Cheapest return MCI–KEF flights, September

AirHint found the following cheapest return flights from Kansas City (MCI) to Keflavik (KEF) in September 2026 (see full year).

Return flights

09 Sep - 17 Sep Frontier Airlines
12 Sep - 20 Sep Frontier Airlines
03 Sep - 11 Sep Frontier Airlines
02 Sep - 10 Sep Frontier Airlines
05 Sep - 13 Sep Frontier Airlines
10 Sep - 18 Sep Frontier Airlines
10 Sep - 17 Sep Frontier Airlines
08 Sep - 16 Sep Air Canada
07 Sep - 15 Sep Air Canada
14 Sep - 22 Sep Air Canada
23 Sep - 01 Oct Air Canada
24 Sep - 02 Oct Air Canada
26 Sep - 04 Oct Air Canada
27 Sep - 05 Oct Air Canada
25 Sep - 03 Oct Air Canada

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

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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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