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

Return flights

02 May - 09 May	British Airways
12 May - 19 May	British Airways
01 May - 12 May	Lufthansa
01 May - 08 May	Delta
26 May - 02 Jun	WestJet
27 May - 03 Jun	United
28 May - 04 Jun	United
30 May - 06 Jun	WestJet
29 May - 05 Jun	Air Transat
31 May - 07 Jun	United
21 May - 29 May	Delta

Also check the deals for one-way flights from Phoenix 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 Phoenix to Porto in May from $582

Return flights