This report provides a detailed analysis of the flight route between Bandaranaike International Airport (BIA) in Sri Lanka and Incheon International Airport (ICN) in South Korea. It begins with an introduction to both airports, including their geographical locations, available runways, and other facilities such as terminals and services. The report then explores possible flight routes between the two airports, considering direct and one/two-stopover options, along with overflying countries. It also covers immigration regulations for both airports, including entry, transit, and departure requirements for scheduled aircrafts. Further sections analyze the security status of the destination airport and overflying countries, potential airport closures, and alternative airports available. The report also includes en-route and destination weather conditions, along with details about the airport operators and ground handling companies at both departure and arrival airports. Finally, it provides information on other airlines operating on the route, offering a comprehensive overview for aviation professionals and students.