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

Return flights

04 Mar - 12 Mar	Royal Air Maroc
18 Mar - 27 Mar	Royal Air Maroc
13 Mar - 22 Mar	Royal Air Maroc
04 Mar - 15 Mar	Royal Air Maroc
04 Mar - 27 Mar	Royal Air Maroc
25 Mar - 10 Apr	Royal Air Maroc
13 Mar - 26 Mar	Royal Air Maroc
15 Mar - 27 Mar	Royal Air Maroc
08 Mar - 23 Mar	SWISS
08 Mar - 20 Mar	SWISS
10 Mar - 16 Mar	LATAM Airlines Group
25 Mar - 07 Apr	Iberia
25 Mar - 08 Apr	Iberia
25 Mar - 09 Apr	Iberia
17 Mar - 30 Apr	SWISS
27 Mar - 08 Apr	Air Europa
27 Mar - 09 Apr	Air Europa
27 Mar - 30 Apr	Royal Air Maroc
10 Mar - 04 Apr	Air Europa
17 Mar - 30 Apr	TAP	direct

Also check the deals for one-way flights from Sao Paulo 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 Sao Paulo to Porto in March from 484€

Return flights