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

Return flights

04 Dec - 13 Dec	Spirit Airlines
05 Dec - 13 Dec	Frontier Airlines
06 Dec - 13 Dec	Spirit Airlines
09 Dec - 05 Jan	Spirit Airlines
10 Dec - 05 Jan	Spirit Airlines
11 Dec - 05 Jan	Frontier Airlines
24 Dec - 06 Jan	Frontier Airlines
13 Dec - 05 Jan	Spirit Airlines
12 Dec - 05 Jan	Frontier Airlines
18 Dec - 10 Jan	WestJet
14 Dec - 05 Jan	Frontier Airlines
22 Dec - 05 Jan	Spirit Airlines
13 Dec - 03 Jan	Spirit Airlines
22 Dec - 26 Dec	Spirit Airlines
19 Dec - 28 Dec	Frontier Airlines

Also check the deals for one-way flights from Houston to Vienna 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 Houston to Vienna in December from 600€

Return flights