Cheapest one-way flights from Houston to Sydney in December from $759

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

One-Way flights

26 Dec Frontier Airlines
16 Dec Air Canada
18 Dec Air Canada
16 Dec United direct
21 Dec United direct
18 Dec United direct
19 Dec United direct
20 Dec United direct

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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