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21Line 21 Białystok
Białystok bus line 21 (BKM Białystok): Piastowska – Zielone Wzgórza. Timetable, the route with every stop, operating hours and punctuality, by the timetable for Wednesday 11.11.2026.
Line 21 route and stops
Towards: Zielone Wzgórza (47 trips, 19 stops)
| Hour | Minutes |
|---|---|
| 5 | 22 52 |
| 6 | 17 42 |
| 7 | 07 32 57 |
| 8 | 22 45 |
| 9 | 10 35 58 |
| 10 | 18 38 58 |
| 11 | 18 38 58 |
| 12 | 18 38 58 |
| 13 | 18 38 58 |
| 14 | 18 38 58 |
| 15 | 18 38 58 |
| 16 | 18 38 58 |
| 17 | 20 45 |
| 18 | 10 35 |
| 19 | 00 25 50 |
| 20 | 15 40 |
| 21 | 05 30 |
| 22 | 00 30 |
Trips that do not call at this stop: 1. They are not in the table.
Pick a stop to see its departures.
- Zielone Wzgórza Pętla
Towards: Piastowska (46 trips, 18 stops)
| Hour | Minutes |
|---|---|
| 5 | 10 35 |
| 6 | 00 25 50 |
| 7 | 15 40 |
| 8 | 05 30 55 |
| 9 | 20 43 |
| 10 | 03 23 43 |
| 11 | 03 23 43 |
| 12 | 03 23 43 |
| 13 | 03 23 43 |
| 14 | 03 23 43 |
| 15 | 03 23 43 |
| 16 | 03 23 43 |
| 17 | 03 28 53 |
| 18 | 18 43 |
| 19 | 08 33 |
| 20 | 00 30 |
| 21 | 00 30 |
| 22 | 00 30 |
Pick a stop to see its departures.
- Piastowska/Pętla (W)
Trips through the day
Departures of line 21 from its terminus in each hour, by the timetable for Wednesday 11.11.2026.
Line 21 punctuality
In the last 7 days 81% of line 21's measurements were on time (from a minute early to 3 minutes late). 16% were at least 3 minutes late, and the average deviation from the timetable was 1.4 min. That is better than the city average (80% on time). Over the last 30 days the average delay was 1.4 min.
Measured every minute from live vehicle positions against the timetable.
Questions about line 21
When is the first and last trip of line 21 in Białystok?
By the timetable for Wednesday 11.11.2026, line 21's first departure is at 05:10 and the last at 17. Other days may differ; the Wiesz Kiedy planner shows current departures.
How often does line 21 run?
At peak times line 21 runs roughly every 20 minutes each way, 93 trips a day in all.
Where is the line 21 bus right now?
On the Wiesz Kiedy live map: wieszkiedy.pl/en/app?city=bialystok&line=21 shows every vehicle on line 21 with its direction and delay.
Is line 21 often late?
In the last 7 days 81% of line 21's measurements were on time, and 16% were at least 3 minutes late.
Other buses in Białystok
Timetable data: BKM Białystok (data sources). Wiesz Kiedy is independent and not affiliated with any operator. Updated 2026-11-11.