Cheapest return flights from Frankfurt to Keflavik in September from 214€

Best time to book flights for Frankfurt (FRA) to Keflavik (KEF) flights at AirHint

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

Return flights

10 Sep - 15 Sep Ryanair
18 Sep - 25 Sep Ryanair
05 Sep - 10 Sep Ryanair
07 Sep - 17 Sep Ryanair
02 Sep - 07 Sep Ryanair
14 Sep - 24 Sep Ryanair
12 Sep - 21 Sep Ryanair
22 Sep - 02 Oct Ryanair
07 Sep - 15 Sep Ryanair
19 Sep - 29 Sep Ryanair
09 Sep - 15 Sep Ryanair
28 Sep - 08 Oct Ryanair
27 Sep - 03 Oct LOT
20 Sep - 05 Oct LOT
28 Sep - 05 Oct LOT
25 Sep - 06 Oct LOT
27 Sep - 12 Oct LOT
23 Sep - 03 Oct LOT
30 Sep - 10 Oct LOT
21 Sep - 01 Oct LOT

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

Skyscanner

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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik