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Cheap flights from Illinois to Sydney from $821

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 8/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap return flights

Enter your travel dates to find the best prices.
Qantas Airways Logo
20:20 - 09:00ORD-SYD
43h 40m1 stop
Qantas Airways Logo
07:05 - 14:45SYD-ORD
24h 40m2 stops
$1,513Qantas Airways
Find Deal
Tue, 25 Nov - Sat, 28 Feb
Qantas Airways Logo
11:16 - 09:00ORD-SYD
28h 44m1 stop
Qantas Airways Logo
07:05 - 14:57SYD-ORD
24h 52m2 stops
$1,516Qantas Airways
Find Deal
Mon, 22 Dec - Thu, 29 Jan
Multiple Airlines Logo
06:15 - 07:25MDW-SYD
32h 10m2 stops
Multiple Airlines Logo
11:20 - 20:45SYD-MDW
50h 25m2 stops
$1,633Multiple Airlines
Find Deal
Fri, 5 Dec - Sat, 13 Dec
Multiple Airlines Logo
06:50 - 09:00ORD-SYD
33h 10m1 stop
Multiple Airlines Logo
11:20 - 00:13SYD-ORD
29h 53m1 stop
$1,694Multiple Airlines
Find Deal
Fri, 5 Dec - Sat, 13 Dec
Fiji Airways Logo
17:11 - 12:35ORD-SYD
26h 24m2 stops
Fiji Airways Logo
14:00 - 21:35SYD-ORD
24h 35m2 stops
$1,699Fiji Airways
Find Deal
Sat, 14 Feb - Sat, 21 Feb
ANA Logo
17:25 - 10:30ORD-SYD
25h 05m1 stop
ANA Logo
11:50 - 05:05SYD-ORD
32h 15m2 stops
$1,752ANA
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Mon, 9 Mar - Fri, 8 May
ANA Logo
17:45 - 19:15ORD-SYD
34h 30m1 stop
ANA Logo
20:55 - 14:55SYD-ORD
33h 00m1 stop
$1,754ANA
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Thu, 23 Apr - Sat, 2 May
Fiji Airways Logo
18:45 - 11:45ORD-SYD
26h 00m2 stops
Fiji Airways Logo
06:00 - 21:16SYD-ORD
30h 16m2 stops
$1,861Fiji Airways
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Sat, 4 Apr - Sat, 25 Apr
Air Canada Logo
15:40 - 09:35ORD-SYD
24h 55m1 stop
Air Canada Logo
10:20 - 19:53SYD-ORD
25h 33m1 stop
$1,965Air Canada
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Sun, 1 Mar - Tue, 10 Mar
Air Canada Logo
08:45 - 09:35ORD-SYD
31h 50m2 stops
Air Canada Logo
10:20 - 08:00SYD-ORD
37h 40m3 stops
$1,976Air Canada
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Sun, 1 Mar - Wed, 18 Mar

Qantas Airways flights from Illinois to Sydney

Our best Qantas Airways deals on Illinois to Sydney flight tickets
Qantas Airways
25 Nov
ORD20:20Chicago O'Hare Intl
43h 40m
1 stop
SYD09:00Sydney Kingsford Smith
28 Feb
SYD07:05Sydney Kingsford Smith
24h 40m
2 stops
ORD14:45Chicago O'Hare Intl
$1,513
Find similar
Qantas Airways
22 Dec
ORD11:16Chicago O'Hare Intl
28h 44m
1 stop
SYD09:00Sydney Kingsford Smith
29 Jan
SYD07:05Sydney Kingsford Smith
24h 52m
2 stops
ORD14:57Chicago O'Hare Intl
$1,516
Find similar
Qantas Airways
11 Feb
ORD18:40Chicago O'Hare Intl
21h 20m
1 stop
SYD09:00Sydney Kingsford Smith
26 Feb
SYD07:05Sydney Kingsford Smith
27h 36m
2 stops
ORD17:41Chicago O'Hare Intl
$1,608
Find similar

