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

Return flights

26 Aug - 03 Sep	Norwegian
28 Aug - 06 Sep	Air Europa
29 Aug - 06 Sep	Vueling Airlines
26 Aug - 05 Sep	Norwegian
31 Aug - 05 Sep	Volotea
18 Aug - 29 Aug	Vueling Airlines
24 Aug - 30 Aug	Air Europa
23 Aug - 30 Aug	Vueling Airlines
01 Aug - 12 Aug	Vueling Airlines
01 Aug - 11 Aug	Vueling Airlines
20 Aug - 31 Aug	Air Europa
19 Aug - 29 Aug	Vueling Airlines
01 Aug - 14 Aug	Vueling Airlines
11 Aug - 23 Aug	Vueling Airlines
15 Aug - 29 Aug	Air Europa
19 Aug - 05 Sep	Vueling Airlines

Also check the deals for one-way flights from Bilbao 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 Bilbao to Keflavik in August from $296

Return flights