Bus 21 in Ottawa links Blair D and Canotek / Rainbow. The route is 6.5 km long with 13 stops, and the official schedule from OC Transpo puts the full trip at about 6 minutes. On a weekday it runs 3 trips in one direction.
Route at a glance
| Mode | Bus |
|---|---|
| Route number | 21 |
| City | Ottawa |
| Transit authority | OC Transpo |
| Start → end | Blair D → Canotek / Rainbow |
| End → start | Canotek / Rainbow → Blair D |
| Route length | 6.5 km / 5.7 km in the opposite direction |
| Number of stops | 13 / 11 in the opposite direction |
| Travel time | about 6 minutes |
| Trips per day | 3 on weekdays one way |
| Frequency | peak 28–62 |
| First / last trip from «Blair D» | 07:10 / 08:40 |
| First / last trip from «Canotek / Rainbow» | 16:05 / 17:06 |
| Fare | — |
| Updated | August 23, 2026 |
Route of Bus 21
Outbound: Blair D → Canotek / Rainbow
This direction has 13 stops and runs 6.5 km. The route passes Montréal / R.r. 174, Canotek / Shefford, Canotek / Ad. 5350, Canotek / Ad. 5420. Below is the full list with the distance from the first stop.
| No. | Stop | From start | Note |
|---|---|---|---|
| 1 | Blair D | 0.0 km | Terminus |
| 2 | Montréal / R.r. 174 | 4.0 km | |
| 3 | Montréal / Shefford | 4.2 km | |
| 4 | Canotek / Shefford | 4.5 km | |
| 5 | Canotek / Rainbow | 4.6 km | |
| 6 | Canotek / Ad. 5350 | 4.9 km | |
| 7 | Canotek / Ad. 5370 | 5.1 km | |
| 8 | Canotek / Ad. 5420 | 5.3 km | |
| 9 | Canotek / Ad. 5480 | 5.6 km | |
| 10 | Canotek / Ad. 5510 | 5.8 km | |
| 11 | Canotek / Ad. 5369 | 6.1 km | |
| 12 | Canotek / Ad. 5350 | 6.3 km | |
| 13 | Canotek / Rainbow | 6.5 km | Terminus |
Inbound: Canotek / Rainbow → Blair D
This direction has 11 stops and runs 5.7 km. The route passes Canotek / Ad. 5370, Canotek / Ad. 5480, Canotek / Ad. 5369, Canotek / Rainbow. Below is the full list with the distance from the first stop.
| No. | Stop | From start | Note |
|---|---|---|---|
| 1 | Canotek / Ad. 5350 | 0.0 km | Terminus |
| 2 | Canotek / Ad. 5370 | 0.2 km | |
| 3 | Canotek / Ad. 5420 | 0.4 km | |
| 4 | Canotek / Ad. 5480 | 0.7 km | |
| 5 | Canotek / Ad. 5510 | 0.9 km | |
| 6 | Canotek / Ad. 5369 | 1.2 km | |
| 7 | Canotek / Ad. 5350 | 1.4 km | |
| 8 | Canotek / Rainbow | 1.6 km | |
| 9 | Shefford / Montréal | 1.9 km | |
| 10 | Montréal / Shefford | 2.1 km | |
| 11 | Blair C | 5.7 km | Terminus |
Schedule and frequency
According to the official schedule from OC Transpo, the route runs 3 trips in one direction on a weekday.
| Direction | Weekdays | Weekends and holidays |
|---|---|---|
| From «Blair D» | 07:10 — 08:40 | — — — |
| From «Canotek / Rainbow» | 16:05 — 17:06 | — — — |
Frequency calculated from the departure table: in the morning peak buses run every 28–62 minutes, most often every 45.
Frequently asked questions
When do the first and last trips run?
From Blair D the first is at 07:10 and the last at 08:40. From Canotek / Rainbow they are 16:05 and 17:06.
How long does the trip from Blair D to Canotek / Rainbow take?
About 6 minutes end to end — the median of full trips in the official schedule.
How many stops does the route have?
13 outbound and 11 inbound according to the official GTFS feed. The two lists do not match exactly.
Does bus 21 run on weekends?
Yes, the route runs every day, with a separate weekend schedule.
Every route number with its termini, operating hours and travel time is collected in the Ottawa buses overview.
Data current as of August 23, 2026. Schedule and termini — OC Transpo. Fares — OC Transpo. Stop list, schedule and route geometry come from the official GTFS feed (OC Transpo, version S1000512-S1000514).