The cheapest times to fly from ORD to SYD are

  • January 22nd to March 18th
  • April 9th to May 13th
  • August 6th to October 7th
  • October 22nd to November 18th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from ORD to SYD is late January and early February. Prices can be as high as $2353 for Saturday flights during late December, or as low as $1087 for Tuesday flights around late January and early February.


When to Fly to Sydney

Flying from Chicago, IL (ORD) to Sydney (SYD) will usually cost between $1107 to $1776 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late January and early February with an average ticket price of $1113. Due to high demand the most expensive time to fly is late December, with an average price of $2162. Planning your trip to low-cost times can easily save you $1050 on economy flights and even more on first-class flights. Generally, any price below $1232 can be considered a good price for a round-trip ORD to SYD flight.

See below for a graph of average weekly prices for the ORD to SYD route. All prices are for round-trip tickets in USD.

ORD to SYD Flight Prices

Compared to other flights, the ORD to SYD flight is slightly more expensive than the average and costs slightly more than the average flight leaving from Chicago. The average price per mile (for a direct flight) is $0.08, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to fly to SYD, and Wednesday the cheapest day to fly back into ORD. Saturdays are the most expensive days to fly to Sydney, and Thursdays are the most expensive days to return to Chicago. Selecting flights on the least expensive days could save you up to $102 (8%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1235. Return trip prices are from the SYD to ORD flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from ORD to SYD can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 17 hour 36 minutes may not be realistic.


Flight Hacking ORD to SYD

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from ORD to SYD — but Champion Traveler does!

Hack #1: Bangkok (ORD > BKK > SYD)

  • Price for both tickets: $1152
  • Average savings: $81 (6.53%)

See ORD to BKK flights

Hack #2: Beijing (ORD > PEK > SYD)

  • Price for both tickets: $1153
  • Average savings: $80 (6.45%)

See ORD to PEK flights

Hack #3: Kuala Lumpur (ORD > KUL > SYD)

  • Price for both tickets: $1153
  • Average savings: $79 (6.41%)

See ORD to KUL flights


Flight Questions Answered

Still have questions about flying from ORD to SYD? We’ve got answers.

Which airlines fly this route?

You can find 26 major airlines flying this route most often: Air Canada, Air China, Air New Zealand, Air Tahiti Nui, Alaska, American, ANA, Asiana, Austrian, British Airways, Cathay Pacific, China Airlines, China Eastern, China Southern, Delta, Emirates, Etihad, Fiji Airways, Hawaiian, JAL, Korean Air, Qantas, Qatar Airways, United, Virgin Australia, Xiamen, and potentially more during busy seasons.

How far away is it from Sydney International Airport to Chicago O’Hare International Airport?

The distance between the two airports is roughly 9233 miles or 14859 kilometers.

How long does it take to fly from ORD to SYD?

The real-world flight time for a nonstop ORD to SYD flight is about 17 hour 36 minutes.

How many flights go between Chicago, IL and Sydney?

It depends on the day of the week and the date, but a typical day might have around 90 available flights from ORD to SYD.


Airport Location Info


Departing Airport

Origination code ORD
Origination airport name Chicago O’Hare International Airport
City Chicago, IL
Country the United States
Latitude 42
Longitude -87.9

Return Airport

Destination code SYD
Destination airport name Sydney International Airport
City Sydney
Country Australia
Latitude -33.9
Longitude 151.2


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.