Cheap Flights from Chicago (ORD) to Sydney (SYD)

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Compare Chicago O'Hare International to Sydney flight deals

Find the cheapest month or even day of the year to fly to Sydney

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Flight deals from Chicago O'Hare International to Sydney

Looking for a cheap last-minute deal or the best return flight from Chicago O'Hare International Airport to Sydney Airport? If you want to travel next month, return fares start from $1,439. Find the lowest prices on one-way and return tickets right here.

Sydney.$1,439 per passenger.Departing Mon, 14 Sep, returning Wed, 23 Sep.Return flight with Frontier Airlines and Fiji Airways.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Mon, 14 Sep, arriving in Sydney.Inbound indirect flight with Fiji Airways, departs from Sydney on Wed, 23 Sep, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,439, select.

Sydney.$1,583 per passenger.Departing Tue, 3 Nov, returning Tue, 10 Nov.Return flight with Korean Air and Fiji Airways.Outbound indirect flight with Korean Air, departs from Chicago O'Hare International on Tue, 3 Nov, arriving in Sydney.Inbound indirect flight with Fiji Airways, departs from Sydney on Tue, 10 Nov, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,583, select.

Sydney.$1,670 per passenger.Departing Wed, 30 Sep, returning Wed, 7 Oct.Return flight with Frontier Airlines and Fiji Airways.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Wed, 30 Sep, arriving in Sydney.Inbound indirect flight with Fiji Airways, departs from Sydney on Wed, 7 Oct, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,670, select.

Sydney.$1,765 per passenger.Departing Thu, 3 Dec, returning Sat, 27 Feb.Return flight with Alaska Airlines and Fiji Airways.Outbound indirect flight with Alaska Airlines, departs from Chicago O'Hare International on Thu, 3 Dec, arriving in Sydney.Inbound indirect flight with Fiji Airways, departs from Sydney on Sat, 27 Feb, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,765, select.

Sydney.$1,774 per passenger.Departing Sun, 25 Oct, returning Sun, 8 Nov.Return flight with ANA (All Nippon Airways).Outbound indirect flight with ANA (All Nippon Airways), departs from Chicago O'Hare International on Sun, 25 Oct, arriving in Sydney.Inbound indirect flight with ANA (All Nippon Airways), departs from Sydney on Sun, 8 Nov, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,774, select.

Sydney.$1,797 per passenger.Departing Fri, 16 Apr, returning Sun, 25 Apr.Return flight with ANA (All Nippon Airways).Outbound indirect flight with ANA (All Nippon Airways), departs from Chicago O'Hare International on Fri, 16 Apr, arriving in Sydney.Inbound indirect flight with ANA (All Nippon Airways), departs from Sydney on Sun, 25 Apr, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,797, select.

Sydney.$1,801 per passenger.Departing Sun, 18 Oct, returning Sat, 31 Oct.Return flight with ANA (All Nippon Airways).Outbound indirect flight with ANA (All Nippon Airways), departs from Chicago O'Hare International on Sun, 18 Oct, arriving in Sydney.Inbound indirect flight with ANA (All Nippon Airways), departs from Sydney on Sat, 31 Oct, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,801, select.

Sydney.$1,809 per passenger.Departing Tue, 9 Mar, returning Tue, 16 Mar.Return flight with Air New Zealand.Outbound indirect flight with Air New Zealand, departs from Chicago O'Hare International on Tue, 9 Mar, arriving in Sydney.Inbound indirect flight with Air New Zealand, departs from Sydney on Tue, 16 Mar, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,809, select.

Sydney.$1,813 per passenger.Departing Mon, 10 May, returning Sun, 30 May.Return flight with ANA (All Nippon Airways).Outbound indirect flight with ANA (All Nippon Airways), departs from Chicago O'Hare International on Mon, 10 May, arriving in Sydney.Inbound indirect flight with ANA (All Nippon Airways), departs from Sydney on Sun, 30 May, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,813, select.

Sydney.$1,820 per passenger.Departing Wed, 10 Feb, returning Thu, 18 Feb.Return flight with Philippine Airlines.Outbound indirect flight with Philippine Airlines, departs from Chicago O'Hare International on Wed, 10 Feb, arriving in Sydney.Inbound indirect flight with Philippine Airlines, departs from Sydney on Thu, 18 Feb, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,820, select.

