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

Return flights

13 Sep - 26 Sep	IndiGo
25 Sep - 05 Oct	British Airways
20 Sep - 29 Sep	Etihad Airways
19 Sep - 22 Sep	Etihad Airways
05 Sep - 13 Sep	Qatar Airways
04 Sep - 11 Sep	Qatar Airways
08 Sep - 14 Sep	Qatar Airways
20 Sep - 28 Sep	Etihad Airways
15 Sep - 27 Sep	Etihad Airways
03 Sep - 10 Sep	Etihad Airways
06 Sep - 16 Sep	Condor

Also check the deals for one-way flights from Kuala Lumpur 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 Kuala Lumpur to Keflavik in September from $1159

Return flights