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

Return flights

02 May - 05 May	British Airways
03 May - 10 May	British Airways
02 May - 09 May	KLM
01 May - 09 May	British Airways
05 May - 12 May	Finnair
04 May - 11 May	Air France
07 May - 14 May	British Airways
09 May - 16 May	Finnair
11 May - 18 May	Finnair
06 May - 13 May	Air Canada
25 May - 03 Jun	Lufthansa
25 May - 04 Jun	Lufthansa
28 May - 04 Jun	Iberia
25 May - 01 Jun	Finnair

Also check the deals for one-way flights from Phoenix to Lisbon 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 Lisbon in May from $526

Return flights