Cheapest return flights from Denver to Istanbul in January from $572

AirHint found the following cheapest return flights from Denver (DEN) to Istanbul (IST) in January 2026 (see full year).

Return flights

08 Jan - 22 Jan Frontier Airlines
21 Jan - 14 Feb Icelandair
27 Jan - 21 Feb Frontier Airlines
09 Jan - 16 Jan Frontier Airlines
22 Jan - 14 Feb Frontier Airlines
08 Jan - 31 Jan Frontier Airlines
27 Jan - 21 Feb Turkish Airlines direct
22 Jan - 14 Feb Turkish Airlines direct
06 Jan - 24 Jan Frontier Airlines
08 Jan - 31 Jan Turkish Airlines direct
06 Jan - 24 Jan Turkish Airlines direct
08 Jan - 22 Jan Turkish Airlines direct
09 Jan - 16 Jan Turkish Airlines direct
07 Jan - 21 Jan Icelandair
03 Jan - 17 Jan Turkish Airlines direct

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

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