O-Train South | OC Transpo

Line 2& Line 4

Overview

Get ready to embark on an enhanced O‑Train journey. With the O‑Train South extension to Limebank and Airport stations, we’re transforming your commute. Enjoy the speed and convenience of state-of-the-art Stadler FLIRT trains.

The line will offer modernized stations, airport connectivity, and reliable service across more neighbourhoods. Whether you're a daily commuter, a student, or a visitor, the O‑Train network is designed with you in mind.

Highlights

10 things you need to know about the O‑Train South extension

Reduced travel time: The journey between South Keys and Bayview is about 15 minutes quicker than Line 2 buses. This will restore the rapid service enjoyed on Line 2 before its closure for extension.
FLIRT Trains: Enjoy higher capacity FLIRT trains. Each new train has 16 doors for efficient boarding. They feature digital screens and comfortable seating.
A station at the airport: Travelling to the airport? The O‑Train will take you there. Line 4 will provide reliable and frequent service.
Expanded capacity: With longer platforms, and larger trains, the O‑Train can carry 60 per cent more riders.
Upgraded stations: Experience new and improved stations. Modern designs, heaters and elevators boost comfort and convenience.
Easy access for Carleton University students: With a station conveniently located right in the heart of the campus, getting to and from Carleton has never been easier.
Multi-use pathways: Our new extension is bike friendly. Pathways connect with most stations. Runnels along stairwells help you wheel your bike between station levels. We welcome bikes on trains too.
Efficient transfers: Fare-paid zones at select stations simplify bus-to-rail transfers.
Maintenance and storage facility: New Albion Yard increases our capacity for maintaining trains.
Weather resilience: Alstom Lint trains have proven their resilience in Ottawa's weather. Stadler FLIRT trains successfully run in winter conditions around the world.

Line 2 runs from Bayview in the north to Limebank in the South, with stops at Dow's Lake (Tulip festival), Carleton (University), Mooney's Bay (beach), Greenboro, South Keys (connection to Line 4 to the airport via the EY Centre), Leitrim (Park & Ride) and Bowesville (Park & Ride). Line 2 connects with Line 1, running east to west at its northern terminus, Bayview Station. Landmark route map of the O-Train south extension showing all the stops listed in the Line Routing, including such stops as Dow's Lake, Carleton University, the Airport, and the EY Centre.

Key figures

New Stations

Upgraded Stations

Min Faster

New Stadler Flirt Trains

Transfer stations

Bayview Station

A graphic map showing Bayview as the transfer station between O-Train line 2 and Line 1

Bayview Station page

South Keys Station

A graphic map showing South keys as the transfer station between Line 2 and Line 4

South Keys Station page

Smooth transition

Existing bus service will continue alongside the extended O-Train South. Line 2 buses and Route 97 will run for a period after the launch of Lines 2 and 4. Choose between bus or O‑Train for your journey. Stay updated at octranspo.com/en/o-train-extension/extension-news.

Learn more about the O‑Train South launch transition

Line 2

Bayview – Limebank

Overview

At 16 km in length, Line 2 will pass through more than 16 neighbourhoods and carry more than 23,000 residents daily.

The extension of O-Train Line 2, formerly known as the Trillium Line, is a significant expansion of OC Transpo's transit system. It will greatly enhance connectivity in the south of the city.

This extension will connect Bayview Station downtown to Limebank Road in Riverside South, stopping at Carleton University and more along the way. It also provides a convenient link to Line 4. This new line will offer direct access to the Ottawa Macdonald-Cartier International Airport.

The Line 2 extension spans eight new stations and 16 kilometres of track. Larger trains will nearly double the line’s capacity. Passing tracks at South Keys and double tracks south of Leitrim to Limebank Road will make operations more flexible.

Highlights

Spot Line 2 with its signature green circle symbol
4 renovated stations
Accessible
Service every 12 minutes
End-to-end travel time less than 35 minutes (subject to operating conditions)
Each train will be able to carry up to 420 passengers comfortably
New maintenance and storage facility at Albion Yard
Alstom Lint trains, coupled together, will occasionally operate on Line 2 Limebank to Bayview

New stations

Park & Ride lots

Km more rail

Linked to the bus, Para Transpo and the airport

Linked to VIA Rail

12‑min frequency

2 Pedestrian bridges

Line routing

A visual representation of Line 2 route map, illustrating the journey from Bayview to Limebank station

Destinations

New places to discover

Carleton University

Carleton University Confederation Heights Little Italy South Keys Shopping Plaza Hunt Club Dow’s Lake Mooney's Bay Riverside South

Photo gallery

Line 2 in pictures

Construction in progress at the southern section of Bayview Station, with the Downtown Line also visible in the image.

Pedestrian bridge next to Carleton University

Construction in progress at Carleton Station, with the university campus also visible in the image.

Construction in progress at the Leitrim Station ( Terminus of Line 2)

Construction in progress at Walkley station

Inside view of the Albion Yard maintenance and storage facility

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Line 4

Airport – South Keys

Overview

Introducing the newest addition to the O‑Train network — Line 4.

New Line 4 bypasses city traffic. This new link will take you to the airport.

Line 4 will provide reliable and frequent service to a modern new station directly at the Departures level.

Line 4 seamlessly connects with other lines in the network: