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

Return flights

05 Mar - 09 Mar	Vueling Airlines
10 Mar - 17 Mar	Vueling Airlines
11 Mar - 18 Mar	Vueling Airlines
01 Mar - 08 Mar	Vueling Airlines
06 Mar - 13 Mar	Vueling Airlines
06 Mar - 14 Mar	Vueling Airlines
18 Mar - 22 Mar	KLM
15 Mar - 22 Mar	KLM
27 Mar - 07 Apr	Vueling Airlines
27 Mar - 08 Apr	Vueling Airlines
28 Mar - 07 Apr	easyJet
28 Mar - 08 Apr	easyJet
28 Mar - 11 Apr	easyJet
31 Mar - 08 Apr	Vueling Airlines
27 Mar - 04 Apr	Vueling Airlines
28 Mar - 04 Apr	easyJet
28 Mar - 05 Apr	easyJet
27 Mar - 03 Apr	Vueling Airlines

Also check the deals for one-way flights from Bilbao to Keflavik in March.

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 March from $177

Return flights