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

Return flights

31 Aug - 09 Sep	Air China
31 Aug - 08 Sep	Air China
31 Aug - 07 Sep	Air China
27 Aug - 03 Sep	China Eastern
28 Aug - 04 Sep	China Eastern
28 Aug - 09 Sep	China Eastern
27 Aug - 11 Sep	China Eastern
27 Aug - 02 Sep	China Eastern
28 Aug - 05 Sep	China Eastern
28 Aug - 11 Sep	China Eastern
24 Aug - 31 Aug	Aegean Airlines
24 Aug - 27 Aug	Aegean Airlines
25 Aug - 31 Aug	Air China
25 Aug - 27 Aug	Aegean Airlines
25 Aug - 28 Aug	Air China
29 Aug - 31 Aug	Aegean Airlines
28 Aug - 31 Aug	Aegean Airlines
24 Aug - 29 Aug	Aegean Airlines
24 Aug - 30 Aug	Aegean Airlines
26 Aug - 29 Aug	Turkish 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 $524

Return flights