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

Return flights

29 Sep - 04 Oct	easyJet	direct
01 Sep - 08 Sep	easyJet	direct
10 Sep - 15 Sep	easyJet	direct
03 Sep - 08 Sep	easyJet	direct
10 Sep - 13 Sep	easyJet	direct
06 Sep - 08 Sep	easyJet	direct
10 Sep - 17 Sep	easyJet	direct
10 Sep - 23 Sep	easyJet
08 Sep - 24 Sep	easyJet
08 Sep - 24 Sep	easyJet	direct
06 Sep - 17 Sep	easyJet	direct
23 Sep - 03 Oct	easyJet
23 Sep - 03 Oct	Icelandair	direct

Also check the deals for one-way flights from Edinburgh 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 Edinburgh to Keflavik in September from $99

Return flights