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

Return flights

29 Oct - 14 Nov	Ryanair
03 Oct - 17 Oct	Ryanair
04 Oct - 17 Oct	Ryanair
19 Oct - 10 Nov	Ryanair
31 Oct - 10 Nov	Ryanair
31 Oct - 14 Nov	Ryanair
26 Oct - 08 Nov	Ryanair
27 Oct - 10 Nov	Ryanair
03 Oct - 14 Oct	Ryanair
01 Oct - 29 Oct	Ryanair
19 Oct - 03 Nov	Ryanair
03 Oct - 15 Oct	Ryanair
20 Oct - 17 Nov	Ryanair
19 Oct - 29 Oct	Ryanair
20 Oct - 10 Nov	Ryanair
20 Oct - 31 Oct	Ryanair
01 Oct - 22 Oct	Ryanair
17 Oct - 22 Oct	Ryanair
26 Oct - 10 Nov	Ryanair
07 Oct - 20 Oct	Ryanair

Also check the deals for one-way flights from London to Hanoi in October.

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 October from 555€

Return flights