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

Return flights

06 Jan - 15 Jan	Icelandair
16 Jan - 30 Jan	Turkish Airlines	direct
13 Jan - 27 Jan	Turkish Airlines	direct
06 Jan - 15 Jan	Turkish Airlines	direct
30 Jan - 10 Feb	Icelandair
30 Jan - 10 Feb	Turkish Airlines	direct
01 Jan - 08 Jan	Turkish Airlines	direct

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

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Denver to Istanbul in January from $839

Return flights