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Cheap flights from Chicago O'Hare Intl Airport to Sydney from $714

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 25/2. 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

Enter your travel dates to find the best prices.
Qantas Airways Logo
14:33 - 09:00
ORD
-
SYD
25h 27m
1 stop
Qantas Airways Logo
07:05 - 14:53
SYD
-
ORD
24h 48m
2 stops
$1,361Qantas Airways
Tue, 17 Feb - Wed, 4 Mar
Qantas Airways Logo
13:24 - 09:00
ORD
-
SYD
26h 36m
1 stop
Qantas Airways Logo
19:15 - 14:53
SYD
-
ORD
36h 38m
2 stops
$1,391Qantas Airways
Mon, 23 Feb - Mon, 2 Mar
Qantas Airways Logo
17:10 - 20:50
ORD
-
SYD
34h 40m
2 stops
Qantas Airways Logo
11:20 - 14:53
SYD
-
ORD
20h 33m
1 stop
$1,393Qantas Airways
Wed, 11 Feb - Sun, 1 Mar
Qantas Airways Logo
15:23 - 20:50
ORD
-
SYD
36h 27m
2 stops
Qantas Airways Logo
11:20 - 14:53
SYD
-
ORD
20h 33m
1 stop
$1,396Qantas Airways
Wed, 11 Feb - Sat, 28 Feb
Qantas Airways Logo
18:40 - 17:40
ORD
-
SYD
30h 00m
2 stops
Qantas Airways Logo
11:20 - 17:45
SYD
-
ORD
22h 25m
1 stop
$1,409Qantas Airways
Sun, 8 Feb - Tue, 10 Mar
Qantas Airways Logo
17:37 - 17:40
ORD
-
SYD
31h 03m
2 stops
Qantas Airways Logo
11:20 - 14:53
SYD
-
ORD
20h 33m
1 stop
$1,410Qantas Airways
Sat, 7 Feb - Sat, 14 Feb
Qantas Airways Logo
17:10 - 20:50
ORD
-
SYD
34h 40m
2 stops
Qantas Airways Logo
11:20 - 16:37
SYD
-
ORD
22h 17m
1 stop
$1,428Qantas Airways
Wed, 11 Feb - Fri, 27 Feb
Qantas Airways Logo
18:40 - 17:40
ORD
-
SYD
30h 00m
2 stops
Qantas Airways Logo
11:20 - 14:53
SYD
-
ORD
20h 33m
1 stop
$1,461Qantas Airways
Mon, 9 Feb - Thu, 26 Feb
Qantas Airways Logo
18:40 - 20:50
ORD
-
SYD
33h 10m
2 stops
Qantas Airways Logo
11:20 - 23:47
SYD
-
ORD
29h 27m
1 stop
$1,490Qantas Airways
Sun, 8 Feb - Thu, 26 Feb
Multiple Airlines Logo
06:00 - 07:30
ORD
-
SYD
34h 30m
1 stop
Multiple Airlines Logo
13:15 - 06:46
SYD
-
ORD
32h 31m
2 stops
$1,513Multiple Airlines
Tue, 12 May - Thu, 21 May

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

Our best Qantas Airways deals on Chicago O'Hare Intl Airport to Sydney flight tickets
Qantas Airways
1 Feb
ORD17:10Chicago O'Hare Intl
28h 40m
2 stops
SYD14:50Sydney Kingsford Smith
14 Feb
SYD11:20Sydney Kingsford Smith
27h 15m
1 stop
ORD21:35Chicago O'Hare Intl
$1,375
Qantas Airways
5 Feb
ORD18:40Chicago O'Hare Intl
27h 10m
2 stops
SYD14:50Sydney Kingsford Smith
16 May
SYD09:10Sydney Kingsford Smith
23h 36m
1 stop
ORD17:46Chicago O'Hare Intl
$1,377
Qantas Airways
23 Feb
ORD09:25Chicago O'Hare Intl
30h 35m
1 stop
SYD09:00Sydney Kingsford Smith
2 Mar
SYD19:15Sydney Kingsford Smith
36h 38m
2 stops
ORD14:53Chicago O'Hare Intl
$1,391

Air Canada flights from Chicago O'Hare Intl Airport to Sydney

Our best Air Canada deals on Chicago O'Hare Intl Airport to Sydney flight tickets
Air Canada
5 May
ORD15:40Chicago O'Hare Intl
24h 40m
1 stop
SYD07:20Sydney Kingsford Smith
26 May
SYD09:20Sydney Kingsford Smith
20h 25m
1 stop
ORD14:45Chicago O'Hare Intl
$1,617
Air Canada
5 May
ORD15:40Chicago O'Hare Intl
24h 40m
1 stop
SYD07:20Sydney Kingsford Smith
26 May
SYD09:20Sydney Kingsford Smith
25h 48m
2 stops
ORD20:08Chicago O'Hare Intl
$1,623
Air Canada
24 Apr
ORD12:50Chicago O'Hare Intl
27h 30m
2 stops
SYD07:20Sydney Kingsford Smith
29 Apr
SYD09:20Sydney Kingsford Smith
20h 23m
1 stop
ORD14:43Chicago O'Hare Intl
$1,624

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 27 January 2026.
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

Tue 17/2

14:33-09:00

1 stop25h 27m

Sydney Kingsford Smith

Wed 4/3

07:05-14:53

2 stops24h 48m

$1,361

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 23/2

13:24-09:00

1 stop26h 36m

Sydney Kingsford Smith

Mon 2/3

19:15-14:53

2 stops36h 38m

$1,391

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 11/2

17:10-20:50

2 stops34h 40m

Sydney Kingsford Smith

Sun 1/3

11:20-14:53

1 stop20h 33m

$1,393

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 11/2

15:23-20:50

2 stops36h 27m

Sydney Kingsford Smith

Sat 28/2

11:20-14:53

1 stop20h 33m

$1,396

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 8/2

18:40-17:40

2 stops30h 00m

Sydney Kingsford Smith

Tue 10/3

11:20-17:45

1 stop22h 25m

$1,409

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 7/2

17:37-17:40

2 stops31h 03m

Sydney Kingsford Smith

Sat 14/2

11:20-14:53

1 stop20h 33m

$1,410

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 11/2

17:10-20:50

2 stops34h 40m

Sydney Kingsford Smith

Fri 27/2

11:20-16:37

1 stop22h 17m

$1,428

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 9/2

18:40-17:40

2 stops30h 00m

Sydney Kingsford Smith

Thu 26/2

11:20-14:53

1 stop20h 33m

$1,461

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 8/2

18:40-20:50

2 stops33h 10m

Sydney Kingsford Smith

Thu 26/2

11:20-23:47

1 stop29h 27m

$1,490

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 12/5

06:00-07:30

1 stop34h 30m

Sydney Kingsford Smith

Thu 21/5

13:15-06:46

2 stops32h 31m

$1,513

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Sydney from

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 May is, on average, the cheapest month to fly to Sydney from Chicago O'Hare Intl Airport, with most prices found around $1,228. If you aren’t able to travel to Sydney during the month of May, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $1,231.

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 $1,589 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 $1,316 on momondo.

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

You could potentially save up to 20% 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 January 2026, prices for Chicago O'Hare Intl Airport to Sydney flights are approximately 5% 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

Fastest flight time

21h 20m

Direct flights

None
The fastest flight from Chicago O'Hare Intl Airport to Sydney takes 21h 20m
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.
Search flight deals

  • 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 20m.

  • 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
Qantas AirwaysPriceFrom $1,263Free cancellationRating
7.5
978 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
Coogee
Bondi Beach
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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