Cheapest return flights from Houston to Keflavik in May from $593

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

Return flights

06 May - 13 May Spirit Airlines
02 May - 09 May Spirit Airlines
04 May - 11 May Frontier Airlines
05 May - 12 May Frontier Airlines
01 May - 08 May Frontier Airlines
09 May - 16 May Spirit Airlines
16 May - 23 May Spirit Airlines
05 May - 13 May Spirit Airlines
27 May - 03 Jun Spirit Airlines
08 May - 15 May Spirit Airlines
23 May - 30 May Spirit Airlines
30 May - 06 Jun Spirit Airlines
25 May - 01 Jun WestJet
29 May - 05 Jun Spirit Airlines
28 May - 04 Jun Spirit Airlines
31 May - 07 Jun Spirit Airlines
29 May - 12 Jun Alaska Airlines

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

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