AirHint found the following cheapest return flights from Istanbul (IST) to Islamabad (ISB) in September 2026 (see full year).
Return flights
| 20 Sep - 20 Oct | Gulf Air | ||
| 22 Sep - 22 Oct | Flynas | ||
| 02 Sep - 30 Sep | AZAL | ||
| 22 Sep - 22 Oct | Turkish Airlines | direct | |
| 20 Sep - 20 Oct | Turkish Airlines | direct |
Also check the deals for one-way flights from Istanbul to Islamabad in September.
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