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

Return flights

24 Apr - 27 Apr	Iberia
23 Apr - 27 Apr	Iberia
23 Apr - 28 Apr	Iberia
10 Apr - 12 Apr	Iberia
08 Apr - 12 Apr	Iberia
23 Apr - 26 Apr	SWISS
15 Apr - 19 Apr	SWISS
01 Apr - 04 Apr	Brussels Airlines
01 Apr - 05 Apr	Brussels Airlines
02 Apr - 05 Apr	Lufthansa

Also check the deals for one-way flights from London to Bilbao 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 London to Bilbao in April from 158€

Return flights