If you've mastered the basic Seoul subway lines and you're feeling confident β congratulations. Now let me introduce you to the rest of Seoul's transit network: metropolitan railways that extend into the suburbs, a brand new ultra-fast express system, and a collection of smaller light rail lines serving specific neighbourhoods.
The good news: T-money works on almost all of them. The less good news: fare structures vary, and some lines charge significantly more than the standard subway fare.
As a tourist, you'll most likely use the Sinbundang Line (for Gangnam β Pangyo β Suwon) and possibly the Gyeongui-Jungang Line (for Hongdae, DMZ direction). The GTX is new and mostly useful for commuters. Light rail lines serve specific neighbourhoods you may or may not visit.
The Sinbundang Line β the expensive red one
The Sinbundang Line is a privately operated express railway running from Gangnam south to the Pangyo tech hub and beyond toward Suwon. It's fast, clean, and modern β but it charges an additional fare on top of the standard subway fare. Expect to pay β©900β2,000 extra depending on distance.
- Marked in dark red/crimson on transit maps
- T-money accepted β extra fare deducted automatically
- Great for reaching Pangyo (Korea's Silicon Valley)
- Runs very frequently β every 3-5 minutes at peak times
The Suinbundang Line β the orange suburban line
A long suburban line connecting Incheon and Suwon via the Bundang new town area and into eastern Seoul. Standard subway fares apply β no extra charge. Useful if you're visiting Suwon Hwaseong Fortress or the Bundang area.
The Gyeongui-Jungang Line β great for tourists
A metropolitan railway running east-west through central Seoul. Stops at Hongdae (Hongik University area), Seoul Station, and heads west toward the DMZ direction (Imjingang) or east toward the countryside. Standard fares apply.
- Hongdae Station β connects to subway Lines 2, 6, AREX
- Goes to Neunggok/Imjingang β useful for DMZ tours
- Less crowded than main subway lines
GTX β Korea's new ultra-fast express
Korea's newest express railway system, running deep underground at speeds up to 180km/h. GTX-A opened in 2024 and dramatically cuts travel times across the Seoul metropolitan area. GTX-B and GTX-C are under construction. Charges a significant extra fare on top of base subway fare.
- GTX-A: Susaek β Yeonsinnae β Seoul Station β Samseong (Gangnam) β Dongtan
- Journey time: Susaek to Samseong in about 20 minutes (vs 1+ hour on subway)
- Extra fare: approximately β©2,800β4,200 additional
- Mostly useful for commuters living in outer suburbs
Light rail lines β the neighbourhood connectors
Seoul and surrounding cities have several smaller light rail lines serving specific areas. These are narrower, automated trains running shorter routes. T-money works on all of them with standard fares.
Quick reference: which line for which destination?
| Destination | Best line | Extra fare? |
|---|---|---|
| Pangyo (tech hub) | Sinbundang Line (red) | Yes β©900+ |
| Suwon Hwaseong | Suinbundang Line (yellow) | No |
| Everland theme park | Yongin Everline | No |
| Bukhansan hiking | Ui-Sinseol Line | No |
| DMZ / Imjingang | Gyeongui-Jungang Line | No |
| Gimpo Airport (domestic) | AREX or Gimpo Goldline | No |
| Gangnam fast | GTX-A (Samseong) | Yes β©2,800+ |
Lines with extra fares (Sinbundang, GTX) will show the total charge on the ticket gate screen before you tap in. If the fare looks unusually high, double-check you're on the right line. T-money will be charged automatically β make sure you have enough balance.
Naver Maps knows every single line including light rail and GTX. Enter your destination and it will automatically route you through the optimal combination of lines, showing exact fares and transfer points. Always use it β don't try to plan these routes manually.
Ready to explore beyond Seoul?
Once you're comfortable with T-money and the basic subway, Seoul's extended transit network opens up a huge range of day trips and experiences β Suwon's fortress, Everland, the DMZ area, and the tech hubs of Pangyo and Bundang, all accessible by train.
Need the basics first? Read our Seoul Subway Survival Guide β tickets, transfers, and the most common mistakes foreigners make.