AirHint found the following cheapest return flights from Islamabad (ISB) to Singapore (SIN) in December 2025 (see full year).
Return flights
| 15 Dec - 31 Dec | Qatar Airways | ||
| 26 Dec - 06 Jan | Fly Jinnah | ||
| 23 Dec - 02 Jan | Emirates | ||
| 10 Dec - 17 Dec | Qatar Airways | ||
| 28 Dec - 04 Jan | Fly Jinnah |
Also check the deals for one-way flights from Islamabad to Singapore in December.
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