Cheapest return flights from Seoul to Istanbul in April from $607

AirHint found the following cheapest return flights from Seoul (GMP) to Istanbul (IST) in April 2026 (see full year).

Return flights

14 Apr - 03 May Air China
03 Apr - 11 Apr China Southern
10 Apr - 18 Apr China Southern
08 Apr - 25 Apr China Southern
15 Apr - 25 Apr China Southern
08 Apr - 18 Apr China Southern
15 Apr - 18 Apr China Southern
20 Apr - 02 May China Southern
13 Apr - 18 Apr China Southern
25 Apr - 03 May Air China
20 Apr - 28 Apr China Southern
08 Apr - 14 Apr China Southern
10 Apr - 21 Apr China Southern
20 Apr - 12 May China Southern
10 Apr - 10 May China Southern
30 Apr - 10 May Air China
22 Apr - 12 May China Southern
24 Apr - 02 May China Southern
29 Apr - 05 May China Southern
29 Apr - 07 May China Southern

Also check the deals for one-way flights from Seoul to Istanbul in April.

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