Cheapest return flights from Philadelphia to Istanbul in December from $556

AirHint found the following cheapest return flights from Philadelphia (PHL) to Istanbul (IST) in December 2025 (see full year).

Return flights

08 Dec - 08 Jan Frontier Airlines
08 Dec - 15 Dec Frontier Airlines
14 Dec - 11 Jan Spirit Airlines
13 Dec - 11 Jan Spirit Airlines
12 Dec - 11 Jan Spirit Airlines
15 Dec - 11 Jan Frontier Airlines
06 Dec - 13 Dec Air France
30 Dec - 07 Jan British Airways
21 Dec - 11 Jan British Airways
20 Dec - 10 Jan Frontier Airlines
19 Dec - 09 Jan Frontier Airlines
21 Dec - 04 Jan jetBlue

Also check the deals for one-way flights from Philadelphia to Istanbul in December.

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