Fiji Airways flights from Illinois to Sydney

Our best Fiji Airways deals on Illinois to Sydney flight tickets
Fiji Airways
14 Feb
ORD17:11Chicago O'Hare Intl
26h 24m
2 stops
SYD12:35Sydney Kingsford Smith
21 Feb
SYD14:00Sydney Kingsford Smith
24h 35m
2 stops
ORD21:35Chicago O'Hare Intl
$1,699
Find similar
Fiji Airways
4 Apr
ORD18:45Chicago O'Hare Intl
26h 00m
2 stops
SYD11:45Sydney Kingsford Smith
25 Apr
SYD06:00Sydney Kingsford Smith
30h 16m
2 stops
ORD21:16Chicago O'Hare Intl
$1,861
Find similar
Fiji Airways
28 Feb
ORD17:11Chicago O'Hare Intl
26h 24m
2 stops
SYD12:35Sydney Kingsford Smith
10 Mar
SYD14:00Sydney Kingsford Smith
23h 07m
2 stops
ORD21:07Chicago O'Hare Intl
$1,890
Find similar

momondo Fare Finder

 
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, momondo users made 78,305 searches. Data last updated 11 November 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 25/11

20:20-09:00

1 stop43h 40m

Sydney Kingsford Smith

Sat 28/2

07:05-14:45

2 stops24h 40m

$1,513

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 22/12

11:16-09:00

1 stop28h 44m

Sydney Kingsford Smith

Thu 29/1

07:05-14:57

2 stops24h 52m

$1,516

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Fri 5/12

06:15-07:25

2 stops32h 10m

Sydney Kingsford Smith

Sat 13/12

11:20-20:45

2 stops50h 25m

$1,633

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Fri 5/12

06:50-09:00

1 stop33h 10m

Sydney Kingsford Smith

Sat 13/12

11:20-00:13

1 stop29h 53m

$1,694

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 14/2

17:11-12:35

2 stops26h 24m

Sydney Kingsford Smith

Sat 21/2

14:00-21:35

2 stops24h 35m

$1,699

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 9/3

17:25-10:30

1 stop25h 05m

Sydney Kingsford Smith

Fri 8/5

11:50-05:05

2 stops32h 15m

$1,752

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 23/4

17:45-19:15

1 stop34h 30m

Sydney Kingsford Smith

Sat 2/5

20:55-14:55

1 stop33h 00m

$1,754

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 4/4

18:45-11:45

2 stops26h 00m

Sydney Kingsford Smith

Sat 25/4

06:00-21:16

2 stops30h 16m

$1,861

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 1/3

15:40-09:35

1 stop24h 55m

Sydney Kingsford Smith

Tue 10/3

10:20-19:53

1 stop25h 33m

$1,965

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 1/3

08:45-09:35

2 stops31h 50m

Sydney Kingsford Smith

Wed 18/3

10:20-08:00

3 stops37h 40m

$1,976

Flights are sorted by cheapest return 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?

The month of August is, on average, the cheapest month to fly to Sydney from Illinois, with most prices found around $1,303. If you aren’t able to travel to Sydney during the month of August, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $1,323.

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

Our data shows that Sunday is the least expensive day to fly to Sydney. Tickets to fly out on this day can be as low as $1,808. The most expensive day to fly to Sydney is Tuesday, with ticket prices averaging around $2,483.

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 afternoon. momondo users have found flights departing from Illinois to Sydney in the afternoon for as low as $2,115. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying at midday when prices are $3,233 on average. Flights to Sydney from Illinois at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

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 $1,609 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Illinois for as low as $1,299 on momondo.

Can stopping save me money on Illinois to Sydney flights?

You could potentially save up to 38% 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 refresh 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?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. 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 licence 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
American AirlinesPriceFrom $1,312Free cancellationRating
7.2
11,045 reviews
Search American Airlines flights
Qantas AirwaysPriceFrom $1,339Free cancellationRating
7.5
933 reviews
Search Qantas Airways flights

Travelling to a place near Sydney?

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

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Illinois to Sydney. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Illinois to Sydney flights to just show those with flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to Sydney from Illinois. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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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