AirHint found the following cheapest return flights from London (LCY) to Porto (OPO) in April 2026 (see full year).

Return flights

27 Apr - 01 May	Luxair
24 Apr - 27 Apr	Luxair
17 Apr - 20 Apr	Luxair
30 Apr - 07 May	KLM
25 Apr - 29 Apr	Luxair
02 Apr - 06 Apr	KLM
16 Apr - 19 Apr	SWISS
01 Apr - 07 Apr	Luxair
22 Apr - 26 Apr	KLM
03 Apr - 05 Apr	Luxair
16 Apr - 18 Apr	KLM
17 Apr - 19 Apr	KLM

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

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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Cheapest return flights from London to Porto in April from $306

Return flights