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

Return flights

17 Sep - 23 Sep	Ryanair
17 Sep - 24 Sep	Ryanair
15 Sep - 23 Sep	Ryanair
28 Sep - 22 Oct	Pegasus Airlines
01 Sep - 10 Sep	Ryanair
03 Sep - 15 Sep	Ryanair
07 Sep - 27 Oct	Ryanair
17 Sep - 22 Oct	Ryanair
15 Sep - 15 Oct	Ryanair
07 Sep - 15 Sep	Ryanair
10 Sep - 30 Oct	Ryanair
15 Sep - 24 Sep	Ryanair
28 Sep - 15 Oct	Jet2
14 Sep - 22 Sep	Ryanair
03 Sep - 22 Sep	Ryanair
10 Sep - 18 Sep	Ryanair
17 Sep - 14 Oct	Ryanair
28 Sep - 26 Oct	Jet2
28 Sep - 06 Oct	Pegasus Airlines
24 Sep - 11 Oct	Ryanair

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

Book a cheap hotel in Hanoi

Cheap car rent in Hanoi

Cheapest return flights from London to Hanoi in September from 535€

Return flights