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

Return flights

30 Oct - 30 Nov	KLM
31 Oct - 06 Nov	Lufthansa
30 Oct - 05 Nov	KLM
31 Oct - 04 Nov	Lufthansa
29 Oct - 31 Oct	Lufthansa
30 Oct - 31 Oct	Lufthansa
28 Oct - 29 Oct	SWISS
30 Oct - 30 Oct	Lufthansa
30 Oct - 03 Nov	KLM
29 Oct - 01 Nov	Luxair
29 Oct - 03 Nov	KLM
29 Oct - 29 Oct	SWISS
28 Oct - 03 Nov	SWISS
30 Oct - 02 Nov	KLM
29 Oct - 30 Oct	Luxair
29 Oct - 02 Nov	KLM
28 Oct - 30 Oct	SWISS
31 Oct - 31 Oct	SWISS
28 Oct - 28 Oct	Luxair

Also check the deals for one-way flights from London to Porto 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 Porto in October from $476

Return flights