Cheapest return flights from Denver to Istanbul in December from $829

AirHint found the following cheapest return flights from Denver (DEN) to Istanbul (SAW) in December 2025 (see full year).

Return flights

30 Dec - 08 Jan Frontier Airlines
27 Dec - 17 Jan Lufthansa
16 Dec - 10 Jan Frontier Airlines
27 Dec - 07 Jan Lufthansa
04 Dec - 27 Dec Frontier Airlines
29 Dec - 05 Jan Lufthansa
18 Dec - 10 Jan Frontier Airlines
20 Dec - 10 Jan Frontier Airlines
13 Dec - 03 Jan Frontier Airlines
02 Dec - 27 Dec Frontier Airlines
10 Dec - 03 Jan Frontier Airlines
01 Dec - 27 Dec Icelandair
11 Dec - 03 Jan Frontier Airlines
06 Dec - 20 Dec Icelandair
03 Dec - 15 Dec KLM
16 Dec - 30 Dec Lufthansa
13 Dec - 23 Dec Qatar Airways
03 Dec - 22 Dec Emirates
20 Dec - 30 Dec Qatar Airways

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

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