Cheapest return flights from Chicago to Sydney in December from 2025€

Best time to book flights for Chicago (MDW) to Sydney (SYD) flights at AirHint

AirHint found the following cheapest return flights from Chicago (MDW) to Sydney (SYD) in December 2024 (see full year).

Return flights

30 Dec - 16 Jan Frontier Airlines
25 Dec - 11 Jan Frontier Airlines
25 Dec - 01 Jan Frontier Airlines
30 Dec - 01 Jan Frontier Airlines
20 Dec - 04 Jan Porter Airlines (Canada) Ltd
27 Dec - 04 Jan Frontier Airlines
23 Dec - 03 Jan Frontier Airlines

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

Skyscanner

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