Cheapest return flights from Miami to Keflavik in September from $518

Best time to book flights for Miami (MIA) to Keflavik (KEF) flights at AirHint

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

Return flights

09 Sep - 16 Sep Spirit Airlines
16 Sep - 27 Sep Spirit Airlines
01 Sep - 08 Sep Spirit Airlines
08 Sep - 15 Sep Spirit Airlines
14 Sep - 21 Sep Spirit Airlines
05 Sep - 12 Sep Spirit Airlines
15 Sep - 22 Sep Spirit Airlines
04 Sep - 11 Sep KLM
13 Sep - 23 Sep Air France
06 Sep - 13 Sep KLM

Also check the deals for one-way flights from Miami 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.

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