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Cheap flights from Chicago to Sydney from $877

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to Sydney departing on 7/2. 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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Find the cheapest flights from Chicago to Sydney

Cheap return flights

Enter your travel dates to find the best prices.
Qantas Airways Logo
18:17 - 09:00ORD-SYD
21h 43m1 stop
Qantas Airways Logo
07:05 - 16:39SYD-ORD
26h 34m2 stops
$1,352Qantas Airways
Find Deal
Thu, 4 Dec - Wed, 4 Mar
Qantas Airways Logo
08:50 - 09:00ORD-SYD
31h 10m1 stop
Qantas Airways Logo
07:05 - 16:39SYD-ORD
26h 34m2 stops
$1,353Qantas Airways
Find Deal
Thu, 4 Dec - Mon, 2 Mar
Qantas Airways Logo
18:40 - 09:00ORD-SYD
21h 20m1 stop
Qantas Airways Logo
07:05 - 16:39SYD-ORD
26h 34m2 stops
$1,378Qantas Airways
Find Deal
Tue, 10 Feb - Tue, 24 Feb
Qantas Airways Logo
18:40 - 09:00ORD-SYD
21h 20m1 stop
Qantas Airways Logo
07:05 - 17:41SYD-ORD
27h 36m2 stops
$1,454Qantas Airways
Find Deal
Sat, 31 Jan - Sat, 14 Feb
Qantas Airways Logo
09:02 - 09:00ORD-SYD
30h 58m1 stop
Qantas Airways Logo
07:05 - 16:39SYD-ORD
26h 34m2 stops
$1,456Qantas Airways
Find Deal
Sun, 8 Feb - Thu, 26 Feb
Qantas Airways Logo
18:40 - 17:40ORD-SYD
30h 00m2 stops
Qantas Airways Logo
11:20 - 23:49SYD-ORD
29h 29m1 stop
$1,488Qantas Airways
Find Deal
Wed, 11 Feb - Sat, 28 Feb
Multiple Airlines Logo
05:30 - 07:25MDW-SYD
32h 55m2 stops
Multiple Airlines Logo
17:45 - 09:52SYD-MDW
33h 07m2 stops
$2,060Multiple Airlines
Find Deal
Mon, 1 Dec - Sun, 14 Dec
Delta Logo
12:48 - 08:30MDW-SYD
26h 42m2 stops
Delta Logo
09:25 - 18:05SYD-MDW
23h 40m2 stops
$2,244Delta
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Sun, 1 Feb - Sun, 31 May
Delta Logo
09:50 - 08:30MDW-SYD
29h 40m2 stops
Delta Logo
10:40 - 17:45SYD-MDW
24h 05m2 stops
$2,320Delta
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Wed, 11 Feb - Fri, 27 Feb
Delta Logo
13:00 - 06:35MDW-SYD
26h 35m2 stops
Delta Logo
09:25 - 18:31SYD-MDW
24h 06m2 stops
$2,397Delta
Find Deal
Sat, 4 Apr - Sat, 25 Apr

Qantas Airways flights from Chicago to Sydney

Our best Qantas Airways deals on Chicago to Sydney flight tickets
Qantas Airways
4 Dec
ORD18:17Chicago O'Hare Intl
21h 43m
1 stop
SYD09:00Sydney Kingsford Smith
4 Mar
SYD07:05Sydney Kingsford Smith
26h 34m
2 stops
ORD16:39Chicago O'Hare Intl
$1,352
Find similar
Qantas Airways
4 Dec
ORD08:50Chicago O'Hare Intl
31h 10m
1 stop
SYD09:00Sydney Kingsford Smith
2 Mar
SYD07:05Sydney Kingsford Smith
26h 34m
2 stops
ORD16:39Chicago O'Hare Intl
$1,353
Find similar
Qantas Airways
10 Feb
ORD18:40Chicago O'Hare Intl
21h 20m
1 stop
SYD09:00Sydney Kingsford Smith
24 Feb
SYD07:05Sydney Kingsford Smith
26h 34m
2 stops
ORD16:39Chicago O'Hare Intl
$1,378
Find similar

