AirHint found the following cheapest return flights from Seoul (ICN) to Islamabad (ISB) in December 2025 (see full year).

Return flights

03 Dec - 07 Dec	China Southern
31 Dec - 29 Jan	China Southern
31 Dec - 27 Jan	China Southern
10 Dec - 23 Dec	China Southern
29 Dec - 27 Jan	China Southern
27 Dec - 25 Jan	China Southern
07 Dec - 23 Dec	China Southern
25 Dec - 22 Jan	China Southern
25 Dec - 31 Dec	Thai Airways
19 Dec - 02 Jan	Thai Airways
19 Dec - 03 Jan	Thai Airways
18 Dec - 03 Jan	Thai Airways
26 Dec - 31 Dec	Thai Airways
20 Dec - 03 Jan	Thai Airways
12 Dec - 01 Jan	Asiana Airlines

Also check the deals for one-way flights from Seoul to Islamabad in December.

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 Islamabad in December from $684

Return flights