Cheapest return flights from London to Hanoi in September from $542

Best time to book flights for London (LHR) to Hanoi (HAN) flights at AirHint

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

Return flights

19 Sep - 14 Oct China Southern
15 Sep - 15 Oct China Southern
16 Sep - 15 Oct China Southern
16 Sep - 16 Oct China Southern
15 Sep - 14 Oct China Southern
20 Sep - 10 Oct China Southern
21 Sep - 09 Oct China Southern
21 Sep - 05 Oct China Southern
24 Sep - 05 Oct China Southern
24 Sep - 06 Oct China Southern
02 Sep - 15 Sep Cathay Pacific
08 Sep - 17 Sep Singapore Airlines
10 Sep - 15 Sep Singapore Airlines
08 Sep - 22 Sep Singapore Airlines
08 Sep - 23 Sep Singapore Airlines
08 Sep - 24 Sep Singapore Airlines
08 Sep - 15 Sep Singapore Airlines
02 Sep - 23 Sep Singapore Airlines
01 Sep - 16 Sep Singapore Airlines
03 Sep - 15 Sep Singapore Airlines

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

Skyscanner

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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