Cheapest one-way flights from Houston to Sydney in December from $619

AirHint found the following cheapest one-way flights from Houston (HOU) to Sydney (SYD) in December 2025 (see full year).

One-Way flights

25 Dec Spirit Airlines
27 Dec Spirit Airlines
24 Dec Frontier Airlines
28 Dec Turkish Airlines
28 Dec United direct
24 Dec United direct
26 Dec Spirit Airlines
25 Dec United direct
27 Dec United direct
19 Dec Frontier Airlines

Also check the deals for return flights from Houston 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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