This post may contain affiliate links. If you book or buy through our links, we may earn a small commission at no extra cost to you. Learn more.
Published · Updated
Seoul’s subway is genuinely one of the easiest metro systems in the world to use as a foreigner. Announcements in English, color-coded lines, and real-time platform displays make it hard to take a wrong turn. The parts that trip people up aren’t the trains themselves — they’re the small operational details nobody mentions until you’re standing at a gate with an empty card and a bag to check in two hours.
This guide skips the obvious and focuses on those details.
Get a T-Money Card First
Before anything else, you need a T-Money card. It’s a reloadable transit card that works on the subway, all city buses, and most taxis. Without one, you pay ₩100 more per trip and lose the transfer discount entirely — which adds up fast if you’re moving around the city.
You can pick one up at any CU, GS25, or 7-Eleven inside a subway station. The card itself costs ₩2,500 to ₩3,000 and comes with zero balance, so grab it and load some cash at the same counter. ₩10,000 is a reasonable starting point for a day of sightseeing.
To use the card, tap in at the entry gate, ride, and tap out at the exit. The system calculates the fare automatically based on distance. Don’t skip the tap-out — the gate will block you next time you try to enter.
How the Fare Works
Fares are distance-based and lower than most major metro systems globally.
| Distance | T-Money Fare | Cash Fare |
|---|---|---|
| Up to 10 km | ₩1,500 | ₩1,600 |
| 10–50 km | +₩100 per 5 km | +₩100 more |
| Over 50 km | +₩100 per 10 km | +₩100 more |
Most trips within central Seoul — Gangnam to Hongdae, Myeongdong to Itaewon — fall between ₩1,500 and ₩1,800. Children under 6 ride free. Ages 6–12 pay ₩750, teens pay ₩1,200, and adults pay the standard rate. Seniors 65 and over also ride free with a registered card.
The Transfer System Is What Makes It Cheap
This is the thing most first-time visitors don’t realize until their second day.
When you transfer from one subway line to another within 30 minutes, you don’t pay a new base fare. You only pay for the additional distance.
The T-Money card tracks it all automatically — just tap in and out at every gate as usual. In practice, a journey from Incheon Airport on the AREX all-stop train, transferring at Hongik University Station to Line 2 toward Gangnam, costs roughly ₩2,150 total. Without the discount, that would be two separate fares.
The discount window extends to 60 minutes between 21:00 and 07:00. You can transfer up to four times within one journey and still only pay for the distance, not the connections.
Planning a trip to Korea?
Check our guides on where to go, getting a SIM card, and K-ETA requirements before you fly.
Navigating Without Getting Lost
Open Google Maps or Naver Maps, search your destination, and tap the transit option. Either will show you the line to take, where to transfer, and — critically — which exit number to use when you arrive.
That last part matters more than it sounds. Major Seoul stations have anywhere from 8 to 15 numbered exits that can deposit you blocks apart. Gangnam Station alone has 12 exits. Take 10 seconds before you leave the train to confirm your number.
Station signs inside the paid zone are in Korean, English, Japanese, and Chinese. Platform announcements follow the same four-language cycle, with English right after Korean. If you’re unsure whether the train is heading the right direction, check the platform display — it shows the next few stations in sequence.
Lines Worth Knowing
Seoul has more than 20 subway and metro lines. Most visitors spend almost all their time on a handful.
| Line | Color | Where it goes |
|---|---|---|
| Line 2 | Green | Hongdae, Sinchon, City Hall, Gangnam, Jamsil — the main circular loop |
| Line 4 | Blue | Myeongdong, Seoul Station, Dongdaemun History Park |
| Line 3 | Orange | Gyeongbokgung, Anguk, Express Bus Terminal |
| Line 9 | Gold | Gimpo Airport, Yeouido, Express Bus Terminal, Bongeunsa |
| AREX | Red | Incheon Airport (T1 & T2) direct to Seoul Station |
| Bundang | Yellow | Suseo, Gangnam area connections |
Line 2 is the one you’ll use most. It’s the green circular line that loops through the city center and connects almost every neighborhood visitors care about.
A Few Things Nobody Tells You
Most platforms in central Seoul have full-length screen doors that align with the train doors. Stand behind the yellow line and wait — trying to position yourself precisely before the train arrives just puts you in the way.
Priority seats — usually pink or blue, at the ends of each car — are genuinely observed in Korea. Even if the seat is empty and the train is packed, locals won’t sit in them. Don’t either.
The last trains leave terminus stations around 23:30 to 00:10 depending on the line. If you’re out late, check your specific route’s last train time on the station board or in your map app before you leave wherever you are. Missing the last train isn’t catastrophic — taxis are available — but it’s an avoidable extra cost.
If you haven’t sorted out your airport transfer yet, the Incheon Airport to Seoul guide covers every transport option with current fares and travel times.
Fares as of 2026. Seoul Metropolitan Subway fares are subject to revision — confirm at any station ticket machine or the Seoul Metro website for the latest.
Get your T-money card sorted before arrival
- Klook T-money Card — pick up at Incheon Airport, skip the machine queue
Works on subway, bus, and convenience stores across Korea.
You might also like
Amy Kim is a Seoul-based writer covering Korean culture, food, and local experiences for international visitors. She focuses on the gap between what travelers expect from Korea and what actually makes the country interesting — the neighborhood spots, the apps everyone uses, the cultural norms that don’t appear in standard travel writing. She has spent years introducing friends visiting from abroad to a version of Seoul most tourists don’t reach.