Cheapest return flights from Seoul to Osaka in September from $127

Best time to book flights for Seoul (GMP) to Osaka (KIX) flights at AirHint

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

Return flights

17 Sep - 24 Sep Jeju Air direct
02 Sep - 03 Sep Jeju Air direct
14 Sep - 24 Sep Jeju Air direct
24 Sep - 29 Sep Jeju Air direct
01 Sep - 29 Sep Jeju Air direct
10 Sep - 11 Sep Jeju Air direct
08 Sep - 11 Sep Jeju Air direct
22 Sep - 24 Sep Jeju Air direct
11 Sep - 15 Sep Jeju Air direct
02 Sep - 09 Sep Jeju Air direct
30 Sep - 01 Oct Jeju Air direct
28 Sep - 01 Oct Jeju Air direct
29 Sep - 02 Oct Jeju Air direct
29 Sep - 03 Oct Jeju Air direct
28 Sep - 03 Oct Jeju Air direct
27 Sep - 02 Oct Asiana Airlines direct
24 Sep - 29 Oct Asiana Airlines direct
29 Sep - 04 Oct Asiana Airlines direct
27 Sep - 04 Oct Asiana Airlines direct
30 Sep - 04 Oct Asiana Airlines direct

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

Skyscanner

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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