AirHint found the following cheapest one-way flights from Seoul (GMP) to Istanbul (IST) in April 2026 (see full year).
One-Way flights
| 19 Apr | Korean Air | ||
| 02 Apr | Korean Air | ||
| 15 Apr | Jeju Air | ||
| 08 Apr | Jeju Air | ||
| 09 Apr | Jeju Air | ||
| 13 Apr | Jeju Air | ||
| 01 Apr | Jeju Air | ||
| 14 Apr | Korean Air | ||
| 12 Apr | Jeju Air | ||
| 10 Apr | Korean Air |
Also check the deals for return flights from Seoul to Istanbul in April.
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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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