Korean Air has outlined its plans for the upcoming summer schedule, which begins on 30 March.
The carrier says it will operate a daily Seoul Incheon-Houston service, instead of four times weekly as planned, when it begins this service on 2 May.
The airline will add a weekly service on the Seoul Incheon-Amsterdam and Seoul Incheon-Istanbul services, raising the Amsterdam frequency to four times weekly and Istanbul to five times weekly.
Its Seoul Incheon-Los Angeles-Sao Paolo service will go up from thrice weekly to five times weekly. The overall frequency on the Seoul Incheon-Los Angeles route will also increase to 19 times a week.
The Seoul Incheon-Jakarta service will increase to 10 times weekly, and on the Seoul Incheon-Hanoi to 11 times weekly. It now operates daily services to the two cities.
In early June, the Seoul Incheon-Vienna-Zurich will be split into thrice weekly Seoul Incheon-Vienna and Seoul Incheon-Zurich services.
From 25 May, the airline plans to raise capacity on the Seoul Incheon-New York JFK service. It will deploy a second daily Airbus A380 frequency on the route, replacing the Boeing 777-300ER currently operated.
Korean Air will also cancel one of its services and reduce frequencies on three other routes, starting 30 March
The carrier will end the Seoul Incheon-Shizuoka service, now operated thrice weekly.
Its five times daily Seoul Incheon-Tokyo Narita service will be cut to thrice daily, except during the selected periods in April, May, July and August. The Seoul Incheon-Dallas service will also be cut from daily to five times weekly.
Frequency on the Seoul Incheon-Atlanta will be cut from 10 to seven times weekly. However, from 2 July it will begin deploying the A380 to Atlanta on a thrice weekly basis, before raising it to daily from 1 September, the airline adds.