Cheapest return flights from Chicago to Sydney in December from 1089€

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

Return flights

01 Dec - 15 Dec Korean Air
25 Dec - 13 Jan Turkish Airlines
16 Dec - 20 Jan IndiGo
23 Dec - 12 Jan United
27 Dec - 08 Jan Qantas
27 Dec - 06 Jan Turkish Airlines
18 Dec - 25 Dec Qantas
12 Dec - 11 Jan Qantas
15 Dec - 03 Jan Turkish Airlines
16 Dec - 06 Jan American Airlines
19 Dec - 12 Jan Qantas
19 Dec - 06 Jan Qantas

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.

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