AirHint found the following cheapest return flights from Washington (IAD) to Sydney (SYD) in May 2026 (see full year).
Return flights
| 03 May - 10 May | Alaska Airlines | ||
| 13 May - 26 May | Etihad Airways | ||
| 01 May - 10 May | Etihad Airways | ||
| 09 May - 16 May | Air Canada |
Also check the deals for one-way flights from Washington to Sydney in May.
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