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

Return flights

30 Dec - 08 Jan	Gulf Air
28 Dec - 13 Jan	Turkish Airlines	direct
28 Dec - 26 Jan	Turkish Airlines	direct
31 Dec - 11 Jan	Turkish Airlines	direct
31 Dec - 07 Jan	Gulf Air
25 Dec - 08 Jan	Gulf Air
26 Dec - 15 Jan	Turkish Airlines	direct
29 Dec - 07 Jan	Emirates
30 Dec - 09 Jan	Gulf Air
27 Dec - 07 Jan	Gulf Air
09 Dec - 13 Dec	IndiGo
16 Dec - 24 Dec	Emirates
15 Dec - 26 Dec	Scoot
19 Dec - 29 Dec	Scoot
10 Dec - 17 Dec	Malaysia Airlines
25 Dec - 29 Dec	Turkish Airlines
09 Dec - 17 Dec	IndiGo
10 Dec - 18 Dec	IndiGo
09 Dec - 18 Dec	IndiGo
22 Dec - 29 Dec	Scoot

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 458€

Return flights