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

Return flights

30 Apr - 15 May	Iberia
20 Apr - 27 Apr	Iberia
27 Apr - 04 May	Iberia
21 Apr - 19 May	Iberia
26 Apr - 06 May	Etihad Airways
15 Apr - 22 Apr	Finnair
08 Apr - 30 Apr	Finnair
08 Apr - 15 Apr	Finnair
02 Apr - 12 Apr	Finnair
01 Apr - 12 Apr	Finnair
02 Apr - 11 Apr	Finnair
05 Apr - 15 Apr	Finnair
03 Apr - 12 Apr	Finnair
26 Apr - 10 May	Finnair
18 Apr - 02 May	Turkish Airlines
19 Apr - 03 May	Turkish Airlines
25 Apr - 09 May	Turkish Airlines
01 Apr - 12 Apr	Korean Air	direct
26 Apr - 10 May	Korean Air	direct
19 Apr - 03 May	Korean Air	direct

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 $720

Return flights