Cheapest return flights from London to Porto in August from $268

Best time to book flights for London (LCY) to Porto (OPO) flights at AirHint

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

Return flights

25 Aug - 03 Sep SWISS
12 Aug - 21 Aug SWISS
04 Aug - 07 Aug SWISS
25 Aug - 28 Aug SWISS
11 Aug - 25 Aug SWISS
23 Aug - 27 Aug SWISS
04 Aug - 18 Aug SWISS
01 Aug - 03 Aug KLM
22 Aug - 25 Aug Lufthansa
15 Aug - 18 Aug Lufthansa
11 Aug - 24 Aug SWISS
29 Aug - 05 Sep Luxair
30 Aug - 06 Sep KLM

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

Skyscanner

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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