AirHint found the following cheapest return flights from London (LCY) to Porto (OPO) in July 2026 (see full year).

Return flights

03 Jul - 06 Jul	Luxair
02 Jul - 06 Jul	Luxair
02 Jul - 08 Jul	SWISS
03 Jul - 08 Jul	SWISS
26 Jul - 06 Aug	SWISS
27 Jul - 06 Aug	KLM
20 Jul - 25 Jul	KLM
11 Jul - 18 Jul	KLM
31 Jul - 25 Aug	KLM
29 Jul - 13 Aug	Lufthansa
22 Jul - 25 Jul	Lufthansa
25 Jul - 08 Aug	KLM
22 Jul - 26 Jul	KLM
29 Jul - 08 Aug	KLM
24 Jul - 24 Aug	KLM

Also check the deals for one-way flights from London to Porto in July.

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 July from 289€

Return flights