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

Return flights

22 Dec - 07 Jan	Gulf Air
01 Dec - 12 Dec	IndiGo
02 Dec - 05 Dec	Etihad Airways
04 Dec - 11 Dec	Gulf Air
03 Dec - 06 Dec	Gulf Air
25 Dec - 23 Jan	Gulf Air
07 Dec - 15 Dec	Gulf Air
03 Dec - 11 Dec	Gulf Air
07 Dec - 11 Dec	Gulf Air
06 Dec - 10 Dec	Gulf Air
06 Dec - 11 Dec	Gulf Air
01 Dec - 08 Dec	Gulf Air
31 Dec - 07 Jan	Gulf Air
25 Dec - 08 Jan	Gulf Air
25 Dec - 07 Jan	Gulf Air
30 Dec - 07 Jan	Gulf Air
30 Dec - 06 Jan	Gulf Air
24 Dec - 01 Jan	Gulf Air
17 Dec - 01 Jan	Gulf Air
30 Dec - 06 Jan	Turkish Airlines	direct

Also check the deals for one-way flights from Singapore 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 Singapore to Istanbul in December from 420€

Return flights