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

Return flights

30 Aug - 31 Aug	Delta
15 Aug - 22 Aug	Finnair
14 Aug - 27 Aug	British Airways
14 Aug - 27 Aug	Finnair	direct
30 Aug - 31 Aug	American Airlines	direct
10 Aug - 13 Sep	Lufthansa
05 Aug - 08 Aug	Lufthansa
07 Aug - 08 Aug	Ryanair
07 Aug - 08 Aug	Finnair	direct

Also check the deals for one-way flights from Copenhagen to Philadelphia 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 Copenhagen to Philadelphia in August from $484

Return flights