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

Return flights

05 Dec - 12 Dec	Air France
08 Dec - 13 Jan	Air France
01 Dec - 08 Dec	Air France
10 Dec - 14 Jan	Air France
09 Dec - 30 Dec	Air France
01 Dec - 29 Dec	Air France
02 Dec - 29 Dec	Air France
29 Dec - 12 Jan	Air France
01 Dec - 08 Jan	United
14 Dec - 28 Jan	Air France
08 Dec - 08 Jan	United
24 Dec - 13 Jan	KLM
25 Dec - 13 Jan	Air Canada
27 Dec - 11 Jan	Air Canada
28 Dec - 11 Jan	Air Canada
02 Dec - 29 Dec	Korean Air	direct
19 Dec - 30 Dec	Air Canada
05 Dec - 12 Dec	Korean Air	direct
25 Dec - 31 Dec	United
24 Dec - 31 Dec	Air France

Also check the deals for one-way flights from Toronto to Seoul 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 Toronto to Seoul in December from 1037€

Return flights