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

Return flights

29 Dec - 29 Jan	British Airways	direct
29 Dec - 07 Jan	Lufthansa
29 Dec - 07 Jan	United	direct
24 Dec - 07 Jan	Frontier Airlines
25 Dec - 30 Dec	jetBlue
23 Dec - 28 Dec	jetBlue
28 Dec - 06 Jan	Air Canada
28 Dec - 05 Jan	Austrian Airlines
22 Dec - 07 Jan	Spirit Airlines
23 Dec - 06 Jan	Spirit Airlines
23 Dec - 09 Jan	United	direct
25 Dec - 01 Jan	jetBlue
25 Dec - 31 Dec	Spirit Airlines
24 Dec - 31 Dec	Spirit Airlines
22 Dec - 26 Dec	jetBlue
26 Dec - 29 Dec	Spirit Airlines
21 Dec - 27 Dec	jetBlue
21 Dec - 22 Dec	Spirit Airlines
21 Dec - 29 Dec	jetBlue
26 Dec - 29 Dec	Austrian Airlines	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 595€

Return flights