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

Return flights

11 Sep - 20 Sep	HK Express
30 Sep - 06 Oct	AirAsia X
07 Sep - 13 Sep	HK Express
02 Sep - 07 Sep	HK Express
27 Sep - 04 Oct	Thai VietJet Air
16 Sep - 25 Sep	HK Express
08 Sep - 12 Sep	Etihad Airways
08 Sep - 13 Sep	Etihad Airways
23 Sep - 26 Sep	Royal Brunei
26 Sep - 04 Oct	Thai VietJet Air
16 Sep - 30 Sep	Etihad Airways
24 Sep - 15 Oct	AirAsia X
20 Sep - 29 Sep	Etihad Airways
12 Sep - 24 Oct	Thai VietJet Air
22 Sep - 13 Oct	Thai VietJet Air
06 Sep - 12 Sep	Asiana Airlines
26 Sep - 01 Oct	AirAsia X
24 Sep - 04 Oct	AirAsia X
29 Sep - 04 Oct	AirAsia X
29 Sep - 07 Oct	Etihad Airways

Also check the deals for one-way flights from Taipei to London 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 Taipei to London in September from 668€

Return flights