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

Return flights

01 Mar - 10 Mar	KLM
02 Mar - 04 Mar	Iberia
03 Mar - 09 Mar	Iberia
04 Mar - 10 Mar	Iberia
06 Mar - 12 Mar	Iberia
10 Mar - 16 Mar	Iberia
03 Mar - 06 Mar	Iberia
04 Mar - 06 Mar	Iberia
04 Mar - 09 Mar	Iberia
15 Mar - 18 Mar	Iberia
31 Mar - 06 Apr	KLM
27 Mar - 02 Apr	Luxair
28 Mar - 01 Apr	KLM
27 Mar - 04 Apr	Luxair
28 Mar - 03 Apr	KLM
28 Mar - 11 Apr	KLM

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 200€

Return flights