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Why the Seoul Subway Is Actually Amazing

I've ridden metros in Tokyo, London, New York, and Paris. Seoul's subway beats them all for sheer practicality. It's clean, punctual, air-conditioned year-round, and covers virtually every corner of the city. There are 23 lines, over 700 stations, and the whole network runs like clockwork.

The catch? Your first time staring at the map can feel like decoding a circuit board. Don't panic. After reading this guide, you'll be navigating like someone who's lived here for years.

Buying Tickets: Single Journey vs T-money Card

Single Journey Ticket

You can buy a single journey ticket at any ticketing machine inside any station. Here's how the pricing works:

  • Base fare: ₩1,500 (~$1.10 USD) for trips up to 10km
  • Extended: ₩1,700 (~$1.25 USD) for trips 10-50km
  • Deposit: ₩500 (~$0.35 USD) refundable at the machine when you exit

To get your deposit back, insert your card into the "Deposit Refund" slot at any ticketing machine before leaving the station. Many tourists forget this step and leave ₩500 on the table every single ride.

Single journey tickets are fine for one or two rides, but if you're staying more than a day, get a T-money card immediately.

T-money Card (What Locals Use)

The T-money card is a rechargeable transit card. It's the single best thing you can do for your first day in Seoul.

Why T-money beats single journey tickets:

  • Cheaper per ride: ₩1,400 (~$1.00 USD) base fare vs ₩1,500
  • Transfer discounts: free transfers between subway and bus within 30 minutes
  • Works on buses, taxis, and even some convenience stores
  • No fumbling with machines every time you travel

Where to buy:

  • Any GS25, CU, 7-Eleven, or Emart24 convenience store
  • Ticketing machines at major stations
  • Cost: ₩2,500–₩4,000 (~$1.80–$3.00) for the card itself

How to load money: Bring the card to any convenience store and tell them how much you want to add. "충전해주세요" (chung-jeon-hae-ju-se-yo) means "please recharge." Or use the ticketing machines — there's an English option.

How much to load: For a week of normal sightseeing, ₩30,000–₩50,000 (~$22–$37) is usually enough.

Important note: T-money cards purchased in Korea work on all public transit. Some tourist-specific cards (like the Discover Seoul Pass) include T-money functions — useful if you also want museum discounts, but the plain T-money card is cheaper if you just need transit.

Reading the Subway Map

Line Colors and Numbers

Seoul's lines are numbered and color-coded. Once you memorize the colors, navigation becomes intuitive:

Line Color Key Stations
Line 1 Dark Blue Seoul Station, Jonggak, Dongdaemun
Line 2 Green Hongdae, Sinchon, Gangnam, Sindorim
Line 3 Orange Gyeongbokgung, Anguk, Express Bus Terminal
Line 4 Sky Blue Myeongdong, Dongdaemun History & Culture Park
Line 5 Purple Yeouido, Gwanghwamun, Macheon
Line 6 Brown Itaewon, Mapo, Sangsu
Line 7 Olive/Dark Green Konkuk Univ., Nowon
Line 8 Pink Jamsil, Moran
Line 9 Gold Gimpo Airport, Express Bus Terminal, Samseong
Bundang Line Yellow-Green Suseo, Migeum, Jeongja
Sinbundang Line Red Gangnam, Yangjae, Gwanggyo

Line 2 is the one you'll use most. It's a circular line running through the most tourist-friendly neighborhoods — Hongdae, Sinchon, City Hall, Euljiro, and Gangnam all sit on Line 2.

How to Read a Station Name

Every station sign shows the station name in Korean, English, and Chinese. The signs also show the previous and next station, which makes it nearly impossible to get lost. When the train pulls up, the conductor announces the station in Korean, English, and sometimes Chinese.

Transfer Stations

Transfer stations (where multiple lines intersect) are marked with multiple colored circles. At these stations, you'll follow colored signage to change platforms — no need to tap out and back in, transfers within 30 minutes are free with T-money.

Big transfer hubs to know:

  • Seoul Station: Lines 1, 4, AREX, KTX
  • Dongdaemun History & Culture Park: Lines 2, 4, 5
  • Express Bus Terminal: Lines 3, 7, 9
  • Sindorim: Lines 1, 2
  • Konkuk University: Lines 2, 7

Rush Hour: When to Avoid the Subway

Seoul rush hour is real and intense. Not "uncomfortable" intense — genuinely packed-like-sardines intense.

