AirHint found the following cheapest return flights from Keflavik (KEF) to Basel (BSL) in August 2025 (see full year).

Return flights

27 Aug - 30 Aug	easyJet	direct
20 Aug - 27 Aug	easyJet
26 Aug - 31 Aug	Fly Play
03 Aug - 05 Aug	easyJet	direct
16 Aug - 20 Aug	Wizz Air
01 Aug - 04 Aug	Lufthansa
02 Aug - 04 Aug	Fly Play
01 Aug - 03 Aug	Wizz Air Malta

Also check the deals for one-way flights from Keflavik to Basel 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 Keflavik to Basel in August from 189€

Return flights