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

Return flights

09 Sep - 23 Sep	Air China
08 Sep - 24 Sep	Air China
09 Sep - 16 Sep	Air China
08 Sep - 14 Sep	Air China
07 Sep - 14 Sep	Air China
08 Sep - 15 Sep	Air China
05 Sep - 12 Sep	China Eastern
16 Sep - 23 Sep	Air China
10 Sep - 17 Sep	China Eastern
01 Sep - 08 Sep	VietJet Air
24 Sep - 01 Oct	VietJet Air
25 Sep - 02 Oct	Thai AirAsia
03 Sep - 06 Oct	China Eastern
28 Sep - 05 Oct	VietJet Air
30 Sep - 07 Oct	VietJet Air
27 Sep - 04 Oct	China Eastern
26 Sep - 03 Oct	Emirates
21 Sep - 01 Oct	Emirates
22 Sep - 01 Oct	Emirates
23 Sep - 01 Oct	Emirates

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

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 Hanoi to London in September from $660

Return flights