Cheapest return flights from Philadelphia to Istanbul in December from 728€

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

Return flights

28 Dec - 17 Jan British Airways
29 Dec - 24 Jan British Airways
25 Dec - 17 Jan British Airways
30 Dec - 07 Jan Lufthansa
20 Dec - 10 Jan Frontier Airlines
06 Dec - 07 Dec Aer Lingus
22 Dec - 29 Dec Frontier Airlines
30 Dec - 04 Jan Lufthansa
18 Dec - 04 Jan Spirit Airlines
19 Dec - 04 Jan Spirit Airlines

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

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