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Cheap flights from Chicago O'Hare Intl Airport to Sydney from $724

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 21/10. 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

Logo
07:05 - 11:45ORD-SYD
37h 40m2 stops
Logo
13:15 - 05:40SYD-ORD
31h 25m2 stops
$1,683
Find Deal
Wed, 20 Aug - Wed, 27 Aug
Logo
06:40 - 11:45ORD-SYD
38h 05m2 stops
Logo
13:15 - 05:40SYD-ORD
31h 25m2 stops
$1,739
Find Deal
Wed, 6 Aug - Wed, 13 Aug
Logo
07:05 - 11:45ORD-SYD
37h 40m2 stops
Logo
13:15 - 05:40SYD-ORD
31h 25m2 stops
$1,741
Find Deal
Tue, 19 Aug - Tue, 26 Aug
Logo
07:05 - 11:45ORD-SYD
37h 40m2 stops
Logo
13:15 - 05:40SYD-ORD
31h 25m2 stops
$1,756
Find Deal
Wed, 20 Aug - Mon, 25 Aug
Logo
07:05 - 22:10ORD-SYD
48h 05m2 stops
Logo
13:15 - 05:40SYD-ORD
31h 25m2 stops
$1,758
Find Deal
Wed, 20 Aug - Wed, 27 Aug
Logo
06:40 - 19:15ORD-SYD
45h 35m2 stops
Logo
11:50 - 05:40SYD-ORD
32h 50m2 stops
$1,764
Find Deal
Sun, 3 Aug - Wed, 20 Aug
ANA Logo
17:45 - 20:15ORD-SYD
34h 30m1 stop
ANA Logo
21:45 - 07:20SYD-ORD
26h 35m1 stop
$1,776ANA
Find Deal
Tue, 14 Oct - Tue, 4 Nov
ANA Logo
17:45 - 20:15ORD-SYD
34h 30m1 stop
ANA Logo
12:25 - 05:16SYD-ORD
33h 51m2 stops
$1,790ANA
Find Deal
Tue, 14 Oct - Tue, 4 Nov
ANA Logo
17:45 - 20:15ORD-SYD
34h 30m1 stop
ANA Logo
21:45 - 07:20SYD-ORD
26h 35m1 stop
$1,794ANA
Find Deal
Mon, 20 Oct - Sun, 2 Nov
Fiji Airways Logo
18:30 - 11:45ORD-SYD
26h 15m2 stops
Fiji Airways Logo
06:00 - 21:24SYD-ORD
30h 24m2 stops
$1,869Fiji Airways
Find Deal
Sat, 6 Sep - Tue, 16 Sep

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
14 Oct
ORD17:45Chicago O'Hare Intl
34h 30m
1 stop
SYD20:15Sydney Kingsford Smith
4 Nov
SYD21:45Sydney Kingsford Smith
26h 35m
1 stop
ORD07:20Chicago O'Hare Intl
$1,776
Find similar
ANA
14 Oct
ORD17:45Chicago O'Hare Intl
34h 30m
1 stop
SYD20:15Sydney Kingsford Smith
4 Nov
SYD12:25Sydney Kingsford Smith
33h 51m
2 stops
ORD05:16Chicago O'Hare Intl
$1,790
Find similar
ANA
20 Oct
ORD17:45Chicago O'Hare Intl
34h 30m
1 stop
SYD20:15Sydney Kingsford Smith
2 Nov
SYD21:45Sydney Kingsford Smith
26h 35m
1 stop
ORD07:20Chicago O'Hare Intl
$1,794
Find similar

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

Our best Alaska Airlines deals on Chicago O'Hare Intl Airport to Sydney flight tickets
Alaska Airlines
23 July
ORD20:42Chicago O'Hare Intl
32h 03m
2 stops
SYD19:45Sydney Kingsford Smith
15 Aug
SYD21:40Sydney Kingsford Smith
35h 38m
2 stops
ORD18:18Chicago O'Hare Intl
$2,560
Find similar
Alaska Airlines
23 July
ORD19:18Chicago O'Hare Intl
33h 27m
2 stops
SYD19:45Sydney Kingsford Smith
15 Aug
SYD21:40Sydney Kingsford Smith
35h 38m
2 stops
ORD18:18Chicago O'Hare Intl
$2,602
Find similar
Alaska Airlines
23 July
ORD20:42Chicago O'Hare Intl
32h 03m
2 stops
SYD19:45Sydney Kingsford Smith
15 Aug
SYD21:40Sydney Kingsford Smith
35h 38m
2 stops
ORD18:18Chicago O'Hare Intl
$2,666
Find similar

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 March is, on average, the cheapest month to fly to Sydney from Chicago O'Hare Intl Airport, with most prices found around $1,306. 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 $1,328.

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 $1,799. The most expensive day to fly to Sydney is Tuesday, with ticket prices averaging around $2,471.

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 $2,105. 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 $3,218 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 $1,666 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 $1,389 on momondo.

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

You could potentially save up to 9% 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 July 2025, prices for Chicago O'Hare Intl Airport to Sydney flights are approximately 62% 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

Best price found

$724

Fastest flight time

24h 40m

Direct flights

None

Airports in Sydney

1 airport
The best one-way flight to Sydney from Chicago O'Hare Intl Airport in the past 72 hours is $724. The best return flight deal from Chicago O'Hare Intl Airport to Sydney found on momondo in the last 72 hours is $1,683.
The fastest flight from Chicago O'Hare Intl Airport to Sydney takes 24h 40m
There are no direct flights from Chicago O'Hare Intl Airport to Sydney. Popular non-direct route for this connection is Chicago O'Hare Intl Airport - Sydney Kingsford Smith Airport.
There is 1 airport near Sydney: Sydney Kingsford Smith (SYD)
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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 24h 40m.

  • 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 $1,301Free cancellationRating
7.5
877 reviews
Search Qantas Airways flights
Air CanadaPriceFrom $1,665Free cancellationRating
7.1
9,725 reviews
Search Air Canada flights

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Wollongong
Parramatta
Terrigal
Katoomba
Lithgow
Penrith
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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