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

Return flights

30 Aug - 06 Sep	Virgin Atlantic
31 Aug - 07 Sep	Air France
27 Aug - 03 Sep	Spirit Airlines
29 Aug - 05 Sep	KLM
26 Aug - 02 Sep	Spirit Airlines
28 Aug - 04 Sep	Air Canada
25 Aug - 01 Sep	Spirit Airlines
09 Aug - 15 Aug	Frontier Airlines
13 Aug - 17 Aug	Spirit Airlines
01 Aug - 08 Aug	Air Canada

Also check the deals for one-way flights from Miami to Keflavik in August.

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

Cheapest return flights from Miami to Keflavik in August from 402€

Return flights