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Cheap flights from Chicago to Sydney from $432

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 9/16. 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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Cheap round-trip flights

 Logo
6:40 am - 10:10 pmORD-SYD
48h 30m2 stops
 Logo
1:15 pm - 6:00 amSYD-ORD
31h 45m2 stops
Wed, Aug 6 - Wed, Aug 13
 Logo
6:40 am - 10:10 pmORD-SYD
48h 30m2 stops
 Logo
1:15 pm - 5:40 amSYD-ORD
31h 25m2 stops
Wed, Aug 6 - Fri, Aug 22
 Logo
6:40 am - 10:10 pmORD-SYD
48h 30m2 stops
 Logo
1:15 pm - 5:40 amSYD-ORD
31h 25m2 stops
Wed, Aug 6 - Fri, Aug 22
 Logo
6:40 am - 11:45 amORD-SYD
38h 05m2 stops
 Logo
1:15 pm - 5:40 amSYD-ORD
31h 25m2 stops
Tue, Aug 12 - Tue, Aug 26
 Logo
6:40 am - 7:05 amORD-SYD
33h 25m1 stop
 Logo
9:10 am - 11:43 amSYD-ORD
41h 33m2 stops
Sun, Aug 10 - Sun, Aug 17
Alaska Airlines Logo
7:00 am - 7:05 amORD-SYD
33h 05m2 stops
Alaska Airlines Logo
9:10 am - 12:04 amSYD-ORD
29h 54m2 stops
$1,001Alaska Airlines
Find Deal
Sun, Aug 24 - Sat, Sep 6
Delta Logo
1:43 pm - 6:35 amMDW-SYD
25h 52m2 stops
Delta Logo
9:25 am - 5:35 pmSYD-MDW
23h 10m2 stops
$1,466Delta
Find Deal
Wed, Sep 10 - Tue, Sep 23
Delta Logo
10:31 am - 6:35 amMDW-SYD
29h 04m2 stops
Delta Logo
9:25 am - 5:35 pmSYD-MDW
23h 10m2 stops
$1,516Delta
Find Deal
Tue, Sep 2 - Thu, Sep 25
Korean Air Logo
3:30 pm - 6:55 amMDW-SYD
46h 25m2 stops
Korean Air Logo
9:10 am - 12:35 pmSYD-MDW
44h 25m2 stops
$3,042Korean Air
Find Deal
Thu, Dec 25 - Thu, Jan 8
Korean Air Logo
9:25 am - 6:20 amMDW-SYD
29h 55m2 stops
Korean Air Logo
7:55 am - 12:29 pmSYD-MDW
43h 34m2 stops
$3,083Korean Air
Find Deal
Tue, Jul 15 - Tue, Jul 29

Qantas Airways flights from Chicago to Sydney

Our best Qantas Airways deals on Chicago to Sydney flight tickets
Qantas Airways
Jul 7
ORD3:21 pmChicago O'Hare Intl
24h 44m
1 stop
SYD7:05 amSydney Kingsford Smith
Jul 23
SYD9:10 amSydney Kingsford Smith
22h 52m
1 stop
ORD5:02 pmChicago O'Hare Intl
Qantas Airways
Jul 7
ORD6:45 pmChicago O'Hare Intl
21h 20m
1 stop
SYD7:05 amSydney Kingsford Smith
Jul 23
SYD10:25 amSydney Kingsford Smith
25h 35m
1 stop
ORD9:00 pmChicago O'Hare Intl
Qantas Airways
Jul 5
ORD8:55 pmChicago O'Hare Intl
43h 10m
1 stop
SYD7:05 amSydney Kingsford Smith
Jul 26
SYD9:10 amSydney Kingsford Smith
20h 07m
1 stop
ORD2:17 pmChicago O'Hare Intl

Delta flights from Chicago to Sydney

Our best Delta deals on Chicago to Sydney flight tickets
Delta
Sep 10
MDW1:43 pmChicago Midway
25h 52m
2 stops
SYD6:35 amSydney Kingsford Smith
Sep 23
SYD9:25 amSydney Kingsford Smith
23h 10m
2 stops
MDW5:35 pmChicago Midway
Delta
Sep 2
MDW10:31 amChicago Midway
29h 04m
2 stops
SYD6:35 amSydney Kingsford Smith
Sep 25
SYD9:25 amSydney Kingsford Smith
23h 10m
2 stops
MDW5:35 pmChicago Midway
Delta
Nov 6
MDW1:00 pmChicago Midway
26h 30m
2 stops
SYD8:30 amSydney Kingsford Smith
Nov 22
SYD10:40 amSydney Kingsford Smith
28h 04m
2 stops
MDW9:44 pmChicago Midway

See travel insights to Sydney from

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 $863. If you are unable to visit Sydney during the month of August, then departing from Chicago during the month April is also very affordable. Most momondo users find prices during this month for around $867.

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 $1,110 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 $931 on momondo.

Can stopping save me money on Chicago to Sydney flights?

You could potentially save up to 2% 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 July 2025, prices for Chicago to Sydney flights are approximately 56% 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

Best Price Found

$432

Fastest flight time

21h 02m

Direct flights

None

Airports in Sydney

1 airport
The best one-way flight to Sydney from Chicago in the past 72 hours is $432. The best round-trip flight deal from Chicago to Sydney found on momondo in the last 72 hours is $852.
The fastest flight from Chicago to Sydney takes 21h 02m
There are no direct flights from Chicago to Sydney. Popular non-direct routes for this connection are Chicago O'Hare Intl Airport - Sydney Kingsford Smith Airport and Chicago Midway Airport - Sydney Kingsford Smith Airport.
There is 1 airport near Sydney: Sydney Kingsford Smith (SYD)

  • 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 53m.

  • 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
892 reviews
Search ANA flights
Qantas AirwaysPriceFrom $813Free CancellationRating
7.5
870 reviews
Search Qantas Airways flights
American AirlinesPriceFrom $825Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Fiji AirwaysPriceFrom $849Free CancellationRating
8.0
202 reviews
Search Fiji Airways flights
DeltaPriceFrom $852Free CancellationRating
8.0
7,983 reviews
Search Delta flights
Air CanadaPriceFrom $970Free CancellationRating
7.1
9,669 reviews
Search Air Canada flights
United AirlinesPriceFrom $1,203Free CancellationRating
7.4
8,861 reviews
Search United Airlines flights
Air New ZealandPriceFrom $1,330Free CancellationRating
8.0
486 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
Katoomba
Bondi Beach
Wollongong
Randwick
Cronulla
Manly
Coogee
Penrith
Charlestown
Lithgow
Swansea
Leura
Terrigal

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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