Cheapest return HOU–KEF flights, September

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

Return flights

09 Sep - 16 Sep Spirit Airlines
29 Sep - 06 Oct Icelandair
05 Sep - 12 Sep Icelandair
04 Sep - 11 Sep Icelandair
11 Sep - 18 Sep Icelandair
12 Sep - 19 Sep Icelandair
30 Sep - 07 Oct jetBlue
22 Sep - 29 Sep jetBlue
10 Sep - 17 Sep jetBlue
13 Sep - 20 Sep jetBlue
14 Sep - 21 Sep jetBlue
11 Sep - 20 Sep Icelandair

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

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