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Cheap flights from Chicago to Sydney from $579

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 11/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Qantas Airways Logo
6:17 pm - 9:00 amORD-SYD
21h 43m1 stop
Qantas Airways Logo
7:05 am - 4:39 pmSYD-ORD
26h 34m2 stops
$883Qantas Airways
Find Deal
jue., dic. 4 - mié., mar. 4
Qantas Airways Logo
9:02 am - 9:00 amORD-SYD
30h 58m1 stop
Qantas Airways Logo
7:05 am - 5:41 pmSYD-ORD
27h 36m2 stops
$950Qantas Airways
Find Deal
mié., feb. 11 - jue., feb. 26
Qantas Airways Logo
3:11 pm - 8:50 pmORD-SYD
36h 39m2 stops
Qantas Airways Logo
11:20 am - 3:33 pmSYD-ORD
21h 13m1 stop
$972Qantas Airways
Find Deal
jue., dic. 11 - jue., dic. 18
Qantas Airways Logo
6:23 pm - 9:00 amORD-SYD
21h 37m1 stop
Qantas Airways Logo
7:05 am - 4:02 pmSYD-ORD
25h 57m2 stops
$980Qantas Airways
Find Deal
dom., nov. 30 - mié., dic. 10
Qantas Airways Logo
7:47 pm - 7:35 amORD-SYD
42h 48m2 stops
Qantas Airways Logo
11:20 am - 2:05 pmSYD-ORD
19h 45m1 stop
$981Qantas Airways
Find Deal
vie., feb. 13 - vie., feb. 27
Qantas Airways Logo
2:00 pm - 8:50 pmORD-SYD
37h 50m2 stops
Qantas Airways Logo
9:25 pm - 11:05 amSYD-ORD
29h 40m1 stop
$989Qantas Airways
Find Deal
lun., mar. 2 - dom., mar. 8
Multiple Airlines Logo
6:50 am - 9:00 amORD-SYD
33h 10m1 stop
Multiple Airlines Logo
5:45 pm - 12:13 amSYD-ORD
23h 28m1 stop
$1,001Multiple Airlines
Find Deal
dom., dic. 7 - vie., dic. 12
Delta Logo
12:48 pm - 6:50 amMDW-SYD
25h 02m2 stops
Delta Logo
2:15 pm - 10:44 pmSYD-MDW
25h 29m2 stops
$1,465Delta
Find Deal
dom., feb. 1 - lun., feb. 23
Delta Logo
1:28 pm - 6:50 amMDW-SYD
24h 22m2 stops
Delta Logo
10:40 am - 4:16 pmSYD-MDW
22h 36m2 stops
$1,466Delta
Find Deal
dom., feb. 1 - dom., feb. 15
Delta Logo
10:53 am - 8:30 amMDW-SYD
28h 37m2 stops
Delta Logo
10:40 am - 5:45 pmSYD-MDW
24h 05m2 stops
$1,515Delta
Find Deal
vie., ene. 30 - lun., feb. 23

Air Canada flights from Chicago to Sydney

Our best Air Canada deals on Chicago to Sydney flight tickets
Air Canada
May 5
ORD9:00 amChicago O'Hare Intl
31h 20m
2 stops
SYD7:20 amSydney Kingsford Smith
May 26
SYD9:20 amSydney Kingsford Smith
24h 59m
2 stops
ORD7:19 pmChicago O'Hare Intl
$1,239
Find similar
Air Canada
May 5
ORD8:40 amChicago O'Hare Intl
31h 40m
3 stops
SYD7:20 amSydney Kingsford Smith
May 26
SYD9:20 amSydney Kingsford Smith
24h 59m
2 stops
ORD7:19 pmChicago O'Hare Intl
$1,245
Find similar
Air Canada
Feb 11
ORD3:40 pmChicago O'Hare Intl
24h 55m
1 stop
SYD9:35 amSydney Kingsford Smith
Feb 28
SYD11:20 amSydney Kingsford Smith
20h 21m
1 stop
ORD2:41 pmChicago O'Hare Intl
$1,279
Find similar

