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

Return flights

18 Sep - 28 Sep	Fly Play	direct
18 Sep - 20 Sep	Fly Play	direct
18 Sep - 22 Sep	Fly Play	direct
26 Sep - 03 Oct	transavia	direct
26 Sep - 01 Oct	transavia	direct
16 Sep - 17 Sep	Fly Play	direct
16 Sep - 20 Sep	Fly Play	direct
16 Sep - 22 Sep	Fly Play	direct
26 Sep - 29 Sep	transavia	direct
30 Sep - 07 Oct	Ryanair
19 Sep - 24 Sep	transavia	direct
16 Sep - 21 Sep	Fly Play	direct
19 Sep - 25 Sep	transavia	direct
30 Sep - 03 Oct	Ryanair
24 Sep - 05 Oct	Ryanair
27 Sep - 07 Oct	easyJet
27 Sep - 05 Oct	easyJet
26 Sep - 04 Oct	transavia
19 Sep - 01 Oct	transavia	direct
24 Sep - 07 Oct	easyJet

Also check the deals for one-way flights from Amsterdam 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 Amsterdam to Keflavik in September from 200€

Return flights