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

Return flights

29 Aug - 19 Sep	Ryanair
29 Aug - 15 Sep	Ryanair
20 Aug - 22 Sep	Emirates
19 Aug - 22 Sep	Emirates
24 Aug - 24 Sep	Emirates
25 Aug - 29 Sep	Emirates
30 Aug - 30 Sep	Emirates
23 Aug - 23 Sep	Emirates
19 Aug - 21 Sep	Emirates
20 Aug - 20 Sep	Emirates
18 Aug - 27 Aug	Ryanair
20 Aug - 24 Aug	Ryanair
18 Aug - 28 Aug	Ryanair
22 Aug - 27 Aug	Ryanair
24 Aug - 27 Aug	Ryanair
21 Aug - 25 Aug	Ryanair
18 Aug - 29 Aug	Ryanair
21 Aug - 24 Aug	Ryanair
07 Aug - 21 Aug	Ryanair
11 Aug - 18 Aug	Ryanair

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

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 August from $767

Return flights