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

Return flights

03 Sep - 10 Sep	Fly Play	direct
06 Sep - 13 Sep	Fly Play	direct
27 Sep - 01 Oct	Fly Play	direct
17 Sep - 27 Sep	Fly Play	direct
13 Sep - 20 Sep	Fly Play	direct
17 Sep - 24 Sep	Fly Play	direct
20 Sep - 24 Sep	Fly Play	direct
10 Sep - 20 Sep	Fly Play	direct
24 Sep - 28 Sep	Ryanair
23 Sep - 27 Sep	Ryanair
02 Sep - 06 Sep	Ryanair
27 Sep - 02 Oct	Ryanair

Also check the deals for one-way flights from Faro to Keflavik 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 Faro to Keflavik in September from 191€

Return flights