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

Return flights

19 Aug - 27 Aug	SWISS	direct
26 Aug - 27 Aug	SWISS	direct
26 Aug - 28 Aug	SWISS	direct
25 Aug - 27 Aug	SWISS	direct
27 Aug - 28 Aug	SWISS	direct
20 Aug - 27 Aug	SWISS	direct
25 Aug - 28 Aug	SWISS	direct
25 Aug - 04 Sep	SWISS	direct
31 Aug - 13 Sep	SWISS	direct
31 Aug - 11 Sep	SWISS	direct
27 Aug - 03 Sep	SWISS	direct
28 Aug - 04 Sep	SWISS	direct
29 Aug - 03 Sep	SWISS	direct
31 Aug - 09 Sep	SWISS	direct
27 Aug - 04 Sep	SWISS	direct
28 Aug - 08 Sep	SWISS	direct
27 Aug - 08 Sep	SWISS	direct
07 Aug - 07 Aug	Lufthansa
12 Aug - 12 Aug	Lufthansa
15 Aug - 15 Aug	Lufthansa

Also check the deals for one-way flights from London to Geneva 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 Geneva in August from 137€

Return flights