Jeju is a medium to large sized city located on an island in South Korea. The city has high tourism ratings that often exceed 250 or more, but business ratings are much lower and fall in the low range of between 50 and 150.
The default airport here is Jeju International Airport (CJU).
Jeju does not have its own airport initially, but the high ratings will often attract players to build the airport here as many airlines favour this city as a tourist destination. This creates moderate competition in passenger operations, in which the city can sustain. Cargo operations usually have light competition, but the city will have problems trying to cope due to the low business ratings. Hence, players are advised to steer clear of cargo operations in the city as the low ratings also mean revenue from cargo operations will be limited. Jeju is rather well positioned in Asia and connections to cities within the continent (e.g. Seoul and Shenzhen) and Oceania (e.g. Sydney and Nadi) can be easily made. With the appropriate long ranged planes like the Airbus A330 and the Boeing 767 and/or stopovers (e.g. Honolulu, Kona or Dubai), players may also make flights to cities in Europe (e.g. Moscow and Athens) and North America (e.g. Los Angeles and Seattle).
Jeju International Airport is not available initially, so it can be built by the national government or by other players later in the game. Often, many players would build the airport here as soon as the opportunity arrives and demand for slots in the first few stages of the airport's development would be very strong. However, this is not recommended as demand for slots would slowly start to die off once the airport has achieved a status of a level 4 or 5 and the airport would not need to be upgraded any further. This makes it unworthy for 60 credits as players can spend less (40 credits for second airports and 30 for a third) at bigger cities and make more money than in Jeju. Hence, it is best to leave the airport's construction for the national government. In addition, the lack of demand for slots also makes second or third airports in the city unnecessary and, thus, building such airports should be avoided by airlines.
Due to the low business ratings, airlines should attempt to minimise the number of first and business class seats on their planes as such seats would unlikely attain a high occupancy rate. When flying to large cities for passenger operations, planes with a medium to large capacity with a high satisfaction is recommended. Examples include the Boeing 777, Airbus A340, McDonnell Douglas DC-10 and the Lockheed L-1011. Flights to small and medium sized cities should stick to using medium capacity planes like the Boeing 787, Airbus A300 and the Ilyushin IL-96. Small capacity passenger planes may be used, but it is best to avoid them unless flying to very small cities in order to minimise depreciation. For all cargo flights, use only small capacity planes such as the Boeing 737F, McDonnell Douglas DC-9-32F, and the Antonov AN-24. Avoid anything larger as the meagre profits from the cargo routes may not be enough to cover the high maintenance costs of the planes, thus increasing depreciation.