Simya A21

심야A21

Checked on May 1, 2026

Information based on Kakao Map. Please confirm before riding.

About this route

Simya A21 is a late-night autonomous bus that runs west from Dongdaemun along Jongno, through Sinchon and Hongdae, to Hapjeong. It links the historic city centre with the north-western nightlife districts.

How the route runs

Service begins at 23:00 and continues until 03:40 the next morning. The bus turns around at Hapjeong station and returns to Dongdaemun, covering 40 stops on the round trip.

Route at a glance

First stop: Dongdaemun Station(Heunginjimun)
Turnaround: Hapjeong station
Final stop: Dongdaemun Station.Heunginjimun Gate
Service hours: 23:00 – 03:40

Key stops

Dongdaemun Station(Heunginjimun)
Jongno 3(sam)-ga.Tapgol Park
Sinchon Ogeori, Line 2 Sinchon station
Hongik Univ. station
Hapjeong station

When to use it

Covers late-night travel around Jongno, Sinchon and Hongdae. Service runs from 23:00 to 03:40, after the subway has stopped running.

Stops (40)

Show all 40 stopsShow key stops only

01Dongdaemun Station(Heunginjimun)
02Jongno 6-ga.Dongdaemun Market
03Jongno 5(o)-ga.Gwangjang Market
04Jongno 4-ga.Jongmyo Shrine
05Jongno 3(sam)-ga.Tapgol Park
06Jongno 2-ga
07Jongno 1-ga
08Gwanghwamun Station
09Seoul Museum of History, Gyeonghuigung Palace
10Seodaemun Station- Sageori
11Chungjeongno station
12Ahyeon station
13Wedding Town
14Ewha Womans Univ. station
15Sinchon Ogeori, Line 2 Sinchon station
16Sinchon Ogeori, Hyundai Dept. store
17Donggyo-dong Samgeori
18Hongik Univ. station
19Seogyo-dong
20Hapjeong station
21Hapjeong station
22Seogyo-dong
23Hongik Univ. station
24Donggyo-dong Samgeori
25Sinchon Ogeori, Hyundai Dept. store
26Sinchon Ogeori, Line 2 Sinchon station
27Ewha Womans Univ. station
28Wedding Town
29Ahyeon station
30Chungjeongno station
31Seodaemun Station- Sageori
32Seoul Museum of History, Gyeonghuigung Palace
33Gwanghwamun Station
34Jongno 1-ga
35Jongno 2-ga
36Jongno 3(sam)-ga.Tapgol Park
37Jongno 4-ga.Jongmyo Shrine
38Jongno 5(o)-ga.Gwangjang Market
39Jongno 6-ga.Dongdaemun Market
40Dongdaemun Station.Heunginjimun Gate

01Dongdaemun Station(Heunginjimun)
동대문역.흥인지문
20Hapjeong station
합정역
40Dongdaemun Station.Heunginjimun Gate
동대문역.흥인지문

Common questions about this route

Where do I board this route?: Board at Dongdaemun Station(Heunginjimun). The route turns around at Hapjeong station and returns to Dongdaemun Station.Heunginjimun Gate.
When does this route operate?: Service runs from 23:00 to 03:40.
What days does it run, and how often?: Operating days: Weekdays. Headway: 140 min.
What information has been checked on this page?: The route endpoints, stop list and displayed operating times have been checked. Fare, operator, reservation and app requirements are not presented as confirmed until they are separately verified.
Is real-time arrival info available?: This site does not provide real-time arrival information. Check Kakao Map for the latest status.
What should I check before riding?: Confirm the schedule, stop locations, and service status through Kakao Map or official operator sources before boarding. See our full guide: How to ride →
When was this information last checked?: Stops and listed times were checked on May 1, 2026 against Kakao Map data provided by the Seoul Metropolitan Government.