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

Return flights

18 Apr - 25 Apr	Iberia
20 Apr - 23 Apr	Iberia
13 Apr - 20 Apr	Iberia
29 Apr - 02 May	Iberia
10 Apr - 12 Apr	Iberia
18 Apr - 24 Apr	British Airways
15 Apr - 18 Apr	SWISS
30 Apr - 06 May	SWISS
21 Apr - 27 Apr	Iberia
10 Apr - 13 Apr	Iberia
19 Apr - 25 Apr	Iberia
14 Apr - 21 Apr	Lufthansa
30 Apr - 03 May	TAP
30 Apr - 09 May	Iberia

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 180€

Return flights