AirHint found the following cheapest return flights from London (LON) to Hanoi (HAN) in September 2026 (see full year).

Return flights

29 Sep - 27 Oct	Wizz Air UK
16 Sep - 29 Sep	Wizz Air UK
14 Sep - 12 Oct	Air China
21 Sep - 12 Oct	Air China
21 Sep - 14 Oct	Air China
30 Sep - 28 Oct	Wizz Air UK
23 Sep - 12 Oct	Air China
10 Sep - 22 Sep	Wizz Air UK
23 Sep - 14 Oct	Air China
10 Sep - 24 Sep	Wizz Air UK
28 Sep - 18 Oct	Wizz Air UK
09 Sep - 13 Oct	Wizz Air UK
09 Sep - 29 Sep	Wizz Air UK
09 Sep - 21 Sep	Wizz Air UK
02 Sep - 17 Sep	Wizz Air UK
16 Sep - 07 Oct	Wizz Air UK
13 Sep - 27 Sep	Wizz Air UK
17 Sep - 24 Sep	Pegasus Airlines
10 Sep - 20 Sep	Wizz Air UK
12 Sep - 27 Sep	Wizz Air UK

Also check the deals for one-way flights from London to Hanoi 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 Hanoi in September from $611

Return flights