AirHint found the following cheapest return flights from Phuket (HKT) to London (LGW) in September 2025 (see full year).

Return flights

10 Sep - 11 Sep	AirAsia
12 Sep - 27 Sep	Thai VietJet Air
11 Sep - 21 Sep	Air Arabia
15 Sep - 30 Sep	Thai VietJet Air
27 Sep - 31 Oct	AirAsia
04 Sep - 20 Sep	Thai VietJet Air
06 Sep - 20 Sep	Thai VietJet Air
06 Sep - 22 Sep	Thai VietJet Air
06 Sep - 18 Sep	Thai VietJet Air
08 Sep - 15 Sep	Scoot Tigerair
08 Sep - 22 Sep	China Eastern
18 Sep - 04 Oct	Malaysia Airlines

Also check the deals for one-way flights from Phuket 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 Phuket to London in September from 582€

Return flights