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Cheap flights from Chicago O'Hare Intl Airport 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 Chicago O'Hare Intl Airport 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
15:11 - 20:50ORD-SYD
36h 39m2 stops
Qantas Airways Logo
11:20 - 17:36SYD-ORD
23h 16m1 stop
$1,489Qantas Airways
Find Deal
Thu, 11 Dec - Thu, 18 Dec
Qantas Airways Logo
20:20 - 09:00ORD-SYD
43h 40m1 stop
Qantas Airways Logo
07:05 - 14:45SYD-ORD
24h 40m2 stops
$1,514Qantas Airways
Find Deal
Tue, 25 Nov - Sat, 28 Feb
Multiple Airlines Logo
06:50 - 09:00ORD-SYD
33h 10m1 stop
Multiple Airlines Logo
17:45 - 00:13SYD-ORD
23h 28m1 stop
$1,533Multiple Airlines
Find Deal
Sun, 7 Dec - Fri, 12 Dec
Multiple Airlines Logo
06:50 - 09:00ORD-SYD
33h 10m1 stop
Multiple Airlines Logo
11:20 - 23:42SYD-ORD
29h 22m2 stops
$1,599Multiple Airlines
Find Deal
Sun, 7 Dec - Fri, 12 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
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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
$1,753ANA
Find Deal
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
Find Deal
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
$1,966Air 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

Fiji Airways flights from Chicago O'Hare Intl Airport to Sydney

Our best Fiji Airways deals on Chicago O'Hare Intl Airport 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

ANA flights from Chicago O'Hare Intl Airport to Sydney

Our best ANA deals on Chicago O'Hare Intl Airport to Sydney flight tickets
ANA
9 Mar
ORD17:25Chicago O'Hare Intl
25h 05m
1 stop
SYD10:30Sydney Kingsford Smith
8 May
SYD11:50Sydney Kingsford Smith
32h 15m
2 stops
ORD05:05Chicago O'Hare Intl
$1,753
Find similar
ANA
23 Apr
ORD17:45Chicago O'Hare Intl
34h 30m
1 stop
SYD19:15Sydney Kingsford Smith
2 May
SYD20:55Sydney Kingsford Smith
33h 00m
1 stop
ORD14:55Chicago O'Hare Intl
$1,754
Find similar
ANA
9 Mar
ORD19:35Chicago O'Hare Intl
32h 40m
2 stops
SYD20:15Sydney Kingsford Smith
8 May
SYD11:50Sydney Kingsford Smith
32h 15m
2 stops
ORD05:05Chicago O'Hare Intl
$1,759
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Chicago O'Hare Intl Airport 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 12 November 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 11/12

15:11-20:50

2 stops36h 39m

Sydney Kingsford Smith

Thu 18/12

11:20-17:36

1 stop23h 16m

$1,489

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

$1,514

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 7/12

06:50-09:00

1 stop33h 10m

Sydney Kingsford Smith

Fri 12/12

17:45-00:13

1 stop23h 28m

$1,533

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 7/12

06:50-09:00

1 stop33h 10m

Sydney Kingsford Smith

Fri 12/12

11:20-23:42

2 stops29h 22m

$1,599

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

$1,753

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

$1,966

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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How to get the cheapest flight ticket from Chicago O'Hare Intl Airport 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 March is, on average, the cheapest month to fly to Sydney from Chicago O'Hare Intl Airport, with most prices found around $1,308. If you aren’t able to travel to Sydney during the month of March, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $1,334.

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 Chicago O'Hare Intl Airport to Sydney in the afternoon for as low as $2,116. 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 $3,234 on average. Flights to Sydney from Chicago O'Hare Intl Airport 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 O'Hare Intl Airport 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 Chicago O'Hare Intl Airport for as low as $1,299 on momondo.

Can stopping save me money on Chicago O'Hare Intl Airport to Sydney flights?

You could potentially save up to 38% on your flight if you consider stops on a Chicago O'Hare Intl Airport to Sydney flight.

How have Chicago O'Hare Intl Airport to Sydney flight prices changed over time?

As of November 2025, prices for Chicago O'Hare Intl Airport to Sydney flights are approximately 53% cheaper when compared to flights at the same time last year.

When to book flights from Chicago O'Hare Intl Airport to Sydney

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

Cheap Chicago O'Hare Intl Airport to Sydney (ORD to SYD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Sydney

Direct flights

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

    A flight from Chicago O'Hare Intl to Sydney Kingsford Smith will travel around 14845.8 km. In terms of flight time, this usually takes a little over 21h 10m.

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

    Prices for flights from Chicago O'Hare Intl Airport to Sydney Kingsford Smith Airport are refreshed on a daily basis.

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

  • How old do you have to be to fly from Chicago O'Hare Intl Airport 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 O'Hare Intl Airport 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 O'Hare Intl Airport to Sydney?

Best airlines flying from Chicago O'Hare Intl Airport to Sydney

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Sydney with momondo
Airline
Rating
Free cancellation
Price
American AirlinesPriceFrom $1,313Free cancellationRating
7.2
11,048 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 Chicago to Sydney?

Finding the right flight to Sydney from Chicago is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Sydney quick and easy, saving you time and money.

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

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

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.

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