Cheapest return flights from London to Bangkok in December from $530

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

Return flights

05 Dec - 13 Dec Hainan Airlines
01 Dec - 11 Dec Hainan Airlines
05 Dec - 11 Dec Hainan Airlines
01 Dec - 21 Dec Hainan Airlines
08 Dec - 16 Jan Hainan Airlines
03 Dec - 20 Dec Shenzhen Airlines
03 Dec - 11 Dec Shenzhen Airlines
03 Dec - 10 Dec Shenzhen Airlines
05 Dec - 23 Dec Shenzhen Airlines
01 Dec - 05 Dec Hainan Airlines
08 Dec - 12 Dec Hainan Airlines
08 Dec - 29 Jan Hainan Airlines
01 Dec - 26 Jan Hainan Airlines
01 Dec - 29 Jan Hainan Airlines
01 Dec - 30 Jan Hainan Airlines
08 Dec - 26 Jan Hainan Airlines
08 Dec - 09 Jan Hainan Airlines
01 Dec - 11 Jan Hainan Airlines
05 Dec - 15 Jan Hainan Airlines
01 Dec - 15 Jan Hainan Airlines

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

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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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