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

Return flights

04 May - 20 May	British Airways
06 May - 13 May	British Airways
11 May - 18 May	TAP
07 May - 14 May	Air France
12 May - 19 May	Air Europa
14 May - 21 May	Iberia
17 May - 24 May	Delta
10 May - 17 May	TAP
14 May - 16 May	Air Europa
11 May - 08 Jun	TAP
08 May - 15 May	Air Europa
27 May - 03 Jun	Air Europa
28 May - 04 Jun	Air Europa
30 May - 06 Jun	TAP
31 May - 07 Jun	TAP
29 May - 05 Jun	TAP

Also check the deals for one-way flights from Miami 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 Miami to Porto in May from $476

Return flights