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

Return flights

01 Dec - 25 Dec	Lufthansa	direct
03 Dec - 10 Dec	Lufthansa
01 Dec - 08 Dec	Virgin Atlantic
07 Dec - 16 Dec	Air France
02 Dec - 10 Dec	KLM
03 Dec - 24 Dec	Finnair
08 Dec - 16 Dec	Air France
12 Dec - 25 Dec	Lufthansa	direct
03 Dec - 07 Dec	Air France
01 Dec - 30 Dec	Air Canada
29 Dec - 21 Jan	Delta
15 Dec - 08 Jan	Lufthansa
11 Dec - 11 Jan	British Airways	direct
16 Dec - 06 Jan	Virgin Atlantic
15 Dec - 10 Jan	United	direct
29 Dec - 21 Jan	Lufthansa	direct
15 Dec - 08 Jan	British Airways	direct
23 Dec - 08 Jan	KLM
23 Dec - 07 Jan	KLM
22 Dec - 08 Jan	Lufthansa	direct

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 400€

Return flights