AREX (or the airport train) started its operations in 2007. It has been transporting passengers from Incheon Airport to Gimpo Airport. On December 29th last year, the line to Seoul Station (in downtown Seoul) was opened.
When my husband told me that he’ll be traveling again this year, I immediately thought about the AREX. My son and I once took it almost two years ago and I’d like to try it again ;p
AREX is much more convenient, especially now that it’s servicing Seoul Station, than taking a car to and from the airport. At least, we won’t have to pay for toll and spend money on gas anymore – and roadside assistance!
There are two kinds of train servicing this line: Commuter and Express. The latter is a nonstop ride from Incheon Airport to Seoul Station and vice versa. It is also more expensive at 13,300 won. The commuter train ride is only 3,700 won but it stops six times and is about 10 minutes longer.
You can get more information about the Airport Train or AREX from their English website.