AirHint found the following cheapest return flights from Phoenix (PHX) to Athens (ATH) in September 2025 (see full year).

Return flights

17 Sep - 25 Sep	Lufthansa
10 Sep - 16 Sep	Lufthansa
01 Sep - 23 Sep	Lufthansa
16 Sep - 24 Sep	Air Canada
01 Sep - 22 Sep	Air Canada
23 Sep - 06 Oct	British Airways
20 Sep - 27 Sep	Delta
04 Sep - 11 Sep	United
05 Sep - 14 Sep	Delta
12 Sep - 27 Sep	Delta
02 Sep - 09 Sep	United
26 Sep - 05 Oct	Lufthansa
24 Sep - 01 Oct	United
30 Sep - 07 Oct	United
27 Sep - 04 Oct	United

Also check the deals for one-way flights from Phoenix to Athens in September.

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 Athens in September from $529

Return flights