AirHint found the following cheapest return flights from Guernsey (GCI) to Istanbul (IST) in May 2026 (see full year).
Return flights
| 14 May - 18 May | Aurigny | ||
| 13 May - 18 May | Aurigny | ||
| 25 May - 29 May | Aurigny |
Also check the deals for one-way flights from Guernsey to Istanbul in May.
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