Sydney.$1,842 per passenger.Departing Tue, 25 May, returning Wed, 2 Jun.Return flight with ANA (All Nippon Airways).Outbound indirect flight with ANA (All Nippon Airways), departs from Chicago O'Hare International on Tue, 25 May, arriving in Sydney.Inbound indirect flight with ANA (All Nippon Airways), departs from Sydney on Wed, 2 Jun, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,842, select.

Sydney.$1,845 per passenger.Departing Tue, 1 Jun, returning Tue, 15 Jun.Return flight with ANA (All Nippon Airways).Outbound indirect flight with ANA (All Nippon Airways), departs from Chicago O'Hare International on Tue, 1 Jun, arriving in Sydney.Inbound indirect flight with ANA (All Nippon Airways), departs from Sydney on Tue, 15 Jun, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,845, select.

Sydney.$1,856 per passenger.Departing Thu, 1 Jul, returning Thu, 8 Jul.Return flight with ANA (All Nippon Airways).Outbound indirect flight with ANA (All Nippon Airways), departs from Chicago O'Hare International on Thu, 1 Jul, arriving in Sydney.Inbound indirect flight with ANA (All Nippon Airways), departs from Sydney on Thu, 8 Jul, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,856, select.

Sydney.$1,861 per passenger.Departing Mon, 23 Nov, returning Thu, 3 Dec.Return flight with Air New Zealand.Outbound indirect flight with Air New Zealand, departs from Chicago O'Hare International on Mon, 23 Nov, arriving in Sydney.Inbound indirect flight with Air New Zealand, departs from Sydney on Thu, 3 Dec, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,861, select.

Sydney.$1,865 per passenger.Departing Wed, 10 Feb, returning Mon, 1 Mar.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Chicago O'Hare International on Wed, 10 Feb, arriving in Sydney.Inbound indirect flight with Air Canada, departs from Sydney on Mon, 1 Mar, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,865, select.

Sydney.$1,865 per passenger.Departing Mon, 31 Aug, returning Sun, 6 Sep.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Chicago O'Hare International on Mon, 31 Aug, arriving in Sydney.Inbound indirect flight with Air Canada, departs from Sydney on Sun, 6 Sep, arriving in Chicago O'Hare International.Price includes taxes and charges.From $1,865, select.

Find the cheapest month to fly from Chicago O'Hare International to Sydney

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Chicago O'Hare International to Sydney flights are currently cheapest in September.

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Chicago O'Hare International to Sydney: Alternative routes

Compare routes from Chicago O'Hare International to Sydney below. You may find an airport to fly into that's cheaper, faster, or easier than Sydney.

Sydney

9km from central Sydney

ClosestCheapest

from $1,439

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Wollongong

86km from central Sydney

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Chicago to Sydney: Flight information

The things to know before you go.

Cheapest flight found	$1,439
Cheapest month to fly	September

Finding cheap flights from Chicago O'Hare International to Sydney: Frequently asked questions

How much are return flights from Chicago O'Hare International to Sydney?

The best price we found for a return flight from Chicago O'Hare International to Sydney is $1,439. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

Which airlines fly direct from Chicago O'Hare International to Sydney?

Currently, there are no airlines that fly direct from Chicago O'Hare International to Sydney. But we found flights with one or more stops from $1,439.

How many flights are there a week from Chicago O'Hare International to Sydney?

As of August 2026, there are no flights flying from Chicago O'Hare International to Sydney.

When is the cheapest time to fly from Chicago O'Hare International to Sydney?

The cheapest month to fly from Chicago O'Hare International to Sydney is usually September.

Which upcoming date is cheapest to fly from Chicago O'Hare International Airport to Sydney Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Chicago O'Hare International Airport to Sydney Airport on Monday, 14 September 2026.

Can I get a direct flight from Chicago O'Hare International Airport to Sydney Airport?

No airlines currently offer direct flights between Chicago O'Hare International Airport and Sydney Airport. Most routes have one or more stops.

