Line 4 (O-Train)

Line 4
Line 4 at Airport station
Overview
Other name(s)Airport Link
StatusOpen
OwnerCity of Ottawa
LocaleOttawa, Ontario
Stations3
WebsiteLine 4 (OC Transpo)
Service
TypeDiesel light rail
SystemO-Train
Rolling stockAlstom Coradia LINT 41
History
OpenedJanuary 6, 2025 (2025-01-06)
Technical
Line length4 km (2.5 mi)
Track gauge1,435 mm (4 ft 8+12 in) standard gauge
Operating speed50–80 km/h (31–50 mph)
Route map
Line 4 highlighted in blue
South Keys
Hunt Club loop
Uplands
Airport

All stations are accessible

Line 4 (French: Ligne 4), also known as the Airport Link (French: Antenne de l'Aéroport), is a diesel light rail line on the O-Train network in Ottawa, Ontario. The line provides a connection between Line 2 (also known as the Trillium Line) at South Keys station to Ottawa Macdonald–Cartier International Airport. The four-kilometre (2.5 mi) line opened on January 6, 2025.