Bus 18 in Ottawa links Billings Bridge 4C and St-laurent B. The route is 13.6 km long with 54 stops, and the official schedule from OC Transpo puts the full trip at about 54 minutes. On a weekday it runs 38 trips in one direction, and 23 on a weekend day.
Route at a glance
| Mode | Bus |
|---|---|
| Route number | 18 |
| City | Ottawa |
| Transit authority | OC Transpo |
| Start → end | Billings Bridge 4C → St-laurent B |
| End → start | St-laurent B → Billings Bridge 4C |
| Route length | 13.6 km / 13.6 km in the opposite direction |
| Number of stops | 54 / 55 in the opposite direction |
| Travel time | about 54 minutes |
| Trips per day | 38 on weekdays, 23 on weekends one way |
| Frequency | peak 4–31 · midday 30–33 · weekend 30–61 |
| First / last trip from «Billings Bridge 4C» | 05:04 / 23:45 |
| First / last trip from «St-laurent B» | 05:49 / 23:49 |
| Fare | — |
| Updated | August 23, 2026 |
Route of Bus 18
Outbound: Billings Bridge 4C → St-laurent B
This direction has 54 stops and runs 13.6 km. The route passes Bank / Riverside, Main / Oblats, Rideau / Cumberland, Queen Mary / Vanier. Below is the full list with the distance from the first stop.
| No. | Stop | From start | Note |
|---|---|---|---|
| 1 | Billings Bridge 4C | 0.0 km | Terminus |
| 2 | Bank / Riverside | 0.4 km | |
| 3 | Bank / Riverside | 0.6 km | |
| 4 | Bank / Riverdale | 0.8 km | |
| 5 | Riverdale / Windsor | 1.1 km | |
| 6 | Riverdale / Belmont | 1.2 km | |
| 7 | Riverdale / Sunnyside | 1.5 km | |
| 8 | Riverdale / Southern | 1.7 km | |
| 9 | Riverdale / Avenue | 1.9 km | |
| 10 | Riverdale / Ad. 111 | 2.1 km | |
| 11 | Riverdale / Glenview | 2.4 km | |
| 12 | Main / Beckwith | 2.7 km | |
| 13 | Main / Clegg | 2.9 km | |
| 14 | Main / Herridge | 3.1 km | |
| 15 | Main / Oblats | 3.3 km | |
| 16 | Main / Lees | 3.6 km | |
| 17 | Hawthorne / Main | 3.8 km | |
| 18 | Hawthorne / Colonel By | 4.0 km | |
| 19 | Elgin / Park | 4.4 km | |
| 20 | Elgin / Mcleod | 4.5 km | |
| 21 | Elgin / Waverly | 4.7 km | |
| 22 | Elgin / Gilmour | 4.8 km | |
| 23 | Elgin / Cooper | 5.1 km | |
| 24 | Elgin / Nepean | 5.3 km | |
| 25 | Elgin / Slater | 5.6 km | |
| 26 | Elgin / Wellington | 5.9 km | |
| 27 | Rideau B | 6.2 km | |
| 28 | Rideau / Cumberland | 6.6 km | |
| 29 | Rideau / King Edward | 6.9 km | |
| 30 | Rideau / Nelson | 7.0 km | |
| 31 | Rideau / Friel | 7.2 km | |
| 32 | Rideau / Augusta | 7.5 km | |
| 33 | Rideau / Charlotte | 7.8 km | |
| 34 | North River / Montréal | 8.3 km | |
| 35 | North River / Ad. 333 | 8.4 km | |
| 36 | North River / Washington | 8.7 km | |
| 37 | North River / Ontario | 8.9 km | |
| 38 | North River / Columbus | 9.1 km | |
| 39 | Queen Mary / North River | 9.4 km | |
| 40 | Queen Mary / Marion | 9.5 km | |
| 41 | Queen Mary / Vanier | 9.7 km | |
| 42 | Queen Mary / Vera | 9.8 km | |
| 43 | Queen Mary / Quill | 10.0 km | |
| 44 | Queen Mary / Lola | 10.4 km | |
| 45 | Lola / Presland | 10.7 km | |
| 46 | Lola / Coventry | 10.8 km | |
| 47 | 360 Coventry | 11.1 km | |
| 48 | Belfast / Coventry | 11.3 km | |
| 49 | Tremblay / Avenue P | 11.8 km | |
| 50 | Tremblay / Avenue R | 11.9 km | |
| 51 | Tremblay / Avenue U | 12.2 km | |
| 52 | Tremblay / Ad. 530 | 12.4 km | |
| 53 | St-laurent / Tremblay | 12.8 km | |
| 54 | St-laurent B | 13.6 km | Terminus |
Inbound: St-laurent B → Billings Bridge 4C
This direction has 55 stops and runs 13.6 km. The route passes St-laurent / Tremblay, Queen Mary / Marion, Rideau / Dalhousie, Main / Oblats. Below is the full list with the distance from the first stop.
