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

Return flights

09 Sep - 22 Oct	Ryanair
09 Sep - 23 Oct	Ryanair
18 Sep - 22 Oct	Pegasus Airlines
17 Sep - 20 Oct	Ryanair
25 Sep - 23 Oct	Pegasus Airlines
09 Sep - 20 Oct	Ryanair
09 Sep - 15 Oct	Ryanair
26 Sep - 22 Oct	AJet
27 Sep - 30 Oct	Pegasus Airlines
27 Sep - 23 Oct	Pegasus Airlines
17 Sep - 24 Sep	Ryanair
09 Sep - 22 Sep	Ryanair
09 Sep - 15 Sep	Ryanair
16 Sep - 23 Sep	Ryanair
09 Sep - 19 Sep	Ryanair
09 Sep - 17 Sep	Ryanair
07 Sep - 18 Sep	Pegasus Airlines
10 Sep - 26 Sep	Ryanair
18 Sep - 21 Sep	Pegasus Airlines
14 Sep - 21 Sep	AJet

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 $577

Return flights