T-Money Card Guide in South Korea: what actually matters to know
Short answer
Purchase individual T-Money cards at airport convenience stores or machines, as they are the primary payment method for public transport nationwide. When traveling from Incheon to Busan, allow at least four hours between flight arrival and train departure to accommodate airport procedures and transit.
From real experience
For travelers arriving at Incheon Airport (ICN) with an immediate onward journey to Busan via KTX, timing is crucial.
A flight arriving at 11:35 might make catching the 14:28 KTX train challenging. It may be advisable to book a later train, such as the 15:45 service, to allow ample time for airport procedures, including purchasing T-Money cards (essential for children with specific tariffs) and potentially obtaining a Wowpass. KTX tickets can be purchased at user-friendly machines located at the airport.
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Public transportation in South Korea, including buses and subways nationwide (even on Jeju Island), is primarily paid for using T-Money cards.
Climate cards are restricted to the Seoul metropolitan area. Each passenger, including children aged 14 and 16, requires their own individual T-Money card. Cards can be purchased and topped up at airports or 24-hour convenience stores.
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T-money is the standard payment method for buses and subways in Seoul.
Payment for public transport cannot be made directly with international credit cards. T-money cards can be purchased and topped up with cash at convenience stores (GS25, etc.). For Wowpass users, funds must be transferred to the internal T-money balance.
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T-Money cards can be purchased and topped up at convenience stores like CU in Seoul's airports.
A 20,000 KRW top-up is suggested for initial travel. The standard T-Money card functions for metro fare payment.