Cheapest return flights from London to Porto in May from $239

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 May 2025 (see full year).

Return flights

30 May - 03 Jun KLM
30 May - 04 Jun SWISS
29 May - 04 Jun SWISS
17 May - 27 May SWISS
17 May - 24 May SWISS
19 May - 28 May KLM
20 May - 28 May KLM
17 May - 22 May SWISS
17 May - 26 May SWISS
17 May - 21 May SWISS
17 May - 20 May SWISS
30 May - 05 Jun SWISS
29 May - 05 Jun SWISS
29 May - 02 Jun SWISS
15 May - 26 May SWISS
30 May - 08 Jun SWISS
17 May - 18 Jun SWISS
21 May - 28 May KLM
15 May - 03 Jun SWISS
27 May - 03 Jun Lufthansa

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

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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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