD6:05 amSydney Kingsford Smith
Mar 29
SYD10:15 amSydney Kingsford Smith
24h 25m
2 stops
MDW6:40 pmChicago Midway
$1,468
Find similar
Delta
Mar 25
MDW1:10 pmChicago Midway
26h 15m
2 stops
SYD7:25 amSydney Kingsford Smith
Apr 1
SYD10:15 amSydney Kingsford Smith
28h 16m
2 stops
MDW10:31 pmChicago Midway
$1,469
Find similar
Delta
Mar 1
MDW1:28 pmChicago Midway
24h 22m
2 stops
SYD6:50 amSydney Kingsford Smith
Mar 14
SYD1:15 pmSydney Kingsford Smith
25h 16m
2 stops
MDW10:31 pmChicago Midway
$1,518
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 December 27, 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

Mon 2/9

6:40 pm-8:50 pm

2 stops33h 10m

Sydney Kingsford Smith

Mon 3/2

11:20 am-4:38 pm

1 stop22h 18m

$881

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 2/9

3:10 pm-8:50 pm

2 stops36h 40m

Sydney Kingsford Smith

Mon 3/2

11:20 am-2:04 pm

1 stop19h 44m

$882

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 2/9

2:15 pm-9:00 am

1 stop25h 45m

Sydney Kingsford Smith

Mon 3/2

7:15 pm-4:38 pm

2 stops38h 23m

$884

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Sun 3/15

1:10 pm-6:05 am

2 stops24h 55m

Sydney Kingsford Smith

Sun 3/29

10:15 am-6:40 pm

2 stops24h 25m

$1,468

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Wed 3/25

1:10 pm-7:25 am

2 stops26h 15m

Sydney Kingsford Smith

Wed 4/1

10:15 am-10:31 pm

2 stops28h 16m

$1,469

PeoriaSydney

PIA - SYD

PIASYD

Greater Peoria

Fri 4/3

8:50 am-7:55 am

2 stops31h 05m

Sydney Kingsford Smith

Tue 4/7

10:20 am-4:44 pm

2 stops21h 24m

$1,470

PeoriaSydney

PIA - SYD

PIASYD

Greater Peoria

Mon 2/9

1:24 pm-9:05 am

2 stops26h 41m

Sydney Kingsford Smith

Mon 2/16

11:50 am-4:50 pm

2 stops22h 00m

$1,471

PeoriaSydney

PIA - SYD

PIASYD

Greater Peoria

Mon 2/9

7:00 am-6:55 am

1 stop30h 55m

Sydney Kingsford Smith

Mon 2/16

2:05 pm-10:50 pm

1 stop25h 45m

$1,599

PeoriaSydney

PIA - SYD

PIASYD

Greater Peoria

Mon 2/9

11:10 am-9:00 am

2 stops28h 50m

Sydney Kingsford Smith

Mon 2/16

2:05 pm-4:36 pm

1 stop19h 31m

$1,602

PeoriaSydney

PIA - SYD

PIASYD

Greater Peoria

Mon 2/9

7:39 am-5:30 pm

3 stops40h 51m

Sydney Kingsford Smith

Mon 2/16

3:15 pm-6:22 pm

2 stops44h 07m

$1,981

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 $853. If you are unable to visit Sydney during the month of August, then departing from Illinois during the month June is also very affordable. Most momondo users find prices during this month for around $863.

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.

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 $1,072 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 $851 on momondo.

Can stopping save me money on Illinois to Sydney flights?

You could potentially save up to 26% 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

Fastest flight time

20h 49m

Direct flights

None
The fastest flight from Illinois to Sydney takes 20h 49m
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
1,049 reviews
Search ANA flights
Qantas AirwaysPriceFrom $810Free CancellationRating
7.5
957 reviews
Search Qantas Airways flights
American AirlinesPriceFrom $812Free CancellationRating
7.2
11,073 reviews
Search American Airlines flights
Fiji AirwaysPriceFrom $849Free CancellationRating
8.0
212 reviews
Search Fiji Airways flights
Air CanadaPriceFrom $851Free CancellationRating
7.1
10,562 reviews
Search Air Canada flights
United AirlinesPriceFrom $870Free CancellationRating
7.4
9,116 reviews
Search United Airlines flights
DeltaPriceFrom $935Free CancellationRating
7.9
8,022 reviews
Search Delta flights
Air New ZealandPriceFrom $1,282Free CancellationRating
8.0
561 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
Manly
Penrith
Cronulla
Lithgow
Leura
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.

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