AirHint found the following cheapest return flights from London (LCY) to Lisbon (LIS) in October 2025 (see full year).

Return flights

28 Oct - 05 Nov	SWISS
28 Oct - 04 Nov	SWISS
28 Oct - 12 Nov	SWISS
27 Oct - 05 Nov	SWISS
27 Oct - 07 Nov	SWISS
28 Oct - 27 Nov	SWISS
29 Oct - 12 Nov	Lufthansa
29 Oct - 05 Nov	Lufthansa
29 Oct - 04 Nov	Lufthansa
24 Oct - 04 Nov	SWISS
28 Oct - 29 Oct	SWISS
28 Oct - 30 Oct	SWISS
27 Oct - 30 Oct	SWISS
24 Oct - 30 Oct	SWISS
24 Oct - 29 Oct	SWISS
24 Oct - 26 Oct	SWISS
27 Oct - 29 Oct	Lufthansa
24 Oct - 28 Oct	Lufthansa
28 Oct - 31 Oct	Lufthansa
28 Oct - 28 Oct	SWISS

Also check the deals for one-way flights from London to Lisbon 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 Lisbon in October from 257€

Return flights