Cheapest return flights from London to Porto in April from $229

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 April 2025 (see full year).

Return flights

08 Apr - 14 Apr SWISS
10 Apr - 14 Apr SWISS
02 Apr - 09 Apr SWISS
02 Apr - 06 Apr SWISS
11 Apr - 14 Apr SWISS
03 Apr - 07 Apr SWISS
09 Apr - 13 Apr SWISS
10 Apr - 23 Apr SWISS
09 Apr - 23 Apr SWISS
10 Apr - 17 Apr SWISS
30 Apr - 05 May SWISS
30 Apr - 04 May KLM
26 Apr - 03 May KLM

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

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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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