What's the situation?

Pick the scenario you're in. The advice changes a lot between "missed last train" and "need a pharmacy at 3am".

Quick facts

What's reliably 24h

By category. Chain-level + system-level guarantees, not specific venues that may shift.

• Convenience stores

  When Default 24h. CU / GS25 / 7-Eleven / Emart24, all four chains.

  Reliable

  • Hot food (cup ramyun via dispenser, microwave lunch boxes).
  • Free water + clean counters to sit.
  • ATM (foreign card, ₩3,500 to ₩5,000 fee).
  • Bathroom in some, ask the clerk.

  Watch out

  • A handful of branches near schools / offices close 23:00 to 06:00. Check the sign on the door.

• 24h cafes

  When Limited. Most chain cafes close 22:00 to 23:00; only select branches stay 24h.

  Reliable

  • Caffe Pascucci has 24h branches in Hongdae, Gangnam, near major hospitals.
  • Twosome Place select tourist-area branches stay open until 02:00 to 24h.
  • Study cafes (스터디카페) are an alternative; ~₩3,000 to ₩6,000/hour, all 24h.

  Watch out

  • Chain "24h" branches change yearly; verify on Naver Map before going.

• Late-night transit

  When Subway gone, N-bus or Kakao T fill the gap.

  Reliable

  • N-bus 9 routes from ~midnight to ~04:00; ₩2,500.
  • Kakao T (Uber-style app) works 24/7 with English UI.
  • Regular taxis are abundant late, just flag from the curb.

  Watch out

  • N-bus has limited coverage; not all districts. Surge fares on Kakao T 23:00 to 02:00 Fri/Sat (~1.5x).

• Jjimjilbang (sauna + sleep)

  When Stuck without a hotel, want a budget option, or arrive too late to check in.

  Reliable

  • ~₩10,000 to ₩15,000 for 12 hours including sleep room.
  • Shower, sauna, snack bar, sleep mats with pillows.
  • Major 24h: Dragon Hill Spa (Yongsan), SilOam (Seoul Station), Itaewon Land.

  Watch out

  • Mixed-PJ common rooms can get noisy on weekends. Bring earplugs.
  • Tattoos: most accept now, but verify policy at smaller suburbs.

• Late-night pharmacy

  When Late illness, post-bar headache, allergic reaction.

  Reliable

  • Korea's 휴일지킴이약국 rotation keeps a few pharmacies per district open until 01:00 to 02:00.
  • Search "심야약국 + neighborhood" on Naver Map.
  • Hospital ER (응급실) is the 24/7 fallback; English-speaking staff at International Clinics (Severance, Asan, Samsung).

  Watch out

  • Truly 24h pharmacies are rare; most "late-night" close at 02:00.
  • Plan ahead: keep painkillers/electrolytes in hotel.

Watch out for

• Last train sneaks up Seoul subway last train is around 23:30, but 9Line 9 and a few others can be earlier. Check the platform indicator at every transfer; "막차" (last train) signs flash red. Set a 22:30 alarm if you're drinking.
• N-bus is a real tool Routes N15 (Gangnam) / N16 (Hongdae) / N26 (Jamsil) / N75 (Yeouido) are the most useful. Tap T-money like a regular bus, ₩2,500. The bus stops are marked with a blue moon icon at the top.
• Kakao T over street taxi After midnight, street taxis sometimes refuse short routes or push for cash. Kakao T (English UI, card on file, fixed quote) avoids the haggle. Download before your trip.
• ICN late arrival If you land at ICN past 01:00 with no transit option, the Spa on Air sauna (T1 B1) is 24h, ~₩30,000 includes shower + sleep + breakfast voucher. Cheaper than an airport hotel.
• "24h" is not always 24h Naver Map / Kakao Map listings can be out of date. Call the venue if you are pinning a 4am plan. Convenience stores (chain-guaranteed) and Kakao T (always-on) are the only "no need to verify" categories.

Sources

Updated May 2026. Subway last-train times verified against Seoul Metro May 2026 timetable; jjimjilbang and pharmacy listings are category-level (verify each venue on Naver Map before a 4am plan).