Cheapest return flights from Warsaw to Keflavik in September from $399

AirHint found the following cheapest return flights from Warsaw (WMI) to Keflavik (KEF) in September 2026 (see full year).

Return flights

02 Sep - 07 Sep Ryanair
01 Sep - 07 Sep Ryanair
06 Sep - 13 Sep Ryanair
01 Sep - 06 Sep Ryanair
17 Sep - 04 Oct Ryanair
08 Sep - 15 Sep Ryanair
04 Sep - 06 Sep Ryanair
17 Sep - 25 Sep Ryanair
17 Sep - 24 Sep Ryanair
03 Sep - 08 Sep Ryanair
13 Sep - 19 Sep Ryanair
27 Sep - 02 Oct Ryanair

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

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