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

Return flights

05 Oct - 13 Oct	Air China
05 Oct - 12 Oct	Air China
05 Oct - 14 Oct	Air China
05 Oct - 15 Oct	Air China
05 Oct - 19 Oct	Air China
05 Oct - 11 Oct	Air China
01 Oct - 13 Oct	Shenzhen Airlines
01 Oct - 09 Oct	Shenzhen Airlines
05 Oct - 23 Oct	Air China
05 Oct - 20 Oct	Air China
21 Oct - 26 Nov	Air China
04 Oct - 05 Nov	Air China
05 Oct - 09 Nov	Air China
28 Oct - 10 Nov	Air China
21 Oct - 09 Nov	Air China
21 Oct - 10 Nov	Air China
27 Oct - 06 Nov	Shenzhen Airlines
29 Oct - 14 Nov	Shenzhen Airlines
31 Oct - 07 Nov	Shenzhen Airlines
31 Oct - 09 Nov	Shenzhen Airlines

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 $492

Return flights