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

Return flights

01 Oct - 08 Oct	ITA Airways
01 Oct - 15 Oct	ITA Airways
05 Oct - 28 Oct	ITA Airways
08 Oct - 15 Oct	ITA Airways
29 Oct - 05 Nov	SWISS
07 Oct - 07 Nov	SWISS
01 Oct - 20 Oct	KLM
01 Oct - 14 Oct	KLM
01 Oct - 09 Oct	KLM
01 Oct - 17 Oct	KLM
01 Oct - 07 Oct	KLM
07 Oct - 14 Oct	SWISS
01 Oct - 03 Nov	KLM
01 Oct - 06 Nov	KLM
01 Oct - 05 Nov	KLM
01 Oct - 04 Nov	KLM
26 Oct - 02 Nov	ITA Airways
01 Oct - 07 Nov	KLM
07 Oct - 06 Nov	KLM
07 Oct - 05 Nov	KLM

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

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 October from $801

Return flights