Guide to high-frequency bus lines
Learn about our high-frequency buses and find the best ones for your trips.
Publication date: September 25, 2026
Key points
- High-frequency buses offer shorter wait times from Monday to Friday;
- Buses usually depart every 2 to 12 minutes;
- High-frequency lines are marked in purple on bus stop signs and schedules.
About high-frequency bus lines
STM high-frequency buses usually run every 2 to 12 minutes.
You’ll find them in the city’s busiest areas. You can tell a bus line is highfrequency if it’s marked in purple on network signage and navigation tools.
Some lines are only highfrequency during rush hour, while others are all day.
Find a high-frequency bus schedule
- Figure out which bus line you need for your trip.
- Enter the line name or number here:
All-day high-frequency lines
These 10 bus lines run on a high-frequency schedule from 6 a.m. to 8 p.m., Monday to Friday:
- 18 Beaubien
- 24 Sherbrooke
- 51 Édouard-Montpetit
- 67 Saint-Michel
- 105 Sherbrooke
- 121 Sauvé/Côte-Vertu
- 141 Jean-Talon
- 161 Van Horne
- 165 Côte-des-Neiges
- 439 Express Pie-IX
Rush-hour high-frequency lines
These bus lines run on a high-frequency schedule in the busier direction from 6:30 a.m. to 9:30 a.m. and from 3 p.m. to 6 p.m., Monday to Friday:
- 32 Lacordaire
- 33 Langelier
- 44 Armand-Bombardier
- 45 Papineau
- 48 Perras
- 49 Maurice-Duplessis
- 55 Saint-Laurent
- 64 Grenet
- 69 Henri-Bourassa
- 80 Du Parc
- 90 Saint-Jacques
- 97 Avenue-du-Mont-Royal
- 103 Monkland
- 106 Newman
- 107 Verdun
- 112 Airlie
- 136 Viau
- 160 Barclay
- 171 Henri-Bourassa
- 187 René-Lévesque
- 193 Jarry
- 196 Parc-Industriel-Lachine
- 197 Rosemont
- 211 Bord-du-Lac
- 470 Express Pierrefonds
- 496 Express Victoria
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