How to Actually Ride the Seoul Subway

The Seoul subway is one of the easier things about visiting — it's cheap, well-signed in English, dense, and runs until around midnight. But a few things trip people up the first time, so here's just those. The app side (Naver Map) and the cash-and-topping-up side live in other guides; this is what you need standing at the gate.

1. Pick one of three ways to pay

• A T-money card (the answer for most people). Buy a physical card at a convenience store or station, top it up with cash, tap once for subway, bus, and taxis. Buying and charging it: see the 3 apps you need and do you need cash in Seoul.
• A Climate Card tourist pass (if you ride a lot). Unlimited subway and city buses: roughly ₩5,000 for 1 day, ₩8,000 for 2, ₩10,000 for 3, ₩15,000 for 5, ₩20,000 for 7 (2026 figures — confirm), plus a one-time ₩3,000 for the physical card. It pays off at about four rides a day. But it's Seoul only — it excludes outer Gyeonggi routes, airport buses, red express buses, the Ttareungi bikes, and the Han River bus. A day trip to Suwon or Chuncheon means paying for that leg separately.
• A single-journey ticket. At the station machine, choose your destination, insert ₩2,150 (₩1,650 fare + ₩500 deposit). After you exit, put the card into a "deposit refund" machine in the station for your ₩500 back. No transfer discount. Not worth it unless you're only riding once or twice.
• Note: since March 2026, kiosks at major stations take foreign credit/debit cards (Visa, Mastercard, UnionPay) for single tickets and T-money top-ups. The AREX airport line's Express (direct) train does not take T-money or Climate Card — you buy a separate ticket — but the All-Stop train does.

2. Fares are distance-based

The base fare is ₩1,550 by card (₩1,650 for a single ticket), with small increments every 5km past the first 10km. Most trips inside Seoul are the base fare or ₩100–300 over. You must tap out on exit for it to calculate correctly — skip it and you'll get a penalty on the next trip.

3. The transfer discount — this is the point

If you transfer subway-to-bus, bus-to-bus, or bus-to-subway on the same card, you're not charged twice — the distance just continues. Conditions: within 30 minutes of tapping out (1 hour between 9pm and 7am), up to four times a day. Cash and single tickets don't get this. It's the reason to use a physical card or a Climate Card.

4. Reading the map and the exits

• Lines are colour + number (Line 2 green, Line 3 orange). Stations have numbers too (Hongik Univ. is 239). Naver Map will tell you "Line 3, second stop, transfer to Line 4 at 328."
• Exit numbers really matter. Big stations have exits numbered up to 14, and coming out the wrong side can mean a 10-minute detour at street level. Check which exit number your destination is, and follow the exit signs from the platform.
• Transfers are signed by line colour inside the station, but a few (Express Bus Terminal, Jongno 3-ga, Wangsimni) have long transfer corridors — budget 5–8 minutes of walking.

5. Some lines have express trains

Line 9, parts of Line 1, the Suin-Bundang line, and the Gyeongui-Jungang line run express trains that stop only at some stations — if your stop isn't an express stop, it blows right past it. Check the platform display and the floor markings (express / local). The Line 9 express is especially crowded.

6. Rush hour and etiquette

• Weekday mornings 8–9 and evenings 6–7:30 are genuinely packed; Lines 2 and 9 are the worst. Avoid if you can, and never board those with a suitcase at that hour.
• The priority seats at the ends of each car stay empty even when the train is full — it's the custom not to sit there.
• Keep calls short, no speakerphone or video sound, backpack on your front or down by your feet.
• Let people off before you get on. If you're by the door, step out at each stop to let others pass.

A Note From Daniel — our real human editor

Beyond the priority seats at the ends of the car, you'll sometimes see seats marked in pink, usually mid-car. Those are kept empty for pregnant passengers — not occupied-if-free, empty, even on a packed train. Visitors sit in them without realising and get some odd looks. Treat the pink seat the way you'd treat the priority seats: leave it.

Soo's Tip

The single mistake I'd most like to save you from: coming out the wrong exit at a big station. Before you leave the platform, look at Naver Map for the exit number, then follow that number's signs — not just the "Exit" sign. At somewhere like Gangnam or Jamsil, exits 1 and 11 can be a full block and a road crossing apart, and there's no quick way to fix it once you're up top.