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

Return flights

06 Sep - 06 Oct	easyJet
02 Sep - 09 Sep	Wizz Air Malta
15 Sep - 21 Sep	easyJet
05 Sep - 09 Sep	Wizz Air Malta
13 Sep - 21 Oct	Lufthansa
27 Sep - 02 Oct	Wizz Air	direct
16 Sep - 20 Sep	Wizz Air
13 Sep - 18 Sep	Lufthansa
01 Sep - 06 Sep	Wizz Air
14 Sep - 24 Sep	Ryanair
06 Sep - 16 Sep	Wizz Air
04 Sep - 11 Sep	Wizz Air
22 Sep - 28 Sep	easyJet
27 Sep - 14 Oct	Wizz Air	direct
27 Sep - 07 Oct	Ryanair
27 Sep - 16 Oct	Wizz Air	direct
27 Sep - 09 Oct	Wizz Air	direct
25 Sep - 02 Oct	Wizz Air	direct
18 Sep - 02 Oct	Wizz Air	direct
06 Sep - 07 Oct	Wizz Air

Also check the deals for one-way flights from Budapest 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 Budapest to Keflavik in September from 175€

Return flights