| No. | Stop | From start | Note |
|---|---|---|---|
| 1 | St-laurent D | 0.0 km | Terminus |
| 2 | St-laurent / Tremblay | 0.9 km | |
| 3 | Tremblay / Ad. 529 | 1.3 km | |
| 4 | Tremblay / Avenue U | 1.5 km | |
| 5 | Tremblay / Avenue R | 1.7 km | |
| 6 | Tremblay / Belfast | 2.1 km | |
| 7 | Belfast / Coventry | 2.4 km | |
| 8 | Coventry / Belfast | 2.5 km | |
| 9 | Lola / Coventry | 2.8 km | |
| 10 | Lola / Presland | 3.0 km | |
| 11 | Queen Mary / Lola | 3.2 km | |
| 12 | Queen Mary / Quill | 3.6 km | |
| 13 | Queen Mary / Vera | 3.8 km | |
| 14 | Queen Mary / Vanier | 4.0 km | |
| 15 | Queen Mary / Marion | 4.2 km | |
| 16 | Queen Mary / North River | 4.3 km | |
| 17 | North River / Columbus | 4.6 km | |
| 18 | North River / Ontario | 4.8 km | |
| 19 | North River / Washington | 4.9 km | |
| 20 | North River / Mcarthur | 5.2 km | |
| 21 | North River / Selkirk | 5.3 km | |
| 22 | Rideau / Wurtemburg | 5.8 km | |
| 23 | Rideau / Charlotte | 6.0 km | |
| 24 | Rideau / Augusta | 6.2 km | |
| 25 | Rideau / Chapel | 6.4 km | |
| 26 | Rideau / Nelson | 6.7 km | |
| 27 | Rideau / King Edward | 6.9 km | |
| 28 | Rideau / Dalhousie | 7.2 km | |
| 29 | Rideau A | 7.3 km | |
| 30 | Elgin / Queen | 8.0 km | |
| 31 | Elgin / Slater | 8.2 km | |
| 32 | Elgin / Nepean | 8.5 km | |
| 33 | Elgin / Lisgar | 8.6 km | |
| 34 | Elgin / Somerset W | 8.8 km | |
| 35 | Elgin / Lewis | 9.0 km | |
| 36 | Elgin / Gladstone | 9.2 km | |
| 37 | Elgin / Mcleod | 9.3 km | |
| 38 | Elgin / Catherine | 9.4 km | |
| 39 | Hawthorne / Colonel By | 9.9 km | |
| 40 | Main / Graham | 10.1 km | |
| 41 | Main / Oblats | 10.4 km | |
| 42 | Main / Hazel | 10.6 km | |
| 43 | Main / Clegg | 10.9 km | |
| 44 | Main / Bower | 11.1 km | |
| 45 | Riverdale / Glenview | 11.4 km | |
| 46 | Riverdale / Ad. 100 Riverdale | 11.7 km | |
| 47 | Riverdale / Echo | 11.9 km | |
| 48 | Riverdale / Southern | 12.0 km | |
| 49 | Riverdale / Sunnyside | 12.2 km | |
| 50 | Riverdale / Belmont | 12.5 km | |
| 51 | Riverdale / Cameron | 12.7 km | |
| 52 | Bank / Riverdale | 12.9 km | |
| 53 | Bank / Riverside | 13.2 km | |
| 54 | Billings Bridge / Bank | 13.4 km | |
| 55 | Billings Bridge 3A | 13.6 km | Terminus |
Schedule and frequency
According to the official schedule from OC Transpo, the route runs 38 trips in one direction on a weekday, and 23 on a weekend day.
| Direction | Weekdays | Weekends and holidays |
|---|---|---|
| From «Billings Bridge 4C» | 05:04 — 23:45 | 08:05 — 23:51 |
| From «St-laurent B» | 05:49 — 23:49 | 07:57 — 23:07 |
Frequency calculated from the departure table: in the morning peak buses run every 4–31 minutes, most often every 29; midday every 30–33 minutes; in the afternoon peak every 28–29; on weekends every 30–61 minutes.
Frequently asked questions
When do the first and last trips run?
From Billings Bridge 4C the first is at 05:04 and the last at 23:45. From St-laurent B they are 05:49 and 23:49.
How long does the trip from Billings Bridge 4C to St-laurent B take?
About 54 minutes end to end — the median of full trips in the official schedule.
How many stops does the route have?
54 outbound and 55 inbound according to the official GTFS feed. The two lists do not match exactly.
Does bus 18 run on weekends?
Yes. On weekends and holidays there are 23 trips in one direction, running from Billings Bridge 4C between 08:05 and 23:51.
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).