Cheapest return flights from Houston to Keflavik in May from $576

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

Return flights

04 May - 12 May Frontier Airlines
05 May - 12 May Spirit Airlines
13 May - 20 May Spirit Airlines
12 May - 20 May Spirit Airlines
04 May - 11 May Frontier Airlines
12 May - 19 May Spirit Airlines
11 May - 19 May Frontier Airlines
18 May - 26 May Frontier Airlines
06 May - 14 May Frontier Airlines
11 May - 18 May Frontier Airlines
27 May - 03 Jun Spirit Airlines
30 May - 06 Jun Spirit Airlines
26 May - 02 Jun Spirit Airlines
26 May - 03 Jun Spirit Airlines
28 May - 05 Jun Spirit Airlines
24 May - 01 Jun Frontier Airlines
29 May - 05 Jun Spirit Airlines
30 May - 07 Jun Frontier Airlines
28 May - 04 Jun Spirit Airlines
27 May - 04 Jun Spirit Airlines

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

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