Welcome aboard Lines 2 & 4
Weekday service starts
January 6
Connecting Ottawa South
Lines 2 & 4 are expanding the O-Train south, from Bayview station to Limebank and Airport station. These new lines connect Little Italy to Riverside South, with frequent departures to Carleton University and the Ottawa International Airport.
This page will provide a guide on everything you need to ride the new system.
Prepare
For the launch of O-Train
Lines 
& 
We understand that transitioning to a new service can be challenging, especially when it comes to your commute.
When O-Train Lines 2& 4 launch on January 6, there will be no major changes to the current bus service.
Buses will continue to run as they do today.
This will allow customers the flexibility to continue using the bus while they transition to the new train lines.
Lines 2 4
Phased opening
Based on lessons learned and to ensure customer familiarization and staff training, Lines 2 & 4 will open to the public in three phases. Service will start weekdays only on January 6 for at least two weeks, then expand in phases to six days and later to seven days a week.
Phase 1
5-day service
For min. two weeks
Phase 2
6-day service
For min. two weeks
Phase 3
Full week service
7-day service
After a minimum of two weeks, service will be expanded if the system continues to run safely and reliably. During each phase, staff will monitor the system to ensure it provides a positive customer experience.
To ensure a smooth transition, bus service will continue alongside Lines 2 & 4.
Stay tuned for updates on Saturday and Sunday service!
Learn more
Travel Planner now available
Lines 2& 4are launching on January 6, but you can get a head start with the Travel Planner. It’s the easiest way to explore the new system and prepare for your journeys.
Explore the service, check schedules for Weekdays, Saturdays, and Sundays, and start planning ahead!
Bus service during the transition period
Drawing from experience, we’ve designed a plan to support you and ease your transition to the O-Train. Parallel bus service will continue after Lines 2 4open.
- This service is designed to provide transportation options as you get accustomed to the new train system.
- Transition bus service will continue to run after the opening of Lines 2 & 4, including for a period of time after seven-day service begins.
What to expect?
Bayview - South Keys
Line 2 bus service will continue to run between Bayview and South Keys stations, under a new name: B2.
B2 bus service will serve the same station stops as before.
Ottawa Airport
Route 97 will continue to run to the Airport, providing service alongside Line 4 between South Keys and the Airport.
Leitrim
Route 99 will continue to run its current route in the south.
This will provide bus service alongside Line 2 in the south, and will make connections at Walkley, Greenboro, South Keys and Leitrim Stations.
74, 198, 278, and 406
will connect to Limebank Station.
Parallel bus service map after the launch of Lines 2 & 4
Click on the map to open the PDF
Bus service
for full seven-day O-Train South service
Here’s how bus service in the south will connect with Lines 24 when the seven-day service begins .
-
Line 2 buss will become B2
The B2 will continue running between Bayview and South Keys stations. -
74, 198, 278,and 406
will continue to provide connections to Limebank Station. -
Route 97
Route 97 will continue to run every 15 minutes, serving South Keys, the Airport, and running alongside Line 4 between South Keys and the Airport. -
Route 99
Route 99 will make a new connection at Limebank Station, with buses running every 30 minutes.
Bus network changes coming in April 2025
The New Ways to Bus network is planned to come into effect in April 2025, opening up new convenient connections across the city.
What you need to know :