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

Return flights

10 Aug - 26 Aug	United
18 Aug - 03 Sep	Air Canada
27 Aug - 03 Sep	United
19 Aug - 26 Aug	United
21 Aug - 04 Sep	United
21 Aug - 28 Aug	United
29 Aug - 05 Sep	United
29 Aug - 09 Sep	United
31 Aug - 07 Sep	United
29 Aug - 08 Sep	Lufthansa
10 Aug - 21 Aug	British Airways
10 Aug - 26 Aug	British Airways	direct
18 Aug - 03 Sep	Finnair	direct
19 Aug - 22 Aug	Spirit Airlines
09 Aug - 18 Aug	Frontier Airlines
30 Aug - 08 Sep	Air Canada
21 Aug - 04 Sep	Iberia	direct
15 Aug - 22 Aug	United
03 Aug - 20 Aug	Delta
04 Aug - 20 Aug	Delta

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 485€

Return flights