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Cheap flights from Chicago O'Hare Intl Airport to Sydney from $834

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 5/9. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Chicago O'Hare Intl Airport to Sydney

Cheap return flights

Enter your travel dates to find the best prices.
ANA Logo
19:50 - 19:10
ORD
-
SYD
32h 20m
2 stops
ANA Logo
11:45 - 14:55
SYD
-
ORD
42h 10m
1 stop
$1,763ANA
Mon, 31 Aug - Mon, 7 Sep
Multiple Airlines Logo
09:20 - 11:50
ORD
-
SYD
35h 30m
3 stops
Multiple Airlines Logo
13:15 - 00:49
SYD
-
ORD
50h 34m
3 stops
$1,764Multiple Airlines
Wed, 19 Aug - Wed, 26 Aug
Multiple Airlines Logo
09:20 - 11:50
ORD
-
SYD
35h 30m
3 stops
Multiple Airlines Logo
13:15 - 06:17
SYD
-
ORD
32h 02m
2 stops
$1,777Multiple Airlines
Mon, 31 Aug - Mon, 7 Sep
ANA Logo
11:50 - 09:25
ORD
-
SYD
30h 35m
1 stop
ANA Logo
11:45 - 14:55
SYD
-
ORD
42h 10m
1 stop
$1,784ANA
Mon, 31 Aug - Mon, 7 Sep
ANA Logo
17:50 - 20:15
ORD
-
SYD
33h 25m
2 stops
ANA Logo
12:25 - 05:20
SYD
-
ORD
33h 55m
2 stops
$1,796ANA
Wed, 4 Nov - Wed, 11 Nov
ANA Logo
19:50 - 19:10
ORD
-
SYD
32h 20m
2 stops
ANA Logo
11:45 - 04:45
SYD
-
ORD
32h 00m
2 stops
$1,797ANA
Mon, 24 Aug - Tue, 8 Sep
Multiple Airlines Logo
13:02 - 11:50
ORD
-
SYD
31h 48m
3 stops
Multiple Airlines Logo
13:15 - 12:02
SYD
-
ORD
37h 47m
3 stops
$1,801Multiple Airlines
Mon, 21 Sep - Fri, 25 Sep
Multiple Airlines Logo
09:20 - 07:05
ORD
-
SYD
30h 45m
2 stops
Multiple Airlines Logo
09:10 - 06:17
SYD
-
ORD
36h 07m
1 stop
$1,806Multiple Airlines
Wed, 5 Aug - Tue, 25 Aug
ANA Logo
16:25 - 20:15
ORD
-
SYD
34h 50m
1 stop
ANA Logo
12:25 - 07:20
SYD
-
ORD
35h 55m
1 stop
$1,807ANA
Mon, 2 Nov - Mon, 16 Nov
ANA Logo
17:45 - 20:10
ORD
-
SYD
34h 25m
1 stop
ANA Logo
12:25 - 08:20
SYD
-
ORD
35h 55m
1 stop
$1,810ANA
Thu, 22 Oct - Thu, 29 Oct

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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
31 Aug
ORD19:50Chicago O'Hare Intl
32h 20m
2 stops
SYD19:10Sydney Kingsford Smith
7 Sept
SYD11:45Sydney Kingsford Smith
42h 10m
1 stop
ORD14:55Chicago O'Hare Intl
$1,763
ANA
31 Aug
ORD11:50Chicago O'Hare Intl
30h 35m
1 stop
SYD09:25Sydney Kingsford Smith
7 Sept
SYD11:45Sydney Kingsford Smith
42h 10m
1 stop
ORD14:55Chicago O'Hare Intl
$1,784
ANA
4 Nov
ORD17:50Chicago O'Hare Intl
33h 25m
2 stops
SYD20:15Sydney Kingsford Smith
11 Nov
SYD12:25Sydney Kingsford Smith
33h 55m
2 stops
ORD05:20Chicago O'Hare Intl
$1,796

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
21 July
ORD18:28Chicago O'Hare Intl
21h 27m
1 stop
SYD06:55Sydney Kingsford Smith
31 Aug
SYD12:00Sydney Kingsford Smith
21h 29m
1 stop
ORD18:29Chicago O'Hare Intl
$2,626
Qantas Airways
11 July
ORD19:08Chicago O'Hare Intl
20h 57m
1 stop
SYD07:05Sydney Kingsford Smith
31 July
SYD09:10Sydney Kingsford Smith
21h 49m
1 stop
ORD15:59Chicago O'Hare Intl
$2,656

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 10 July 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

Cheapest return flight

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 31/8

19:50-19:10

2 stops32h 20m

Sydney Kingsford Smith

Mon 7/9

11:45-14:55

1 stop42h 10m

$1,763

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 19/8

09:20-11:50

3 stops35h 30m

Sydney Kingsford Smith

Wed 26/8

13:15-00:49

3 stops50h 34m

$1,764

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 31/8

09:20-11:50

3 stops35h 30m

Sydney Kingsford Smith

Mon 7/9

13:15-06:17

2 stops32h 02m

$1,777

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 31/8

11:50-09:25

1 stop30h 35m

Sydney Kingsford Smith

Mon 7/9

11:45-14:55

1 stop42h 10m

$1,784

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 4/11

17:50-20:15

2 stops33h 25m

Sydney Kingsford Smith

Wed 11/11

12:25-05:20

2 stops33h 55m

$1,796
Fastest return journey

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 24/8

19:50-19:10

2 stops32h 20m

Sydney Kingsford Smith

Tue 8/9

11:45-04:45

2 stops32h 00m

$1,797

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 21/9

13:02-11:50

3 stops31h 48m

Sydney Kingsford Smith

Fri 25/9

13:15-12:02

3 stops37h 47m

$1,801

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 5/8

09:20-07:05

2 stops30h 45m

Sydney Kingsford Smith

Tue 25/8

09:10-06:17

1 stop36h 07m

$1,806

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 2/11

16:25-20:15

1 stop34h 50m

Sydney Kingsford Smith

Mon 16/11

12:25-07:20

1 stop35h 55m

$1,807

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 22/10

17:45-20:10

1 stop34h 25m

Sydney Kingsford Smith

Thu 29/10

12:25-08:20

1 stop35h 55m

$1,810

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 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 November is, on average, the cheapest month to fly to Sydney from Chicago O'Hare Intl Airport, with most prices found around $1,690. If you aren’t able to travel to Sydney during the month of November, then flying in June is also cheap. Prices for this month can be found on momondo for an average of $1,846.

How far in advance should I book a flight from Chicago O'Hare Intl Airport 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 $2,038 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 $1,708 on momondo.

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

As of July 2026, prices for Chicago O'Hare Intl Airport to Sydney flights are approximately 136% more expensive 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 30m

Direct flights

None
The fastest flight from Chicago O'Hare Intl Airport to Sydney takes 21h 30m
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

Frequently asked questions about flying from Chicago O'Hare Intl Airport to Sydney

  • 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 30m.

  • 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 $2,118Free cancellationRating
7.5
1,058 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
Manly
Coogee
Leura
Lithgow
Cronulla
Bondi Beach
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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