Quick Update on Korean A(ir):
Link to airlineBasesICN/RKSI Incheon International (45 flights)
GMP/RKSS Gimpo International (9 flights)
CJU/RKPC Jeju International (14 flights)
PUS/RKPK Gimhae (Busan) International (13 flights)
(KIX/RJBB Osaka - Kansai International has 4 flights as well - not yet an base in game)
Daily Pax: 26,371
Fleet1x Airbus A330-200 (+1 on order), 5x Boeing 737-700, 2x Boeing 737-800, 5x Boeing 737-900
RoutesDomestic (within Korea):

This includes a daily "charter" to N. Korean (shown in orange).
Short and Medium Haul (Japan, North and Eastern China, Russia):

Short and Medium Haul (Southeastern China, Vietnam):

Long Haul (England and UAE):

A few FAQs:
- The most common destination outside of our bases is China's Beijing Capital International with 4 flights daily. This represents 6.53% of Beijing Capital's traffic. Cheng Je, Nagoya - Central Japan International, Tokyo Narita International, and Ulsan Airport are all served 3x daily.
- Korean Air operates 76 routes across 50 destinations.
- The airspace between Incheon International and Jeju International is most frequently traveled, twice daily with the 739.