Cheapest return flights from Houston to Keflavik in December from 673€

AirHint found the following cheapest return flights from Houston (IAH) to Keflavik (KEF) in December 2025 (see full year).

Return flights

09 Dec - 16 Dec Frontier Airlines
04 Dec - 11 Dec Frontier Airlines
06 Dec - 16 Dec Frontier Airlines
09 Dec - 15 Dec Spirit Airlines
03 Dec - 17 Dec Spirit Airlines
16 Dec - 23 Dec Frontier Airlines
24 Dec - 28 Dec Frontier Airlines
23 Dec - 30 Dec Frontier Airlines
16 Dec - 02 Jan Spirit Airlines

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

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