AirHint found the following cheapest return flights from London (LTN) to Bangkok (BKK) in December 2025 (see full year).

Return flights

09 Dec - 17 Dec	Wizz Air UK
03 Dec - 10 Dec	Wizz Air UK
10 Dec - 17 Dec	Wizz Air UK
08 Dec - 25 Dec	Wizz Air UK
29 Dec - 15 Jan	Wizz Air UK
11 Dec - 19 Dec	Wizz Air UK
15 Dec - 30 Dec	Wizz Air UK
06 Dec - 01 Jan	Wizz Air UK
14 Dec - 11 Jan	easyJet
27 Dec - 27 Jan	Wizz Air UK
15 Dec - 22 Dec	Wizz Air UK
06 Dec - 02 Jan	Wizz Air UK
04 Dec - 12 Dec	Wizz Air UK
05 Dec - 01 Jan	Wizz Air UK
26 Dec - 16 Jan	Wizz Air UK
31 Dec - 08 Jan	Ryanair
15 Dec - 02 Jan	Wizz Air UK
07 Dec - 01 Jan	easyJet
21 Dec - 28 Dec	Fly One
12 Dec - 26 Dec	easyJet

Also check the deals for one-way flights from London to Bangkok 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 London to Bangkok in December from $699

Return flights