Morning rush: 7:30 AM – 9:30 AM Evening rush: 6:00 PM – 8:30 PM

If you're sightseeing, start your day before 7:30 or after 9:30. The subway is a completely different (and much more pleasant) experience outside rush hours.

Line 2 and Line 9 are the worst during peak times. Line 9 in particular — the express service between Gimpo Airport and Gangnam — gets absolutely brutal in the mornings.

Subway Etiquette

Koreans are generally polite on the subway, and a few unwritten rules apply:

Absolute rules:

  • No phone calls. This is the number one rule. Text, browse, watch videos with headphones — all fine. Talking on the phone is considered extremely rude. You'll see Koreans step off the train or walk to between the cars to take a call.
  • Priority seats are for priority passengers. The pink-marked seats at the ends of each car are reserved for elderly people, pregnant women, and disabled passengers. Even if the car is empty, locals often won't sit there. As a tourist, it's better to avoid them.
  • Eat quietly, if at all. Strong-smelling food on the subway will get you dirty looks.
  • Queue up properly. Yellow floor markings show where to stand while waiting. Let passengers exit before you board.

Common tourist mistakes:

  • Standing on the left side of escalators (stand right, walk left)
  • Forgetting to tap out (you'll be charged the maximum fare)
  • Blocking the doors while people are boarding

Essential Apps

KakaoMap

KakaoMap is what locals actually use. It has real-time transit updates, accurate walking directions, and its subway routing is excellent. The English version works well. Download this before you arrive.

Naver Map is the other major option. Slightly more useful for finding specific restaurants and businesses. Both apps will serve you well — pick one and stick with it.

Google Maps note: Google Maps works in Korea but is less accurate for transit and walking directions because Korean mapping data has legal restrictions. It'll get you there eventually, but KakaoMap is faster and more precise.

Subway Korea / Seoul Subway App

Dedicated subway apps show you exact train arrival times and fare calculators. The "Subway Korea" app (available on iOS and Android) is clean and easy to use.

Airport Express: AREX

The AREX connects Incheon Airport directly to Seoul Station.

Express Train (non-stop):

  • Fare: ₩11,000 (~$8 USD)
  • Time: 43 minutes
  • Runs every 30-40 minutes
  • First train: 5:20 AM, Last train: 10:50 PM

All-Stop Train:

  • Fare: ₩4,850 (~$3.50 USD) — or use your T-money card
  • Time: ~66 minutes
  • Runs every 6-12 minutes
  • Stops include Hongdae, Digital Media City, Gongdeok

If you're staying near Hongdae or Mapo, the all-stop train drops you off practically at your hotel and costs less than a coffee at home.

IMPORTANT: AREX is a separate system from the regular Seoul Metro. Your T-money card works on the all-stop train, but the express train requires a separate ticket purchase.

Last Train Times

The Seoul subway runs until approximately midnight, but last trains vary by line and direction.

General rule: The last trains depart terminal stations around 11:00 PM–12:00 AM, arriving at the opposite end around 1:00 AM. Check the board at the station entrance showing "Last Train" times.

If you're out late in Hongdae, Itaewon, or Gangnam, plan to either leave before midnight or budget for a taxi. Taxis are plentiful and apps like Kakao T make them easy to hail.

Luggage Storage

Large lockers are available at major stations:

  • Incheon Airport Stations (T1 and T2): Multiple locker banks, sizes from small bags to large suitcases
  • Seoul Station: Large locker area on the main concourse
  • Hongdae: Lockers near Exit 3 and in nearby guesthouses
  • Myeongdong (Line 4): Lockers in station and nearby CU convenience stores

Pricing: ₩2,000–₩6,000 per day ($1.50–$4.50) depending on locker size.

You can also use Naver Map to search "물품 보관소" (luggage storage) near any location — convenience stores increasingly offer this service too.

Quick-Start Checklist

Before your first subway ride:

  • Buy a T-money card at the airport convenience store
  • Load at least ₩20,000 (~$15) onto the card
  • Download KakaoMap or Naver Map
  • Screenshot the subway map (works offline)
  • Note your hotel's nearest subway station and line

The Seoul subway looks intimidating on paper. In practice, it's one of the most foreigner-friendly transit systems in the world — English announcements, English signage, and apps that do all the hard thinking for you. You'll be navigating it confidently within two days.