Cheapest return flights from Philadelphia to Istanbul in December from 577€

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

Return flights

03 Dec - 10 Dec Spirit Airlines
06 Dec - 12 Dec Spirit Airlines
07 Dec - 12 Dec Frontier Airlines
15 Dec - 24 Dec British Airways
30 Dec - 07 Jan Lufthansa
16 Dec - 24 Dec British Airways
11 Dec - 05 Jan Spirit Airlines
17 Dec - 12 Jan jetBlue
24 Dec - 01 Jan Spirit Airlines
20 Dec - 25 Dec Frontier Airlines
20 Dec - 28 Dec Frontier Airlines

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

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