Cheapest return flights from London to Porto in July from $334

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 July 2025 (see full year).

Return flights

08 Jul - 15 Jul Lufthansa
16 Jul - 22 Jul SWISS
07 Jul - 11 Jul SWISS
29 Jul - 12 Aug SWISS
08 Jul - 10 Jul Lufthansa
17 Jul - 23 Jul Lufthansa
10 Jul - 15 Jul SWISS
09 Jul - 14 Jul SWISS
18 Jul - 21 Jul Luxair
09 Jul - 11 Jul SWISS
14 Jul - 20 Jul SWISS
28 Jul - 04 Aug SWISS
29 Jul - 11 Aug KLM
24 Jul - 21 Aug Lufthansa

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

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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