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

Return flights

04 Dec - 14 Dec	Wizz Air UK
09 Dec - 14 Dec	Wizz Air UK
08 Dec - 14 Dec	Wizz Air UK
05 Dec - 14 Dec	Ryanair
30 Dec - 28 Jan	Wizz Air UK
31 Dec - 12 Jan	Wizz Air UK
26 Dec - 16 Jan	Wizz Air UK
18 Dec - 11 Jan	easyJet
04 Dec - 15 Dec	easyJet
01 Dec - 14 Dec	easyJet
04 Dec - 22 Dec	easyJet
04 Dec - 11 Dec	easyJet
11 Dec - 15 Dec	easyJet
22 Dec - 12 Jan	easyJet
22 Dec - 28 Dec	easyJet
22 Dec - 02 Jan	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.

Book a cheap hotel in Bangkok

Cheap car rent in Bangkok

Cheapest return flights from London to Bangkok in December from $669

Return flights