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

Return flights

24 Sep - 30 Sep	easyJet
22 Sep - 25 Sep	easyJet
22 Sep - 23 Sep	easyJet
15 Sep - 18 Sep	easyJet
27 Sep - 04 Oct	easyJet
25 Sep - 02 Oct	easyJet
13 Sep - 20 Sep	easyJet
25 Sep - 26 Sep	easyJet
22 Sep - 26 Sep	easyJet
13 Sep - 15 Sep	easyJet
27 Sep - 28 Sep	easyJet
08 Sep - 09 Sep	easyJet

Also check the deals for one-way flights from Geneva 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 Geneva to London in September from $139

Return flights