AirHint found the following cheapest return flights from Denver (DEN) to Sydney (SYD) in April 2026 (see full year).
Return flights
| 03 Apr - 24 Apr | Frontier Airlines | ||
| 22 Apr - 29 Apr | Air Canada | ||
| 05 Apr - 18 Apr | Qantas |
Also check the deals for one-way flights from Denver to Sydney in April.
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