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Seoul Subway Guide for First-Timers: Lines, Transfers and Etiquette

Short answer: the Seoul subway is clean, safe and easy once you know three things: lines are identified by number and color, every station has a number and English name, and you pay by tapping a transport card (T-money or a tourist pass) at the gate when you enter and again when you leave. Use Naver Map or Kakao Map for routes, follow the colored signs for transfers, and for etiquette, stay quiet on the train and leave priority seats free.

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How the network is organized

Greater Seoul's subway includes Lines 1 to 9 plus several named lines such as the Shinbundang Line, Suin-Bundang Line, Gyeongui-Jungang Line, the Airport Railroad (AREX) and the GTX-A express. Each line has its own color, which is used on maps, signs and the stripes on the floor that lead you to platforms.

Station numbers

Every station has a three-digit number that starts with its line number. For example, numbers in the 200s belong to Line 2, the big green circle line that loops through Gangnam, Hongik Univ. and City Hall. Station names are announced in Korean and English (and often Chinese and Japanese), and signs show all of them, so you never need to read Hangul to get around.

Direction

Platforms are signed by the next station and the final destination of the train. Before you go through the gate, check that the direction sign shows the stations you are heading toward; at some stations the two directions have separate entrances, and you would need to exit and pay again if you pick the wrong one. On Line 2, trains are described as "inner circle" (clockwise) and "outer circle" (counterclockwise).

Express trains

Line 9 and some other lines run both local and express trains. Express trains skip stations, so check that your stop is served. The board and the app will tell you which type is arriving.

Paying: T-money, tourist passes and cards

The easiest option for most visitors is a T-money card, sold at convenience stores and station machines and topped up with cash. Tap it on the reader as you enter and as you leave; the fare is calculated by distance, and you get transfer discounts between subway and bus within a short time window. Our T-money card guide walks through buying and recharging step by step.

Seoul also sells a short-term Climate Card tourist pass with unlimited rides for a set number of days on Seoul subway and buses. It does not cover everything (the AREX airport train and intercity buses are excluded, for example), so check the official Seoul transit pages for the current coverage and prices before relying on it. In 2026 many station machines on Lines 1–8 also began accepting foreign Visa and Mastercard for single tickets and short-term passes.

Single-journey tickets exist too, but they need a refundable deposit that you get back at a machine after the ride, which is a hassle if you ride often.

Transfers without stress

  • Follow the color. Inside a transfer station, look for the sign with the color and number of your next line and follow floor stripes in that color.
  • Allow time at big hubs. Stations like Seoul Station, Express Bus Terminal, Gimpo Airport and Jongno 3-ga can involve long walks and many stairs. Five to ten minutes is normal.
  • Use the fast-transfer hints. Naver Map and Kakao Map often show which car and door is closest to the transfer or exit. It saves a lot of walking.
  • Exits are numbered. Big stations can have a dozen or more exits. Directions and maps always refer to exit numbers, so note yours before you go up.

Not sure which map app to install? See Naver Map vs Kakao Map. Google Maps works for transit routes but is weaker for walking directions in Korea.

Subway etiquette

  • Priority seats. Seats at the ends of each car are for older people, people with disabilities, pregnant passengers and parents with small children. Leave them empty even when the train is crowded.
  • Pink seats in the middle of some cars are reserved for pregnant women.
  • Quiet please. Talking softly is fine; loud phone calls, video without earphones or eating full meals are frowned upon.
  • Let people off first, and line up at the marked spots beside the doors.
  • Backpacks: on crowded trains, take your bag off and hold it in front of you or put it on the rack.
  • Escalators: people often stand on the right and walk on the left, though official campaigns ask everyone to stand still for safety.

Rush hour, last trains and other practical stuff

Weekday rush hours (roughly early morning and early evening) are very crowded, especially on Line 2 and Line 9. If you can, plan sightseeing outside those windows. Trains generally run from early morning until around midnight, and the last-train time varies by station and direction, so check the app or the timetable posted on the platform. After the subway stops, late-night "N" buses and taxis are your options.

Stations have free, clean restrooms, and most have elevators, though finding the elevator exit can take a minute. Many stations also have coin lockers for bags. Free public Wi-Fi is available on trains and in stations, but a data plan makes navigation much smoother.

From the airport

From Incheon Airport, the AREX train connects to Seoul Station, Hongik Univ. and other stations where you can switch to the city subway. The nonstop express train needs a separate ticket, such as this AREX express ticket, while the all-stop train accepts T-money. Setting up mobile data before you land, for example with a Korea unlimited data SIM, means your map app works from the first platform.

LUMI's POPORO CITY rule of thumb: "Know your exit number before you know your lunch plans."

Quick tips

  • Search station names in English in Naver Map or Kakao Map; both show real-time arrivals.
  • Always tap out at the exit gate, or you may be charged extra next time.
  • Keep a small cash buffer on T-money; you cannot exit with a negative balance.
  • Check the direction sign before going through the gate.
  • Avoid big hubs at rush hour with large luggage.

FAQ

Can I use a credit card to ride the Seoul subway?

Foreign cards generally cannot be tapped directly at the gates, but many station machines now accept foreign Visa and Mastercard to buy tickets and short-term passes. A T-money card is still the simplest option.

Is the Seoul subway safe at night?

Yes, it is widely considered very safe, with CCTV, staff and emergency call buttons. Normal care with your belongings is enough.

Is Google Maps enough for the subway?

It shows subway routes, but Naver Map and Kakao Map are more accurate, show the best car for transfers and give better walking directions.

What if I go through the wrong gate?

Talk to staff at the station office or use the help button at the gate. Staff are used to helping visitors, and many stations have English signage for help.

Do children ride free?

Young children usually ride free with an adult, and older children and teens pay reduced fares with a registered child or youth card. Check the official fare rules for current age limits.