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

Return flights

24 Dec - 31 Dec	Delta
25 Dec - 21 Jan	Delta
23 Dec - 31 Dec	Delta
22 Dec - 31 Dec	Delta
14 Dec - 21 Dec	Delta
16 Dec - 23 Dec	Delta
15 Dec - 20 Dec	Delta
20 Dec - 01 Jan	Delta
26 Dec - 19 Jan	Air France
22 Dec - 26 Dec	Air France

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

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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Cheapest return flights from Dallas to Sydney in December from $1667

Return flights