Cheapest return flights from Houston to Keflavik in September from $547

Best time to book flights for Houston (HOU) to Keflavik (KEF) flights at AirHint

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

Return flights

09 Sep - 16 Sep Spirit Airlines
09 Sep - 17 Sep Spirit Airlines
10 Sep - 17 Sep Spirit Airlines
24 Sep - 01 Oct Spirit Airlines
03 Sep - 10 Sep Spirit Airlines
23 Sep - 30 Sep Spirit Airlines
10 Sep - 18 Sep Spirit Airlines
08 Sep - 16 Sep Spirit Airlines
17 Sep - 24 Sep Spirit Airlines
07 Sep - 15 Sep Spirit Airlines
19 Sep - 27 Sep Spirit Airlines

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

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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