Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Chicago to Sydney from $726

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 to Sydney departing on 10/6. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.
Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customise your results.
Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.
Price Alerts
Price Alerts
Not ready to book? to track prices.

Find the cheapest flights from Chicago to Sydney

Cheap return flights

KAYAK's recommended return flight deals from the most popular airlines that fly from Chicago to Sydney.
11:53 - 11:45ORD-SYD
32h 52m2 stops
13:15 - 06:42SYD-ORD
32h 27m2 stops
$1,548
Find Deal
Tue, 6 May - Tue, 13 May
09:30 - 11:45ORD-SYD
35h 15m3 stops
13:15 - 06:42SYD-ORD
32h 27m2 stops
$1,567
Find Deal
Tue, 6 May - Tue, 13 May
08:40 - 07:20ORD-SYD
31h 40m2 stops
09:20 - 08:02SYD-ORD
37h 42m2 stops
$1,635Air Canada
Find Deal
Tue, 6 May - Tue, 13 May
08:45 - 07:20ORD-SYD
31h 35m2 stops
09:20 - 08:02SYD-ORD
37h 42m2 stops
$1,640Air Canada
Find Deal
Sun, 11 May - Sun, 18 May
18:45 - 11:45ORD-SYD
26h 00m2 stops
06:15 - 20:24SYD-ORD
29h 09m2 stops
$1,865Fiji Airways
Find Deal
Tue, 6 May - Tue, 13 May
18:45 - 11:45ORD-SYD
26h 00m2 stops
13:45 - 20:24SYD-ORD
21h 39m2 stops
$1,878Fiji Airways
Find Deal
Sat, 10 May - Sat, 17 May
17:51 - 07:05ORD-SYD
22h 14m1 stop
09:10 - 17:53SYD-ORD
23h 43m1 stop
$2,141Qantas Airways
Find Deal
Tue, 17 Jun - Tue, 24 Jun
18:45 - 07:05ORD-SYD
21h 20m1 stop
09:10 - 14:17SYD-ORD
20h 07m1 stop
$2,150Qantas Airways
Find Deal
Mon, 7 Jul - Wed, 23 Jul
09:10 - 07:00ORD-SYD
30h 50m1 stop
10:20 - 14:55SYD-ORD
19h 35m1 stop
$2,309United Airlines
Find Deal
Sun, 8 Jun - Sun, 22 Jun
19:40 - 07:00ORD-SYD
20h 20m1 stop
10:20 - 00:25SYD-ORD
29h 05m2 stops
$2,317United Airlines
Find Deal
Sun, 8 Jun - Tue, 24 Jun

ANA flights from Chicago to Sydney

Our best ANA deals on Chicago to Sydney flight tickets
ANA
26 Aug
ORD17:45Chicago O'Hare Intl
34h 30m
1 stop
SYD19:15Sydney Kingsford Smith
2 Sept
SYD11:50Sydney Kingsford Smith
32h 11m
2 stops
ORD05:01Chicago O'Hare Intl
ANA
8 Sept
ORD17:45Chicago O'Hare Intl
34h 30m
1 stop
SYD19:15Sydney Kingsford Smith
18 Sept
SYD11:50Sydney Kingsford Smith
35h 50m
1 stop
ORD08:40Chicago O'Hare Intl
ANA
8 Sept
ORD17:00Chicago O'Hare Intl
35h 15m
2 stops
SYD19:15Sydney Kingsford Smith
18 Sept
SYD11:50Sydney Kingsford Smith
35h 50m
1 stop
ORD08:40Chicago O'Hare Intl

Delta flights from Chicago to Sydney

Our best Delta deals on Chicago to Sydney flight tickets
Delta
7 Apr
ORD13:26Chicago O'Hare Intl
26h 09m
2 stops
SYD06:35Sydney Kingsford Smith
7 May
SYD09:25Sydney Kingsford Smith
25h 56m
2 stops
ORD20:21Chicago O'Hare Intl
Delta
8 June
MDW12:41Chicago Midway
26h 54m
2 stops
SYD06:35Sydney Kingsford Smith
23 June
SYD09:25Sydney Kingsford Smith
23h 32m
2 stops
MDW17:57Chicago Midway
Delta
24 July
MDW15:40Chicago Midway
23h 55m
2 stops
SYD06:35Sydney Kingsford Smith
2 Aug
SYD09:25Sydney Kingsford Smith
27h 22m
2 stops
MDW21:47Chicago Midway

See travel insights to Sydney from

How to get the cheapest flight ticket from Chicago 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 and Sydney?

What is the cheapest month to fly to Sydney?

The month of August is, on average, the cheapest month to fly to Sydney from Chicago, with most prices found around $1,370. If you aren’t able to travel to Sydney during the month of August, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $1,438.

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 $1,872. The most expensive day to fly to Sydney is Tuesday, with ticket prices averaging around $2,571.

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 to Sydney in the afternoon for as low as $2,190. 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 $3,348 on average. Flights to Sydney from Chicago 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 when booking 25 weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,776 when searching 25 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Chicago for as low as $1,337 on momondo.

How have Chicago to Sydney flight prices changed over time?

As of March 2025, prices for Chicago to Sydney flights are approximately 53% cheaper when compared to flights at the same time last year.

When to book flights from Chicago to Sydney

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

Cheap Chicago to Sydney (CHI to SYD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago to Sydney

Best price found

$726

Fastest flight time

20h 20m

Direct flights

None

Airports in Sydney

1 airport
The best one-way flight to Sydney from Chicago in the past 72 hours is $726. The best return flight deal from Chicago to Sydney found on momondo in the last 72 hours is $1,548.
The fastest flight from Chicago to Sydney takes 20h 20m
There are no direct flights from Chicago to Sydney. Popular non-direct routes for this connection are Chicago O'Hare Intl Airport - Sydney Kingsford Smith Airport and Chicago Midway Airport - Sydney Kingsford Smith Airport.
There is 1 airport near Sydney: Sydney Kingsford Smith (SYD)

  • How far is Chicago to Sydney Kingsford Smith by plane?

    Chicago and Sydney Kingsford Smith are 14866.2 km apart from one another. A reasonable flight in good conditions will take 20h 20m.

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

    Prices for flights from Chicago to Sydney Kingsford Smith Airport were last updated today.

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

  • How old do you have to be to fly from Chicago to Sydney Kingsford Smith Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Chicago 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 to Sydney?


Best airlines flying from Chicago to Sydney

Compare and see reviews for airlines that fly from Chicago to Sydney with momondo
Airline
Rating
Free cancellation
Price
Qantas AirwaysPriceFrom $1,353Free cancellationRating
7.5
811 reviews
Search Qantas Airways flights
Air CanadaPriceFrom $1,793Free cancellationRating
7.0
8,986 reviews
Search Air Canada flights
United AirlinesPriceFrom $1,907Free cancellationRating
7.4
8,603 reviews
Search United Airlines flights

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Katoomba
Terrigal
Lithgow
Penrith
Leura
Manly
Coogee
Cronulla
Bondi Beach
Randwick
Charlestown
Newport
Swansea

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Sydney?

It is quick and easy to find Chicago to Sydney flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Sydney that suits you.

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

Yes. momondo enables you to select and highlight flights to Sydney from Chicago with this policy.

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.


An easier way to manage your Sydney trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
From?
To?
Wed 2/4
Wed 9/4

Find better results for your trip to Australia