If you prefer to take a bus to the centre of Seoul then go for the limousine bus. There are two types of limousine bus: deluxe (14,000-15,000KRW) and standard (9,000-10,000KRW). Passengers can buy tickets for the bus outside the Passengers Terminal (Arrival Area) on Level 1. Although it takes far longer to reach the city by bus, the advantage is that they make multiple stops, including to most of the major hotels. They are also comfortable, clean, air conditioned and frequent.
Alternatively you could take a taxi driectly to your hotel. There are two types of taxi: regular (ilban and deluxe (mobeom. Regular taxis' base rate is 2,400KRW for the first 2km with 100KRW for every 144m thereafter, while deluxe taxis charge 4,500 for the first 3km and 200KRW for every 164 thereafter. The deluxe cabs are more spacious and comfortable and the drivers are meant to speak English.
For flights to and from Asia you will be passing throgh either Gimpo International Airport in Seoul or Gimhae International Airport in Busan.
As far as getting around the country is concerned, the only place where getting a domestic flight is necessary is for Jeju Island. There are many flights each day from various major cities to the Special Autonomous Province off the southwest coast of the country. For all other destinations, while there are domestic flights available, it is cheaper and probably quicker to take the train.
The KORAIL network is pretty extensive and covers most parts of the country. The fastest way to get to Busan (three hours), Gwangju (two and a half hours) or Mokpo (three hours) from Seoul is by KTX. This bullet train travels at almost 200mph and is spacious, comfortable and efficient (and not necessarily expensive). For other major cities you have the Saemaeul train, while for everywhere else you can take the Mugungwha train (more frequent stops than the Saemaeul or the Tongil (stops at every station). If you plan to travel a lot by train it is worth getting the Korail pass which allows you unlimited travel for a defined amount of time. You can find out more about the pass here: http://www.korail.com/2009/htm/htm41000/w_htm41120.jsp.
The cheapest way to get between towns and cities remains the bus, of which there are a couple of types: express (gosok) and intercity (sioe. You will be able to get a bus to pretty much anywhere you wish to go although for the smaller destinations the frequency will not be very high. Bus stations can also be confusing places to it helps to have the name of your destination written down in Korean. The express buses high the highways and do not make stops unless it is for a break on a long journey. The intercity buses use regular roads and make stops along the way to its final destination. Some cities have separate express and intercity bus stations so make sure you know which bus you need and where to catch it!
Within major cities (Seoul, Busan, Daegu, Daejoen and Gwangju) the best way to get around is by subway. Spacious, rapid, air conditioned and relatively cheap, they are probably the quickest means of transport too. All indications are in both Korean and English and stops are numbered which makes it much easier. Nonetheless, it can be a little confusing so be patient. In Seoul, when buying a one-way fare, the price will include a 500KRW deposit which you get back when you return your card.
City buses are very cheap but can get caught up in traffic jams in the major cities.
Taxis are also pretty good value. Ilban taxis and coloured silver, white or orange while mobeom taxis are black.
Korea Tourist Office
London Office, 3rd Floor, New Zealand House Haymarket, London SW1Y 4TE. Tel: (44 20) 7321 2535.
Korea Cultural Centre
Ground Floor, Grand Buildings, 1-3 Strand, London WC2N 5EJ. Tel: (44 20) 7004 2600.
60 Buckingham Gate, SW1E 6AJ London. Tel: (44 20) 7227 5500.
Taepyeongno 40, 4 Jeong-dong, Jung-gu, Seoul 100-120. Tel: (82 2) 3210 5500.
Korean National Tourism Corporation (KNTC), KNTC Building, 1O, Ta-dong, Chung-gu, in Seoul. Tel: (82-2) 729 9498.
http://sca.visitseoul.net is a new website in English. It has various photos and videos of the town's cultural sites (national treasures, historical sites, etc). For all information, contact the tourist department of the Seoul Town Hall. Tel: (82 2) 3707 9547