To better accommodate the needs of foreign
tourists visiting Korea, M-PASS, a public transit card exclusively for foreign
tourists, is now available for purchase.
M-PASS, short for Metropolitan Pass, is good for up to 20 rides per day of any subway lines in the Seoul metropolitan area (e.g. Seoul Subway Lines 1~9, Incheon Metro, Airport Metro Commuter (except Express)). The card comes in 5 types – one-day, two-day, three-day, five-day and seven-day passes. The one-day pass costs 10,000 won.
You may purchase M-PASS at I-Tour Seoul (Seoul Tourist Information Center) located in the Incheon International Airport Arrivals Terminal. On purchase, a 5,000 won deposit is required, which is refundable with a 500 won fee deducted upon returning the card at wherever you purchased it or at any GS convenience store.
Courtesy of: Korea Smart Card