Korean Air plans to increase the frequency of flights on two of its routes.
On 15 September, the carrier will increase its daily Seoul Incheon-Okayama route to nine times weekly, says the airline's spokeswoman.
On 28 October, it will also increase its Seoul Incheon-Manila route from twice to thrice daily.
Korean Air operates Boeing 737-900s on services to Okayama, and 737-800s and -900s on services to Manila.
Schedules in Innovata show that the airline is the only operator on the Seoul Incheon-Okayama route. It competes with carriers such as Asiana Airlines and Philippine Airlines on the Seoul Incheon-Manila route.