ANA flights from Chicago to Sydney

Our best ANA deals on Chicago to Sydney flight tickets
ANA
4 May
ORD17:45Chicago O'Hare Intl
34h 30m
1 stop
SYD19:15Sydney Kingsford Smith
11 May
SYD11:50Sydney Kingsford Smith
32h 15m
2 stops
ORD05:05Chicago O'Hare Intl
$1,777
Find similar
ANA
4 Apr
ORD20:04Chicago O'Hare Intl
32h 11m
2 stops
SYD19:15Sydney Kingsford Smith
25 Apr
SYD11:50Sydney Kingsford Smith
32h 11m
2 stops
ORD05:01Chicago O'Hare Intl
$1,864
Find similar
ANA
4 May
ORD07:40Chicago O'Hare Intl
44h 35m
2 stops
SYD19:15Sydney Kingsford Smith
11 May
SYD20:55Sydney Kingsford Smith
34h 39m
2 stops
ORD16:34Chicago O'Hare Intl
$1,880
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Chicago 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 15 November 2025.
Use the filters below to find and compare flights from Chicago to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 4/12

18:17-09:00

1 stop21h 43m

Sydney Kingsford Smith

Wed 4/3

07:05-16:39

2 stops26h 34m

$1,352

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 4/12

08:50-09:00

1 stop31h 10m

Sydney Kingsford Smith

Mon 2/3

07:05-16:39

2 stops26h 34m

$1,353

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 10/2

18:40-09:00

1 stop21h 20m

Sydney Kingsford Smith

Tue 24/2

07:05-16:39

2 stops26h 34m

$1,378

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 31/1

18:40-09:00

1 stop21h 20m

Sydney Kingsford Smith

Sat 14/2

07:05-17:41

2 stops27h 36m

$1,454

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 8/2

09:02-09:00

1 stop30h 58m

Sydney Kingsford Smith

Thu 26/2

07:05-16:39

2 stops26h 34m

$1,456

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 11/2

18:40-17:40

2 stops30h 00m

Sydney Kingsford Smith

Sat 28/2

11:20-23:49

1 stop29h 29m

$1,488

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Mon 1/12

05:30-07:25

2 stops32h 55m

Sydney Kingsford Smith

Sun 14/12

17:45-09:52

2 stops33h 07m

$2,060

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Sun 1/2

12:48-08:30

2 stops26h 42m

Sydney Kingsford Smith

Sun 31/5

09:25-18:05

2 stops23h 40m

$2,244

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Wed 11/2

09:50-08:30

2 stops29h 40m

Sydney Kingsford Smith

Fri 27/2

10:40-17:45

2 stops24h 05m

$2,320

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Sat 4/4

13:00-06:35

2 stops26h 35m

Sydney Kingsford Smith

Sat 25/4

09:25-18:31

2 stops24h 06m

$2,397

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Chicago 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 Chicago, 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 $1,322.

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 $1,807. The most expensive day to fly to Sydney is Tuesday, with ticket prices averaging around $2,481.

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 Chicago to Sydney in the afternoon for as low as $2,114. 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 $3,231 on average. Flights to Sydney from Chicago 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 Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,608 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 Chicago for as low as $1,298 on momondo.

Can stopping save me money on Chicago to Sydney flights?

You could potentially save up to 38% on your flight if you consider stops on a Chicago to Sydney flight.

How have Chicago to Sydney flight prices changed over time?

As of November 2025, prices for Chicago to Sydney flights are approximately 52% cheaper when compared to flights at the same time last year.

When to book flights from Chicago to Sydney

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago to Sydney according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Chicago to Sydney (CHI to SYD) flight deals and tips

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

Direct flights

None
There are no direct flights from Chicago to Sydney. There are no popular flight routes from Chicago to Sydney.
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  • How far is Chicago to Sydney Kingsford Smith by plane?

    Chicago and Sydney Kingsford Smith are 14866.2 km apart from one another. A reasonable flight in good conditions will take 21h 20m.

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

    Prices for flights from Chicago to Sydney Kingsford Smith Airport were last updated today.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Chicago to Sydney Kingsford Smith Airport.

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

    The necessary travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Chicago to Sydney?

Best airlines flying from Chicago to Sydney

Compare and see reviews for airlines that fly from Chicago to Sydney with momondo
Airline
Rating
Free cancellation
Price
American AirlinesPriceFrom $1,311Free cancellationRating
7.2
11,050 reviews
Search American Airlines flights
Qantas AirwaysPriceFrom $1,338Free cancellationRating
7.5
934 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 Chicago to Sydney?

It is quick and easy to find Chicago to Sydney flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Sydney that suits you.

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

Yes. momondo enables you to select and highlight flights to Sydney from Chicago with this policy.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Sydney from Chicago.

I’m not ready to book a flight from Chicago 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 Chicago and alert you when they change.

An easier way to manage your Sydney trip

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