AirHint found the following cheapest return flights from Philadelphia (PHL) to Athens (ATH) in August 2025 (see full year).

Return flights

26 Aug - 02 Sep	United
20 Aug - 27 Aug	United
28 Aug - 04 Sep	United
31 Aug - 07 Sep	United
18 Aug - 25 Aug	United
22 Aug - 29 Aug	United
20 Aug - 24 Aug	Frontier Airlines
14 Aug - 21 Aug	United
25 Aug - 07 Sep	United
12 Aug - 19 Aug	United
28 Aug - 07 Sep	Air France
02 Aug - 13 Aug	Frontier Airlines
29 Aug - 07 Sep	Delta
03 Aug - 13 Aug	British Airways	direct
01 Aug - 12 Aug	Spirit Airlines
24 Aug - 31 Aug	United

Also check the deals for one-way flights from Philadelphia to Athens in August.

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 Philadelphia to Athens in August from 628€

Return flights