AirHint found the following cheapest return flights from London (LTN) to Hanoi (HAN) in September 2025 (see full year).

Return flights

16 Sep - 11 Oct	Wizz Air UK
16 Sep - 28 Sep	Wizz Air UK
22 Sep - 30 Sep	Ryanair
22 Sep - 01 Oct	Ryanair
22 Sep - 06 Oct	Wizz Air UK
04 Sep - 25 Sep	Wizz Air
01 Sep - 22 Sep	Ryanair
15 Sep - 13 Oct	Wizz Air UK
04 Sep - 22 Sep	Wizz Air
22 Sep - 20 Oct	Ryanair
02 Sep - 17 Sep	Wizz Air UK
23 Sep - 28 Sep	Wizz Air UK
10 Sep - 22 Sep	Wizz Air
25 Sep - 16 Oct	Wizz Air
09 Sep - 30 Sep	Ryanair
09 Sep - 23 Sep	Ryanair
15 Sep - 01 Oct	Ryanair
23 Sep - 23 Oct	Wizz Air UK
22 Sep - 05 Oct	Ryanair
26 Sep - 03 Oct	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 592€

Return flights