AirHint found the following cheapest return flights from Houston (HOU) to Frankfurt (FRA) in December 2025 (see full year).

Return flights

14 Dec - 13 Jan	Frontier Airlines
07 Dec - 17 Dec	Spirit Airlines
09 Dec - 15 Dec	Frontier Airlines
16 Dec - 07 Jan	Spirit Airlines
01 Dec - 16 Dec	KLM
17 Dec - 07 Jan	Spirit Airlines
14 Dec - 27 Dec	Frontier Airlines
14 Dec - 20 Dec	Frontier Airlines
22 Dec - 05 Jan	Spirit Airlines
15 Dec - 31 Dec	Spirit Airlines
10 Dec - 22 Dec	Frontier Airlines
06 Dec - 20 Dec	Frontier Airlines
05 Dec - 20 Dec	Spirit Airlines
23 Dec - 28 Dec	Frontier Airlines
22 Dec - 03 Jan	Spirit Airlines
26 Dec - 07 Jan	United
16 Dec - 07 Jan	Lufthansa	direct
10 Dec - 14 Jan	United
17 Dec - 07 Jan	Lufthansa	direct
04 Dec - 02 Jan	Lufthansa

Also check the deals for one-way flights from Houston to Frankfurt 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 Frankfurt in December from 646€

Return flights