Cheapest return flights from London to Porto in May from $265

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

06 May - 13 May SWISS
13 May - 20 May SWISS
15 May - 20 May SWISS
15 May - 04 Jun SWISS
10 May - 13 May SWISS
02 May - 05 May Luxair
16 May - 20 May SWISS
17 May - 20 May SWISS
13 May - 19 May SWISS
22 May - 27 May SWISS
20 May - 23 May Luxair
31 May - 06 Jun KLM
30 May - 02 Jun Luxair
18 May - 14 Jun KLM
24 May - 08 Jun KLM
29 May - 02 Jun Luxair
18 May - 15 Jun KLM
30 May - 01 Jun SWISS
27 May - 01 Jun SWISS
26 May - 01 Jun SWISS

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

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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