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

Return flights

08 Dec - 23 Dec	Lufthansa
07 Dec - 23 Dec	Lufthansa
09 Dec - 16 Dec	Brussels Airlines
10 Dec - 16 Dec	Lufthansa
08 Dec - 16 Dec	Austrian Airlines
07 Dec - 14 Dec	Lufthansa
08 Dec - 14 Dec	Lufthansa
10 Dec - 14 Dec	Lufthansa
08 Dec - 24 Dec	Air France
11 Dec - 18 Dec	Lufthansa
30 Dec - 09 Jan	Lufthansa
12 Dec - 09 Jan	Air Canada
14 Dec - 07 Jan	KLM
10 Dec - 07 Jan	Virgin Atlantic
14 Dec - 08 Jan	Virgin Atlantic
16 Dec - 08 Jan	Virgin Atlantic
13 Dec - 08 Jan	Virgin Atlantic
24 Dec - 11 Jan	British Airways
27 Dec - 09 Jan	Austrian Airlines
24 Dec - 08 Jan	Air Canada

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 470€

Return flights