Cheapest return flights from Denver to Sydney in December from $850

AirHint found the following cheapest return flights from Denver (DEN) to Sydney (SYD) in December 2025 (see full year).

Return flights

08 Dec - 17 Dec United
06 Dec - 26 Dec Air New Zealand
28 Dec - 09 Jan Frontier Airlines
11 Dec - 18 Dec United
28 Dec - 10 Jan Air New Zealand
27 Dec - 05 Jan Air New Zealand
16 Dec - 20 Dec Fiji Airways

Also check the deals for one-way flights from Denver to Sydney in December.

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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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