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

Return flights

10 Apr - 13 Apr	easyJet	direct
09 Apr - 13 Apr	easyJet
08 Apr - 12 Apr	Vueling Airlines
09 Apr - 12 Apr	Vueling Airlines
08 Apr - 10 Apr	Vueling Airlines
10 Apr - 12 Apr	easyJet
10 Apr - 14 Apr	easyJet
08 Apr - 13 Apr	Vueling Airlines
11 Apr - 13 Apr	Vueling Airlines
08 Apr - 09 Apr	Vueling Airlines

Also check the deals for one-way flights from Bilbao to Basel 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 Basel in April from 115€

Return flights