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

Return flights

23 Apr - 03 May	Vueling Airlines
13 Apr - 20 Apr	easyJet
13 Apr - 19 Apr	easyJet
11 Apr - 20 Apr	Vueling Airlines
09 Apr - 16 Apr	Vueling Airlines
12 Apr - 19 Apr	Wizz Air UK
06 Apr - 12 Apr	Air Europa
01 Apr - 08 Apr	Norwegian
02 Apr - 11 Apr	easyJet

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

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 April from $271

Return flights