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

Return flights

22 Apr - 09 May	Finnair
15 Apr - 29 Apr	Finnair
14 Apr - 21 Apr	Finnair
15 Apr - 01 May	Finnair
19 Apr - 29 Apr	LOT
19 Apr - 06 May	Finnair
09 Apr - 17 Apr	Finnair
22 Apr - 26 Apr	Finnair
25 Apr - 06 May	Etihad Airways
10 Apr - 17 Apr	Finnair
08 Apr - 15 Apr	Finnair
24 Apr - 09 May	SWISS
09 Apr - 19 Apr	Finnair
15 Apr - 22 Apr	Finnair
12 Apr - 22 Apr	Turkish Airlines
17 Apr - 03 May	Turkish Airlines
22 Apr - 03 May	Turkish Airlines
19 Apr - 03 May	Turkish Airlines
18 Apr - 02 May	Turkish Airlines

Also check the deals for one-way flights from Lisbon 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 Lisbon to Seoul in April from $823

Return flights