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

Return flights

20 Mar - 25 Mar	Luxair
19 Mar - 22 Mar	Luxair
12 Mar - 15 Mar	Luxair
06 Mar - 11 Mar	Luxair
14 Mar - 15 Mar	Luxair
02 Mar - 06 Mar	KLM
14 Mar - 14 Mar	Luxair
06 Mar - 10 Mar	KLM
17 Mar - 22 Mar	Luxair
12 Mar - 22 Mar	Luxair
31 Mar - 07 Apr	KLM
25 Mar - 03 Apr	Iberia
31 Mar - 03 Apr	KLM
05 Mar - 16 Apr	KLM
13 Mar - 20 Apr	KLM
30 Mar - 07 Apr	KLM
31 Mar - 25 Apr	KLM
30 Mar - 03 Apr	KLM
26 Mar - 01 Apr	KLM
30 Mar - 02 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 160€

Return flights