Cheapest return flights from Houston to Sydney in December from 931€

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

Return flights

03 Dec - 10 Dec Frontier Airlines
04 Dec - 11 Dec Spirit Airlines
29 Dec - 11 Jan Frontier Airlines
28 Dec - 11 Jan Spirit Airlines
22 Dec - 29 Dec Frontier Airlines
25 Dec - 09 Jan United direct
03 Dec - 10 Dec United direct
04 Dec - 11 Dec United direct
19 Dec - 22 Dec Frontier Airlines
24 Dec - 04 Jan Frontier Airlines
22 Dec - 29 Dec United direct
19 Dec - 22 Dec United direct
24 Dec - 04 Jan United direct
18 Dec - 08 Jan United

Also check the deals for one-way 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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