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

Return flights

31 Aug - 10 Sep	Ryanair
27 Aug - 10 Sep	Pegasus Airlines
31 Aug - 11 Sep	Pegasus Airlines
30 Aug - 26 Sep	Ryanair
25 Aug - 17 Sep	Ryanair
31 Aug - 16 Sep	Pegasus Airlines
20 Aug - 22 Sep	Ryanair
29 Aug - 15 Sep	Ryanair
20 Aug - 15 Sep	Ryanair
31 Aug - 07 Sep	Pegasus Airlines
20 Aug - 27 Aug	Ryanair
25 Aug - 31 Aug	Ryanair
29 Aug - 31 Aug	Ryanair
20 Aug - 31 Aug	Ryanair
24 Aug - 27 Aug	Ryanair
20 Aug - 25 Aug	Ryanair
19 Aug - 31 Aug	Ryanair
19 Aug - 26 Aug	Ryanair
21 Aug - 31 Aug	Ryanair
03 Aug - 06 Aug	Pegasus Airlines

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 621€

Return flights