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

Return flights

24 Aug - 02 Sep	Aer Lingus
11 Aug - 19 Aug	Spirit Airlines
05 Aug - 21 Aug	Aer Lingus
17 Aug - 25 Aug	Frontier Airlines
14 Aug - 21 Aug	KLM
18 Aug - 25 Aug	Air France
08 Aug - 20 Aug	Delta
20 Aug - 27 Aug	United
26 Aug - 02 Sep	United	direct
24 Aug - 07 Sep	Aer Lingus
24 Aug - 02 Sep	Discover Airlines	direct
21 Aug - 04 Sep	Condor
18 Aug - 25 Aug	Lufthansa	direct
10 Aug - 17 Aug	Air France
22 Aug - 29 Aug	Discover Airlines	direct
21 Aug - 04 Sep	United	direct
24 Aug - 07 Sep	Discover Airlines	direct
31 Aug - 07 Sep	Discover Airlines	direct
28 Aug - 04 Sep	United
28 Aug - 04 Sep	Discover Airlines	direct

Also check the deals for one-way flights from Philadelphia to Frankfurt 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 Frankfurt in August from 505€

Return flights