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Cheap flights from Chicago O'Hare Intl Airport to Sydney from $764

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 4/2. 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 O'Hare Intl Airport to Sydney

Cheap return flights

Multiple Airlines Logo
12:28 - 08:05ORD-SYD
27h 37m2 stops
Multiple Airlines Logo
14:05 - 01:11SYD-ORD
27h 06m2 stops
$1,611Multiple Airlines
Find Deal
Mon, 20 Oct - Sun, 2 Nov
Fiji Airways Logo
16:45 - 12:30ORD-SYD
26h 45m2 stops
Fiji Airways Logo
14:10 - 19:18SYD-ORD
22h 08m2 stops
$1,652Fiji Airways
Find Deal
Sat, 28 Feb - Sat, 7 Mar
Multiple Airlines Logo
05:05 - 09:00ORD-SYD
35h 55m2 stops
Multiple Airlines Logo
14:05 - 00:11SYD-ORD
27h 06m2 stops
$1,656Multiple Airlines
Find Deal
Mon, 27 Oct - Sun, 9 Nov
ANA Logo
16:25 - 20:15ORD-SYD
34h 50m1 stop
ANA Logo
12:25 - 08:54SYD-ORD
37h 29m2 stops
$1,692ANA
Find Deal
Mon, 16 Feb - Sun, 1 Mar
Hawaiian Airlines Logo
14:00 - 19:45ORD-SYD
36h 45m2 stops
Hawaiian Airlines Logo
21:40 - 13:04SYD-ORD
32h 24m2 stops
$1,701Hawaiian Airlines
Find Deal
Tue, 17 Feb - Tue, 3 Mar
Hawaiian Airlines Logo
14:00 - 19:45ORD-SYD
36h 45m2 stops
Hawaiian Airlines Logo
21:40 - 13:04SYD-ORD
31h 24m2 stops
$1,703Hawaiian Airlines
Find Deal
Tue, 24 Feb - Tue, 10 Mar
ANA Logo
16:25 - 20:15ORD-SYD
34h 50m1 stop
ANA Logo
12:25 - 09:37SYD-ORD
37h 12m2 stops
$1,715ANA
Find Deal
Tue, 3 Mar - Wed, 18 Mar
ANA Logo
07:10 - 20:15ORD-SYD
44h 05m2 stops
ANA Logo
12:25 - 09:37SYD-ORD
37h 12m2 stops
$1,721ANA
Find Deal
Tue, 3 Mar - Wed, 18 Mar
Hawaiian Airlines Logo
14:00 - 19:45ORD-SYD
36h 45m2 stops
Hawaiian Airlines Logo
21:40 - 13:04SYD-ORD
32h 24m2 stops
$1,733Hawaiian Airlines
Find Deal
Wed, 4 Feb - Fri, 13 Feb
ANA Logo
16:25 - 20:15ORD-SYD
34h 50m1 stop
ANA Logo
12:25 - 07:25SYD-ORD
36h 00m2 stops
$1,737ANA
Find Deal
Mon, 16 Feb - Sun, 1 Mar

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
16 Feb
ORD16:25Chicago O'Hare Intl
34h 50m
1 stop
SYD20:15Sydney Kingsford Smith
1 Mar
SYD12:25Sydney Kingsford Smith
37h 29m
2 stops
ORD08:54Chicago O'Hare Intl
$1,692
Find similar
ANA
3 Mar
ORD16:25Chicago O'Hare Intl
34h 50m
1 stop
SYD20:15Sydney Kingsford Smith
18 Mar
SYD12:25Sydney Kingsford Smith
37h 12m
2 stops
ORD09:37Chicago O'Hare Intl
$1,715
Find similar
ANA
3 Mar
ORD07:10Chicago O'Hare Intl
44h 05m
2 stops
SYD20:15Sydney Kingsford Smith
18 Mar
SYD12:25Sydney Kingsford Smith
37h 12m
2 stops
ORD09:37Chicago O'Hare Intl
$1,721
Find similar

Hawaiian Airlines flights from Chicago O'Hare Intl Airport to Sydney

Our best Hawaiian Airlines deals on Chicago O'Hare Intl Airport to Sydney flight tickets
Hawaiian Airlines
17 Feb
ORD14:00Chicago O'Hare Intl
36h 45m
2 stops
SYD19:45Sydney Kingsford Smith
3 Mar
SYD21:40Sydney Kingsford Smith
32h 24m
2 stops
ORD13:04Chicago O'Hare Intl
$1,701
Find similar
Hawaiian Airlines
24 Feb
ORD14:00Chicago O'Hare Intl
36h 45m
2 stops
SYD19:45Sydney Kingsford Smith
10 Mar
SYD21:40Sydney Kingsford Smith
31h 24m
2 stops
ORD13:04Chicago O'Hare Intl
$1,703
Find similar
Hawaiian Airlines
4 Feb
ORD14:00Chicago O'Hare Intl
36h 45m
2 stops
SYD19:45Sydney Kingsford Smith
13 Feb
SYD21:40Sydney Kingsford Smith
32h 24m
2 stops
ORD13:04Chicago O'Hare Intl
$1,733
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 18 September 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

Mon 20/10

12:28-08:05

2 stops27h 37m

Sydney Kingsford Smith

Sun 2/11

14:05-01:11

2 stops27h 06m

$1,611

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 28/2

16:45-12:30

2 stops26h 45m

Sydney Kingsford Smith

Sat 7/3

14:10-19:18

2 stops22h 08m

$1,652

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 27/10

05:05-09:00

2 stops35h 55m

Sydney Kingsford Smith

Sun 9/11

14:05-00:11

2 stops27h 06m

$1,656

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 16/2

16:25-20:15

1 stop34h 50m

Sydney Kingsford Smith

Sun 1/3

12:25-08:54

2 stops37h 29m

$1,692

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 17/2

14:00-19:45

2 stops36h 45m

Sydney Kingsford Smith

Tue 3/3

21:40-13:04

2 stops32h 24m

$1,701

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 24/2

14:00-19:45

2 stops36h 45m

Sydney Kingsford Smith

Tue 10/3

21:40-13:04

2 stops31h 24m

$1,703

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 3/3

16:25-20:15

1 stop34h 50m

Sydney Kingsford Smith

Wed 18/3

12:25-09:37

2 stops37h 12m

$1,715

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 3/3

07:10-20:15

2 stops44h 05m

Sydney Kingsford Smith

Wed 18/3

12:25-09:37

2 stops37h 12m

$1,721

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 4/2

14:00-19:45

2 stops36h 45m

Sydney Kingsford Smith

Fri 13/2

21:40-13:04

2 stops32h 24m

$1,733

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 16/2

16:25-20:15

1 stop34h 50m

Sydney Kingsford Smith

Sun 1/3

12:25-07:25

2 stops36h 00m

$1,737

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 typical price of a round-trip flight between Chicago O'Hare Intl Airport and Sydney?

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 $1,283. 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 $1,306.

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 $1,769. The most expensive day to fly to Sydney is Tuesday, with ticket prices averaging around $2,430.

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 $2,070. 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 $3,164 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 $1,656 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 $1,288 on momondo.

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

You could potentially save up to 15% 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 September 2025, prices for Chicago O'Hare Intl Airport to Sydney flights are approximately 63% 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 25h 05m.

  • 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
Air CanadaPriceFrom $1,246Free cancellationRating
7.1
10,000 reviews
Search Air Canada flights
Qantas AirwaysPriceFrom $1,310Free cancellationRating
7.5
907 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
Randwick
Cronulla
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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