AirHint found the following cheapest return flights from Washington (DCA) to Sydney (SYD) in May 2026 (see full year).
Return flights
| 25 May - 05 Jun | Frontier Airlines | ||
| 22 May - 07 Jun | Alaska Airlines | ||
| 16 May - 05 Jun | Qantas | ||
| 10 May - 17 May | Air Canada | ||
| 14 May - 24 May | British Airways |
Also check the deals for one-way flights from Washington to Sydney in May.
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