Cheapest return flights from Houston to Keflavik in September from $579

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

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

Return flights

16 Sep - 23 Sep Spirit Airlines
17 Sep - 24 Sep Spirit Airlines
11 Sep - 18 Sep Spirit Airlines
30 Sep - 07 Oct Air France
28 Sep - 05 Oct Air France
14 Sep - 21 Sep Air France
18 Sep - 25 Sep Air France
21 Sep - 28 Sep Air France
13 Sep - 20 Sep Spirit Airlines
01 Sep - 08 Sep Air Canada

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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