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

Return flights

21 Aug - 29 Aug	Spirit Airlines
06 Aug - 11 Aug	Spirit Airlines
20 Aug - 30 Aug	Spirit Airlines
24 Aug - 30 Aug	Spirit Airlines
24 Aug - 30 Aug	Icelandair	direct
24 Aug - 26 Aug	Spirit Airlines
21 Aug - 31 Aug	Spirit Airlines
29 Aug - 05 Sep	Spirit Airlines
02 Aug - 08 Aug	Spirit Airlines
07 Aug - 12 Aug	Spirit Airlines
16 Aug - 23 Aug	Air Canada
23 Aug - 01 Sep	Spirit Airlines
23 Aug - 01 Sep	Icelandair	direct

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

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Cheapest return flights from Orlando to Keflavik in August from 385€

Return flights