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

Return flights

30 Dec - 15 Jan	Turkish Airlines	direct
28 Dec - 13 Jan	Turkish Airlines	direct
01 Dec - 05 Dec	Gulf Air
03 Dec - 09 Dec	Gulf Air
03 Dec - 10 Dec	Gulf Air
30 Dec - 08 Jan	Gulf Air
04 Dec - 08 Dec	AirAsia
29 Dec - 07 Jan	Gulf Air
03 Dec - 11 Dec	Gulf Air
28 Dec - 07 Jan	Emirates
31 Dec - 07 Jan	Gulf Air
30 Dec - 06 Jan	Gulf Air
03 Dec - 06 Jan	Gulf Air
03 Dec - 05 Jan	Malaysia Airlines
04 Dec - 09 Dec	Emirates
02 Dec - 09 Dec	Emirates
06 Dec - 15 Dec	AirAsia
07 Dec - 14 Dec	AirAsia
08 Dec - 22 Dec	Gulf Air
29 Dec - 05 Jan	Turkish Airlines

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 453€

Return flights