AirHint found the following cheapest one-way flights from London (LHR) to Bilbao (BIO) in September 2025 (see full year).

One-Way flights

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23 Sep	Vueling Airlines	direct
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30 Sep	Vueling Airlines	direct
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15 Sep	Vueling Airlines	direct

Also check the deals for return flights from London to Bilbao in September.

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 one-way flights from London to Bilbao in September from $44

One-Way flights