AirHint found the following cheapest return flights from Cologne (CGN) to Seoul (ICN) in April 2026 (see full year).

Return flights

05 Apr - 20 Apr	Wizz Air
06 Apr - 20 Apr	Ryanair
15 Apr - 22 Apr	Ryanair
16 Apr - 07 May	Ryanair
17 Apr - 01 May	Ryanair
01 Apr - 29 Apr	Wizz Air
18 Apr - 23 May	Ryanair
01 Apr - 08 Apr	Pegasus Airlines
01 Apr - 05 Apr	Pegasus Airlines
05 Apr - 21 Apr	Turkish Airlines
02 Apr - 29 Apr	Turkish Airlines
01 Apr - 27 Apr	Turkish Airlines
01 Apr - 28 Apr	Turkish Airlines
03 Apr - 01 May	Turkish Airlines

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

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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Cheapest return flights from Cologne to Seoul in April from $835

Return flights