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

Return flights

22 Dec - 12 Jan	IndiGo
03 Dec - 08 Dec	AZAL
18 Dec - 23 Dec	IndiGo
22 Dec - 27 Dec	IndiGo
19 Dec - 24 Dec	IndiGo
01 Dec - 08 Dec	IndiGo
24 Dec - 30 Dec	IndiGo
04 Dec - 07 Dec	AZAL
03 Dec - 07 Dec	AZAL
22 Dec - 01 Jan	Flynas
22 Dec - 05 Jan	Flynas
18 Dec - 24 Dec	IndiGo
24 Dec - 01 Jan	Flynas
12 Dec - 16 Dec	Air Arabia
23 Dec - 05 Jan	Flynas
26 Dec - 17 Jan	Air India
27 Dec - 01 Jan	Kuwait Airways
25 Dec - 01 Jan	Kuwait Airways
29 Dec - 05 Jan	Flynas
26 Dec - 04 Jan	Flynas

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

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 Delhi to Istanbul in December from $364

Return flights