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

Return flights

29 Oct - 12 Nov	Delta
02 Oct - 05 Oct	Frontier Airlines
02 Oct - 09 Oct	Frontier Airlines
30 Oct - 13 Nov	Delta
15 Oct - 22 Oct	Lufthansa	direct
30 Oct - 06 Nov	Lufthansa	direct
10 Oct - 17 Oct	Lufthansa	direct
02 Oct - 16 Oct	Delta
20 Oct - 27 Oct	United
25 Oct - 01 Nov	United
02 Oct - 12 Oct	Condor
05 Oct - 12 Oct	United	direct
30 Oct - 13 Nov	Lufthansa	direct
02 Oct - 05 Oct	Discover Airlines	direct
02 Oct - 09 Oct	United	direct

Also check the deals for one-way flights from Philadelphia to Frankfurt in October.

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 October from 560€

Return flights