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

Return flights

14 Oct - 21 Oct	Spirit Airlines
01 Oct - 08 Oct	Spirit Airlines
13 Oct - 20 Oct	Spirit Airlines
15 Oct - 22 Oct	Spirit Airlines
04 Oct - 11 Oct	Spirit Airlines
02 Oct - 09 Oct	Spirit Airlines
12 Oct - 19 Oct	Spirit Airlines
05 Oct - 12 Oct	Spirit Airlines
08 Oct - 15 Oct	Spirit Airlines
17 Oct - 24 Oct	Spirit Airlines
28 Oct - 04 Nov	Spirit Airlines
27 Oct - 03 Nov	Spirit Airlines
31 Oct - 07 Nov	Spirit Airlines
30 Oct - 06 Nov	Spirit Airlines
29 Oct - 05 Nov	Spirit Airlines
26 Oct - 02 Nov	Spirit Airlines

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

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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Cheapest return flights from Houston to Keflavik in October from 280€

Return flights