AirHint found the following cheapest return flights from London (LCY) to Taipei (TPE) in September 2025 (see full year).

Return flights

25 Sep - 05 Oct	Lufthansa
22 Sep - 29 Sep	ITA Airways
24 Sep - 08 Oct	SWISS
25 Sep - 09 Oct	SWISS
14 Sep - 23 Sep	KLM
11 Sep - 23 Sep	KLM
13 Sep - 19 Sep	KLM
09 Sep - 19 Sep	KLM
08 Sep - 19 Sep	KLM
12 Sep - 19 Sep	KLM
02 Sep - 18 Sep	KLM
01 Sep - 02 Oct	British Airways
16 Sep - 30 Sep	KLM
03 Sep - 16 Sep	KLM
21 Sep - 05 Oct	KLM
26 Sep - 28 Oct	KLM
30 Sep - 07 Oct	KLM
23 Sep - 14 Oct	KLM
30 Sep - 21 Oct	KLM
28 Sep - 05 Oct	KLM

Also check the deals for one-way flights from London to Taipei in September.

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 Taipei in September from $935

Return flights