Seoul Subway on-time report, 2026-08-21
How punctual the Seoul Subway was on 2026-08-21: on-time rate by line, the least punctual line, and delays by hour.
Summary of the day
On 2026-08-21, of 193,224 Seoul Subway arrivals matched to the timetable, 86.3% came within 5 minutes.
The least punctual line was Gyeongchun Line (47.4% on time).
On-time rate by line
| Line | On time |
|---|---|
| Gyeongchun Line | 47.4% |
| Seohae Line | 65.7% |
| Gyeongui–Jungang Line | 66.6% |
| Line 4 | 69.4% |
| Ui–Sinseol Line | 73.1% |
| Sillim Line | 73.8% |
| Line 2 | 79.0% |
| AREX Airport Railroad | 81.1% |
| Line 1 | 84.7% |
| Line 9 | 85.4% |
| Gyeonggang Line | 88.8% |
| Suin–Bundang Line | 93.3% |
| GTX-A | 93.4% |
| Line 3 | 95.2% |
| Line 7 | 98.2% |
| Line 5 | 99.0% |
| Line 6 | 99.4% |
| Line 8 | 99.5% |
| Sinbundang Line | 100.0% |
Compiled from real-time train position data published by Seoul Open Data Plaza.