AirHint found the following cheapest return flights from London (LCY) to Madrid (MAD) in October 2026 (see full year).

Return flights

06 Oct - 08 Oct	British Airways	direct
05 Oct - 09 Oct	British Airways	direct
01 Oct - 07 Oct	British Airways	direct
01 Oct - 14 Oct	British Airways	direct
27 Oct - 03 Nov	British Airways	direct
01 Oct - 15 Oct	British Airways	direct
20 Oct - 09 Nov	British Airways	direct
09 Oct - 06 Nov	British Airways	direct
30 Oct - 15 Nov	KLM
03 Oct - 07 Oct	KLM
02 Oct - 04 Oct	ITA Airways
09 Oct - 18 Oct	ITA Airways
24 Oct - 01 Nov	KLM
02 Oct - 18 Oct	KLM

Also check the deals for one-way flights from London to Madrid in October.

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 Madrid in October from $193

Return flights