Cheapest return flights from Ontario to Sydney in May from $1052

AirHint found the following cheapest return flights from Ontario (ONT) to Sydney (SYD) in May 2026 (see full year).

Return flights

15 May - 05 Jun Alaska Airlines
31 May - 06 Jun Alaska Airlines
31 May - 07 Jun Alaska Airlines
17 May - 26 May Alaska Airlines
02 May - 24 May Alaska Airlines
03 May - 16 May Alaska Airlines
20 May - 27 May China Airlines
06 May - 21 May China Airlines
18 May - 22 May China Airlines
01 May - 15 May China Airlines
01 May - 03 May China Airlines
22 May - 28 May China Airlines
19 May - 26 May Qatar Airways

Also check the deals for one-way flights from Ontario to Sydney in May.

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