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

Return flights

21 Aug - 28 Aug	Spirit Airlines
21 Aug - 25 Aug	Spirit Airlines
22 Aug - 29 Aug	Frontier Airlines
30 Aug - 06 Sep	Spirit Airlines
17 Aug - 20 Aug	Spirit Airlines
13 Aug - 20 Aug	Spirit Airlines
20 Aug - 24 Aug	Spirit Airlines
17 Aug - 24 Aug	Spirit Airlines
01 Aug - 08 Aug	Spirit Airlines
21 Aug - 24 Aug	Spirit Airlines
01 Aug - 04 Aug	Spirit Airlines
29 Aug - 01 Sep	Frontier Airlines
25 Aug - 01 Sep	Spirit Airlines
21 Aug - 01 Sep	Spirit Airlines
23 Aug - 01 Sep	Spirit Airlines

Also check the deals for one-way flights from Philadelphia to Cartagena 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 Cartagena in August from $332

Return flights