Airlines operating US-South Korea routes in December

Korean Air has the most extensive network to the U.S., operating 434 flights in December 2024. The airline uses various aircraft including Airbus A380s and Boeing 747-8s on routes to multiple U.S. cities.

Asiana Airlines, the second-largest carrier on this route, operates five different routes totaling 190 flights with aircraft like the Boeing 777-200LR and Airbus A380.

Delta Air Lines provides significant service with 155 flights from hubs including Atlanta, Detroit, Minneapolis/Saint Paul, and Seattle using Airbus A350-900s and A330neos.

Hawaiian Airlines runs 22 flights each way between ICN and Honolulu's Daniel K. Inouye International Airport (HNL) with Airbus A330-200s.

Low-cost carriers Jeju Air, Jin Air, and T'way Air operate numerous flights to Guam and Saipan from South Korea. Jeju Air flies from Busan's Gimhae International Airport (PUS) while Jin Air connects both Seoul Incheon and Busan with Guam using Boeing 737-800s. T'way Air serves these routes daily with its Boeing 737 MAX 8 fleet.

In total, there are approximately 1,190 flights scheduled between the U.S. and South Korea in December 2024 across all carriers mentioned above.