AirHint found the following cheapest return flights from Houston (IAH) to Keflavik (KEF) in May 2026 (see full year).
Return flights
| 09 May - 14 May | Spirit Airlines | ||
| 02 May - 09 May | Spirit Airlines | ||
| 29 May - 12 Jun | Icelandair | ||
| 29 May - 07 Jun | Frontier Airlines | ||
| 21 May - 04 Jun | Frontier Airlines |
Also check the deals for one-way flights from Houston to Keflavik in May.
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