AirHint found the following cheapest return flights from Chicago (ORD) to Sydney (SYD) in February 2026 (see full year).

Return flights

17 Feb - 09 Mar	Frontier Airlines
09 Feb - 24 Feb	Qantas
14 Feb - 25 Feb	Qantas
24 Feb - 03 Mar	Qantas
18 Feb - 25 Feb	Frontier Airlines
28 Feb - 08 Mar	Spirit Airlines
18 Feb - 05 Mar	Frontier Airlines
20 Feb - 01 Mar	Frontier Airlines
17 Feb - 27 Feb	Cathay Pacific
27 Feb - 03 Mar	Frontier Airlines
12 Feb - 01 Mar	Qantas
16 Feb - 19 Feb	Spirit Airlines
12 Feb - 19 Feb	Qantas
13 Feb - 20 Feb	Spirit Airlines
10 Feb - 13 Feb	Spirit Airlines
26 Feb - 15 Mar	Qantas
27 Feb - 15 Mar	Qantas
28 Feb - 15 Mar	Qantas
12 Feb - 23 Feb	United
21 Feb - 23 Feb	Spirit Airlines

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

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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Cheapest return flights from Chicago to Sydney in February from 817€

Return flights