How can I find the best flight deal to Sydney?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Sydney but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Sydney?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Sydney is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from Chicago O'Hare International Airport to Sydney with?

Currently, Frontier Airlines offers the cheapest flight tickets to Sydney.

Travelling from Chicago O'Hare International Airport (ORD) to Sydney Airport (SYD): what you need to know

Sydney is 17 hours ahead of Chicago and follows the UTC+11 timezone.
For a smooth journey, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This ensures you have enough time to catch your ORD to SYD flight.
Be prepared for bigger queues in popular months such as July. Arriving up to four hours ahead of international flights and two hours for domestic departures is a wise move.
We make it a breeze to book a flight with a stopover. To see your options for tickets from Chicago O'Hare International Airport to Sydney Airport, uncheck 'Direct flights only.' Then, choose a flight that has a stop long enough to tour the city of your choice. Some great stopovers between ORD and SYD include:
- Dallas Fort Worth International Airport
- Los Angeles International Airport
- Houston George Bush Intercntl. Airport

How to find the cheapest flights from Chicago O'Hare International Airport (ORD) to Sydney Airport (SYD)

Right now, $842 is the lowest price we've seen for a one-way Chicago O'Hare International Airport to Sydney Airport flight. The best price for a return ticket is $1,439. Bear in mind that fares could change due to availability at the time of booking.
It's usually best to book ahead of time if you're hoping to get cheap tickets from ORD to SYD. That's because airlines change prices based on demand, which tends to rise closer to departure.
Finding cheap flights from Chicago O'Hare International Airport to Sydney Airport is easier if you're flexible with your dates. Use the 'Whole month' function to see the lowest prices across the month and snap up a great deal.
You don't need to check back in every day to find out if fares have dropped when you set up a Price Alert. We'll let you know the moment the price changes on cheap flights from ORD to SYD.
Tailor your flights with filters. Choose your ideal departure and arrival times, total journey duration and airlines. You can also sort results by 'Cheapest,' 'Fastest' or 'Best' flights from Chicago O'Hare International Airport to Sydney Airport.

Handy information about Chicago O'Hare International Airport (ORD)

ORD's address is 10000 West O'Hare.
Of the departures from Chicago O'Hare International Airport, 70% land on schedule at their destination.
Chicago O'Hare International Airport is around 27 kilometres from central Chicago. If you're driving, ride-sharing or catching a taxi from the centre, it'll take 30 minutes or so to get there, depending on the traffic.
The trip on public transport typically takes 45 minutes.
Looking for a convenient hotel close to ORD? If you're catching an early flight from Chicago O'Hare International Airport to Sydney Airport, these stays will have you moments from check-in:

Arriving at Sydney Airport (SYD)

If you're coming in on a late Chicago O'Hare International Airport to Sydney Airport flight, nothing beats the convenience of being near the terminal. Pick up your bags from the carousel and then be showered and resting soon after at one of these hotels near SYD:
Travel at your own speed with a Sydney Airport rental car. Book your wheels from simba car rental, Bargain Car Rentals or Yes Drive and see more of Sydney and beyond.
Get the best deal by booking your vehicle from Sydney Airport about two weeks before your trip.

When to fly to Sydney Airport (SYD)

It's time to choose your trip dates for your flight from Chicago O'Hare International Airport to Sydney Airport. July is the busiest month to visit Sydney. If you like a more relaxed vibe, go in March.
Book your flight from Chicago O'Hare International Airport to Sydney Airport for January if you want to explore Sydney during its warmest month. Expect temperatures of between 17ºC (63ºF) and 32ºC (90ºF).
If you want cooler conditions, look for a cheap ticket from ORD to SYD in July. Temperatures average between 5ºC (41ºF) and 19ºC (66ºF) then.

Explore more of Australia

You've visited Sydney, now it's time to discover other corners of Australia. Travel about 241 kilometres south-west to Canberra to check off its popular sights. From National Gallery of Australia to National Portrait Gallery and Museum of Australian Democracy, there's plenty to keep you on the go.
Around 121 kilometres north-east of Sydney, Newcastle is another favourite stop in Australia. Start your sightseeing at Merewether Beach, Nobbys Beach and Newcastle Beach.