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

Return flights

13 Dec - 10 Jan	Pegasus Airlines
01 Dec - 06 Dec	AirAsia X
10 Dec - 14 Dec	Gulf Air
08 Dec - 15 Dec	Gulf Air
18 Dec - 29 Dec	Gulf Air
21 Dec - 29 Dec	AirAsia X
07 Dec - 12 Dec	AZAL
02 Dec - 23 Dec	AZAL
10 Dec - 21 Dec	Gulf Air
15 Dec - 25 Jan	AirAsia X
21 Dec - 09 Jan	AirAsia X
19 Dec - 28 Dec	AirAsia X
16 Dec - 01 Jan	AZAL
05 Dec - 14 Dec	IndiGo
26 Dec - 16 Jan	AirAsia X
22 Dec - 01 Jan	AirAsia X
30 Dec - 13 Jan	Turkish Airlines	direct
25 Dec - 08 Jan	Qatar Airways
16 Dec - 01 Jan	Turkish Airlines	direct
30 Dec - 10 Jan	Gulf Air

Also check the deals for one-way flights from Istanbul to Singapore 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 Istanbul to Singapore in December from 438€

Return flights