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

Return flights

01 Apr - 09 Apr	Air France
01 Apr - 08 Apr	Air France
01 Apr - 15 Apr	Air France
03 Apr - 07 Apr	Air France
03 Apr - 13 Apr	Air France
06 Apr - 14 Apr	Lufthansa
21 Apr - 28 Apr	LOT
22 Apr - 27 Apr	LOT
08 Apr - 15 Apr	LOT
08 Apr - 29 Apr	LOT
28 Apr - 31 May	LOT
28 Apr - 30 May	LOT
29 Apr - 19 May	LOT
29 Apr - 20 May	LOT
29 Apr - 31 May	LOT
27 Apr - 05 May	LOT
26 Apr - 17 May	LOT
22 Apr - 03 May	LOT
27 Apr - 03 May	LOT
01 Apr - 01 May	LOT

Also check the deals for one-way flights from Seoul to Lisbon 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 Seoul to Lisbon in April from $712

Return flights