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

Return flights

14 Sep - 21 Sep	Air China
04 Sep - 18 Sep	Air China
18 Sep - 22 Sep	Air China
11 Sep - 22 Sep	Air China
20 Sep - 25 Sep	Air China
07 Sep - 19 Sep	Air China
03 Sep - 11 Sep	Air China
10 Sep - 26 Sep	Air China
04 Sep - 12 Sep	Air China
11 Sep - 15 Sep	Air China
30 Sep - 06 Oct	Korean Air
24 Sep - 01 Oct	Japan Airlines
26 Sep - 05 Oct	Japan Airlines
08 Sep - 13 Oct	Japan Airlines
25 Sep - 03 Oct	Japan Airlines
25 Sep - 07 Oct	Japan Airlines
25 Sep - 06 Oct	Japan Airlines
24 Sep - 06 Oct	Japan Airlines
28 Sep - 05 Oct	Air China
07 Sep - 12 Oct	Air China

Also check the deals for one-way flights from Seoul to Budapest 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 Budapest in September from 513€

Return flights