AirHint found the following cheapest return flights from Houston (IAH) to Keflavik (KEF) in August 2026 (see full year).

Return flights

25 Aug - 01 Sep	Spirit Airlines
24 Aug - 31 Aug	United
24 Aug - 01 Sep	United
26 Aug - 03 Sep	United
25 Aug - 02 Sep	United
28 Aug - 05 Sep	Spirit Airlines
11 Aug - 18 Aug	Air Canada
31 Aug - 08 Sep	Air Canada
12 Aug - 19 Aug	Air Canada
29 Aug - 06 Sep	Spirit Airlines
27 Aug - 04 Sep	Brussels Airlines
30 Aug - 07 Sep	United
13 Aug - 20 Aug	Air Canada
14 Aug - 21 Aug	Air Canada
15 Aug - 22 Aug	Air Canada
03 Aug - 11 Aug	WestJet
01 Aug - 09 Aug	Spirit Airlines
04 Aug - 11 Aug	WestJet
01 Aug - 08 Aug	Spirit Airlines

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

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 August from $804

Return flights