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

Return flights

01 Sep - 07 Sep	easyJet
04 Sep - 07 Sep	easyJet
25 Sep - 28 Sep	easyJet
08 Sep - 11 Sep	easyJet
09 Sep - 16 Sep	KLM
07 Sep - 14 Sep	easyJet
10 Sep - 14 Sep	KLM
01 Sep - 01 Sep	easyJet
06 Sep - 13 Sep	KLM

Also check the deals for one-way flights from Southampton to Geneva 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 Southampton to Geneva in September from 115€

Return flights