Cheapest return flights from Chicago to Sydney in December from $1181

AirHint found the following cheapest return flights from Chicago (MDW) to Sydney (SYD) in December 2025 (see full year).

Return flights

04 Dec - 11 Dec Frontier Airlines
15 Dec - 03 Jan Frontier Airlines
10 Dec - 17 Dec Frontier Airlines
20 Dec - 10 Jan Porter Airlines (Canada) Ltd
31 Dec - 21 Jan Air France
26 Dec - 12 Jan Air France

Also check the deals for one-way flights from Chicago to Sydney in December.

Powered by

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Sydney

Cheap car rent in Sydney

Feel free to contact us with any feedback or request another flight research.