AirHint found the following cheapest return flights from London (LCY) to Ho Chi Minh City (SGN) in September 2025 (see full year).

Return flights

10 Sep - 24 Sep	KLM
09 Sep - 23 Sep	British Airways
11 Sep - 23 Sep	British Airways
08 Sep - 23 Sep	British Airways
16 Sep - 24 Sep	KLM
16 Sep - 23 Sep	British Airways
02 Sep - 16 Sep	British Airways
03 Sep - 17 Sep	British Airways
11 Sep - 16 Sep	British Airways
10 Sep - 22 Sep	British Airways
17 Sep - 15 Oct	KLM
01 Sep - 01 Oct	KLM
17 Sep - 12 Oct	KLM
27 Sep - 05 Oct	KLM
26 Sep - 05 Oct	SWISS
26 Sep - 21 Oct	Condor
16 Sep - 02 Oct	KLM
18 Sep - 02 Oct	KLM

Also check the deals for one-way flights from London to Ho Chi Minh City 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 Ho Chi Minh City in September from $1025

Return flights