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

Return flights

04 Dec - 11 Dec	Gulf Air
30 Dec - 07 Jan	Gulf Air
26 Dec - 07 Jan	Gulf Air
25 Dec - 08 Jan	Gulf Air
28 Dec - 08 Jan	Gulf Air
17 Dec - 25 Dec	Gulf Air
01 Dec - 08 Dec	Gulf Air
13 Dec - 25 Dec	Gulf Air
26 Dec - 10 Jan	Gulf Air
30 Dec - 06 Jan	Gulf Air
31 Dec - 07 Jan	Gulf Air
08 Dec - 15 Dec	Qatar Airways
09 Dec - 16 Dec	Qatar Airways
10 Dec - 17 Dec	Qatar Airways
02 Dec - 09 Dec	Turkish Airlines	direct
19 Dec - 27 Dec	Turkish Airlines	direct
08 Dec - 19 Dec	Qatar Airways
30 Dec - 07 Jan	Turkish Airlines	direct
28 Dec - 06 Jan	Turkish Airlines	direct
28 Dec - 08 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 $557

Return flights