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

Return flights

18 May - 02 Jun	Avianca
05 May - 26 May	Iberia
05 May - 16 May	Iberia
27 May - 09 Jun	Avianca
28 May - 09 Jun	Avianca
18 May - 03 Jun	Avianca
26 May - 10 Jun	TAP
11 May - 18 May	Ethiopian Airlines
13 May - 19 May	Ethiopian Airlines
21 May - 12 Jun	Avianca
27 May - 12 Jun	Avianca
26 May - 11 Jun	TAP
26 May - 02 Jun	TAP
17 May - 27 May	Air Europa
29 May - 14 Jun	Avianca
04 May - 11 May	Iberia
11 May - 21 May	Air Europa
05 May - 12 May	Iberia
07 May - 14 May	Iberia
09 May - 26 May	Iberia

Also check the deals for one-way flights from Sao Paulo to Porto in May.

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 May from $748

Return flights