Cheapest return flights from Philadelphia to Istanbul in December from $867

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

Return flights

16 Dec - 23 Dec Delta
30 Dec - 07 Jan Delta
26 Dec - 28 Dec British Airways
15 Dec - 22 Dec Spirit Airlines
19 Dec - 25 Dec Frontier Airlines
21 Dec - 11 Jan Royal Jordanian
19 Dec - 02 Jan Frontier Airlines

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

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