AirHint found the following cheapest return flights from Seoul (GMP) to Warsaw (WAW) in September 2025 (see full year).

Return flights

04 Sep - 10 Sep	Air China
17 Sep - 24 Sep	Air China
07 Sep - 11 Sep	Air China
10 Sep - 17 Sep	Air China
08 Sep - 23 Sep	Air China
06 Sep - 14 Sep	Japan Airlines
29 Sep - 06 Oct	Japan Airlines
25 Sep - 30 Sep	Japan Airlines
24 Sep - 09 Oct	Japan Airlines
22 Sep - 02 Oct	Japan Airlines
20 Sep - 28 Sep	Japan Airlines
27 Sep - 09 Oct	Japan Airlines
28 Sep - 05 Oct	Japan Airlines
30 Sep - 06 Oct	Air China
19 Sep - 30 Sep	Japan Airlines
11 Sep - 18 Sep	Japan Airlines

Also check the deals for one-way flights from Seoul to Warsaw in September.

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 Warsaw in September from 656€

Return flights