Cheapest return flights from Bangkok to London in December from $819

Best time to book flights for Bangkok (BKK) to London (LHR) flights at AirHint

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

Return flights

15 Dec - 15 Jan Finnair
10 Dec - 20 Jan Finnair
25 Dec - 08 Jan Finnair
10 Dec - 16 Dec China Eastern
23 Dec - 16 Jan Finnair
25 Dec - 22 Jan Finnair
18 Dec - 15 Jan Finnair
10 Dec - 09 Jan Finnair
26 Dec - 23 Jan Finnair
26 Dec - 09 Jan Finnair
01 Dec - 10 Dec Oman Air
04 Dec - 10 Dec Oman Air
02 Dec - 10 Dec Oman Air
12 Dec - 31 Dec China Southern
12 Dec - 30 Dec China Southern
22 Dec - 03 Jan China Southern
22 Dec - 31 Dec China Southern
12 Dec - 29 Dec China Southern
17 Dec - 23 Dec Finnair
06 Dec - 14 Dec Finnair

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

Skyscanner

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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