AirHint found the following cheapest return flights from Bangkok (BKK) to London (LHR) in December 2026 (see full year).

Return flights

01 Dec - 09 Dec	Kuwait Airways
20 Dec - 03 Jan	Kuwait Airways
08 Dec - 05 Jan	Norse Atlantic Airways
04 Dec - 13 Dec	Kuwait Airways
15 Dec - 16 Dec	Kuwait Airways
24 Dec - 01 Jan	China Eastern
05 Dec - 31 Dec	China Eastern
15 Dec - 22 Dec	China Eastern
11 Dec - 29 Dec	China Eastern
29 Dec - 05 Jan	SriLankan Airlines
10 Dec - 28 Dec	Saudia
24 Dec - 28 Dec	Saudia
19 Dec - 23 Dec	Saudia
01 Dec - 01 Dec	Saudia
17 Dec - 01 Jan	Saudia
17 Dec - 04 Jan	Saudia
17 Dec - 05 Jan	Saudia
17 Dec - 06 Jan	Saudia
29 Dec - 04 Jan	Saudia
24 Dec - 03 Jan	Saudia

Also check the deals for one-way flights from Bangkok 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 Bangkok to London in December from 645€

Return flights