AirHint found the following cheapest return flights from Seoul (GMP) to Lisbon (LIS) in July 2025 (see full year).

Return flights

04 Jul - 13 Jul	Air China
22 Jul - 31 Jul	Air Seoul, Inc
23 Jul - 27 Jul	China Southern
23 Jul - 01 Aug	Asiana Airlines
20 Jul - 26 Jul	Japan Airlines
25 Jul - 04 Aug	Japan Airlines
25 Jul - 12 Aug	Japan Airlines
25 Jul - 01 Aug	Japan Airlines
25 Jul - 31 Jul	Japan Airlines
25 Jul - 05 Aug	Japan Airlines
18 Jul - 27 Jul	Japan Airlines
18 Jul - 25 Jul	Japan Airlines
16 Jul - 21 Jul	Japan Airlines
12 Jul - 25 Jul	Japan Airlines
12 Jul - 20 Jul	Japan Airlines
26 Jul - 11 Aug	Japan Airlines
26 Jul - 06 Aug	Japan Airlines
26 Jul - 13 Aug	Japan Airlines
23 Jul - 06 Aug	Japan Airlines
25 Jul - 03 Aug	Japan Airlines

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

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 July from $1218

Return flights