I want to go back to Incheon from Seoul Station. When I came here, I used a bus from Incheon to Gangnam Station, but now I want to use AREX Express to return to the airport.
Can I purchase the express ticket using my T-Money? It is the direct express line, not the all-stop train, which you can get on using T-Money.
Alternatively, if T-Money is not available, can I still buy the ticket using a credit card (Amex)?