Qantas Airways flights from Chicago to Sydney

Our best Qantas Airways deals on Chicago to Sydney flight tickets
Qantas Airways
Dec 4
ORD6:17 pmChicago O'Hare Intl
21h 43m
1 stop
SYD9:00 amSydney Kingsford Smith
Mar 4
SYD7:05 amSydney Kingsford Smith
26h 34m
2 stops
ORD4:39 pmChicago O'Hare Intl
$883
Find similar
Qantas Airways
Feb 11
ORD9:02 amChicago O'Hare Intl
30h 58m
1 stop
SYD9:00 amSydney Kingsford Smith
Feb 26
SYD7:05 amSydney Kingsford Smith
27h 36m
2 stops
ORD5:41 pmChicago O'Hare Intl
$950
Find similar
Qantas Airways
Dec 11
ORD3:11 pmChicago O'Hare Intl
36h 39m
2 stops
SYD8:50 pmSydney Kingsford Smith
Dec 18
SYD11:20 amSydney Kingsford Smith
21h 13m
1 stop
ORD3:33 pmChicago O'Hare Intl
$972
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated noviembre 13, 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

jue. 12/4

6:17 pm-9:00 am

1 stop21h 43m

Sydney Kingsford Smith

mié. 3/4

7:05 am-4:39 pm

2 stops26h 34m

$883

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

mié. 2/11

9:02 am-9:00 am

1 stop30h 58m

Sydney Kingsford Smith

jue. 2/26

7:05 am-5:41 pm

2 stops27h 36m

$950

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

jue. 12/11

3:11 pm-8:50 pm

2 stops36h 39m

Sydney Kingsford Smith

jue. 12/18

11:20 am-3:33 pm

1 stop21h 13m

$972

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

dom. 11/30

6:23 pm-9:00 am

1 stop21h 37m

Sydney Kingsford Smith

mié. 12/10

7:05 am-4:02 pm

2 stops25h 57m

$980

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

vie. 2/13

7:47 pm-7:35 am

2 stops42h 48m

Sydney Kingsford Smith

vie. 2/27

11:20 am-2:05 pm

1 stop19h 45m

$981

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

lun. 3/2

2:00 pm-8:50 pm

2 stops37h 50m

Sydney Kingsford Smith

dom. 3/8

9:25 pm-11:05 am

1 stop29h 40m

$989

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

dom. 12/7

6:50 am-9:00 am

1 stop33h 10m

Sydney Kingsford Smith

vie. 12/12

5:45 pm-12:13 am

1 stop23h 28m

$1,001

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

dom. 2/1

12:48 pm-6:50 am

2 stops25h 02m

Sydney Kingsford Smith

lun. 2/23

2:15 pm-10:44 pm

2 stops25h 29m

$1,465

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

dom. 2/1

1:28 pm-6:50 am

2 stops24h 22m

Sydney Kingsford Smith

dom. 2/15

10:40 am-4:16 pm

2 stops22h 36m

$1,466

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

vie. 1/30

10:53 am-8:30 am

2 stops28h 37m

Sydney Kingsford Smith

lun. 2/23

10:40 am-5:45 pm

2 stops24h 05m

$1,515

Flights are sorted by cheapest round-trip 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 typical price of a round-trip flight between Chicago and Sydney?

What is the cheapest month to fly to Sydney?

In general, August is the cheapest month to fly from Chicago 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 Chicago 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 Chicago 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 Chicago 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 Chicago 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 Chicago for as low as $848 on momondo.

Can stopping save me money on Chicago to Sydney flights?

You could potentially save up to 30% 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 round-trip 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.
Search flight deals

  • How far is Chicago to Sydney Kingsford Smith by plane?

    There are 9237.5 mi between Chicago and Sydney Kingsford Smith. By plane, this route typically takes 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 a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Chicago 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.

  • 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
ANAPriceFrom $679Free CancellationRating
8.4
1,004 reviews
Search ANA flights
Qantas AirwaysPriceFrom $812Free CancellationRating
7.5
934 reviews
Search Qantas Airways flights
American AirlinesPriceFrom $822Free CancellationRating
7.2
11,051 reviews
Search American Airlines flights
DeltaPriceFrom $846Free CancellationRating
7.9
8,007 reviews
Search Delta flights
Fiji AirwaysPriceFrom $849Free CancellationRating
8.1
209 reviews
Search Fiji Airways flights
United AirlinesPriceFrom $870Free CancellationRating
7.4
9,017 reviews
Search United Airlines flights
Air CanadaPriceFrom $936Free CancellationRating
7.1
10,448 reviews
Search Air Canada flights
Air New ZealandPriceFrom $1,282Free CancellationRating
8.0
526 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 Chicago 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 Chicago to Sydney for 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 for Chicago to Sydney flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes. momondo can track prices for Chicago to Sydney flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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