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

Return flights

22 May - 12 Jun	Ryanair
18 May - 08 Jun	Iberia
06 May - 15 May	Iberia
18 May - 01 Jun	Iberia
05 May - 18 May	Air Europa
07 May - 16 May	TAP
28 May - 13 Jun	Air Europa
31 May - 08 Jun	Scandinavian Airlines
23 May - 07 Jun	Iberia
08 May - 13 May	Iberia
29 May - 14 Jun	Iberia
20 May - 08 Jun	Iberia
31 May - 17 Jun	TAP
13 May - 27 May	Iberia
06 May - 20 May	Iberia
13 May - 24 May	Iberia
06 May - 13 May	Iberia
14 May - 28 May	TAP
11 May - 20 May	Ryanair
28 May - 10 Jun	Ryanair

Also check the deals for one-way flights from Lisbon to Seoul in May.

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 May from $741

Return flights