Cheapest return flights from Southampton to Keflavik in September from $452

Best time to book flights for Southampton (SOU) to Keflavik (KEF) flights at AirHint

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

Return flights

06 Sep - 09 Sep easyJet

Also check the deals for one-way flights from Southampton to Keflavik in September.

Skyscanner

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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