Earn point on your loyalty program!arrow arc left

Cheap flights from Chicago (CHI) to Sydney (SYD)

Know your dates, get live prices in seconds
airplane logo

pin logo

calendar
Departure
calendar backward
Return
airplane logo
1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
Book Flight + Hotel at the same time

How to find the cheapest flight from Chicago (CHI) to Sydney (SYD)

How to find the cheapest flight from Chicago (CHI) to Sydney (SYD)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Chicago (CHI) to Sydney (SYD)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Chicago (CHI) to Sydney (SYD)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.

Cheap flights from Chicago to Sydney in August , September 2026

30 Aug - 24 Sep $ 1,463.00
CHI
Chicago
Frontier Airlines
2 STOPS
SYD
Sydney
SYD
Sydney
Frontier Airlines
3 STOPS
CHI
Chicago
Pick dates
25 Aug - 09 Sep $ 1,632.00
CHI
Chicago
Cathay Pacific
1 STOPS
SYD
Sydney
SYD
Sydney
Cathay Pacific
1 STOPS
CHI
Chicago
Pick dates
24 Aug - 06 Sep $ 2,745.00
CHI
Chicago
Air Canada
1 STOPS
SYD
Sydney
SYD
Sydney
Air Canada
1 STOPS
CHI
Chicago
Pick dates

Last minute flights from Chicago to Sydney

17 Aug - 31 Aug $ 1,622.00
CHI
Chicago
All Nippon Airways
1 STOPS
SYD
Sydney
SYD
Sydney
All Nippon Airways
2 STOPS
CHI
Chicago
Pick dates
23 Aug - 31 Aug $ 1,835.00
CHI
Chicago
Air New Zealand
2 STOPS
SYD
Sydney
SYD
Sydney
Air New Zealand
1 STOPS
CHI
Chicago
Pick dates
24 Aug - 31 Aug $ 3,288.00
CHI
Chicago
Air Canada
1 STOPS
SYD
Sydney
SYD
Sydney
Air Canada
1 STOPS
CHI
Chicago
Pick dates

One-way flights to Sydney from Chicago

8:25 PM - 9:05 PM
Etihad Airways
1 Stops
29h 25m
CHI - SYD
$ 697
Kiwi
Pick dates
8:05 PM - 9:05 PM
Etihad Airways
1 Stops
29h 45m
CHI - SYD
$ 697
Kiwi
Pick dates
8:10 PM - 9:00 AM
Turkish Airlines
2 Stops
32h
CHI - SYD
$ 854
Kiwi
Pick dates

How to find the cheapest flight from Chicago (CHI) to Sydney (SYD)

Related info for your journey
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Chicago (CHI) to Sydney (SYD)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Chicago (CHI) to Sydney (SYD)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.