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

Return flights

14 Mar - 16 Mar	Luxair
06 Mar - 09 Mar	Luxair
13 Mar - 15 Mar	Luxair
20 Mar - 23 Mar	Luxair
02 Mar - 05 Mar	Luxair
19 Mar - 23 Mar	Luxair
09 Mar - 17 Mar	Lufthansa
13 Mar - 16 Mar	Luxair
13 Mar - 20 Mar	Luxair
31 Mar - 06 Apr	KLM
31 Mar - 07 Apr	KLM
13 Mar - 17 Mar	Luxair

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

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 March from 220€

Return flights