Originally Posted by zyxlsy

Assume you were talking about ICN, first, I think 10:30 is not that late in Seoul. For getting into the city, just take the regular one (non-black), which offer you a reasonable price.

Secondly, I never took flights in the AM at ICN. Are you talking about 2AM or 10AM? With my afternoon experience, driving to ICN from city center takes 1.5 hours max, passing immigration and customs takes 30 minutes. If you take non-Korean airlines, I think you always need to take the train and head to the outer terminal, which adds about another 20 minutes. Leave 30 minutes for boarding, as in Korea people get their duty free after security, so it could be crowded on board and their might be some fighting for the luggage spaces.

Your AM experience might be different.

Also, getting your tax return forms stamped (just stamped, you need another half an hour to submit the forms after security and immigration) might take a while before security. Mine last time took AN HOUR!

Hope this helps.