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

Return flights

29 Dec - 09 Jan	SWISS
27 Dec - 10 Jan	Frontier Airlines
30 Dec - 08 Jan	Turkish Airlines
29 Dec - 06 Jan	Spirit Airlines
24 Dec - 04 Jan	Air Canada
25 Dec - 04 Jan	Air Canada
24 Dec - 01 Jan	KLM
27 Dec - 07 Jan	Frontier Airlines
22 Dec - 25 Dec	Air Canada
22 Dec - 29 Dec	KLM
22 Dec - 27 Dec	Air Canada
23 Dec - 08 Jan	Viva
26 Dec - 01 Jan	Frontier Airlines
23 Dec - 27 Dec	Lufthansa
22 Dec - 31 Dec	Frontier Airlines
23 Dec - 29 Dec	KLM

Also check the deals for one-way flights from Houston to London 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 London in December from 642€

Return flights