Line 4 (O-Train)

Line 4
Overview
Status	Open
Owner	City of Ottawa
Locale	Ottawa, Ontario
Stations	3
Website	Line 4 (OC Transpo)
Service
Type	Light rail
System	O-Train
Rolling stock	Alstom Coradia LINT 41
History
Opened	January 6, 2025 (2025-01-06)
Technical
Line length	4 km (2.5 mi)
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Operating speed	50–80 km/h (31–50 mph)
Route map Line 4 highlighted in blue Show interactive map Legend Line 2 to Bayview Southeast Transitway to Hurdman South Keys Hunt Club loop Line 2 to Limebank Airport Parkway Uplands Airport All stations are accessible This diagram: view talk edit Show route diagram

The O-Train Line 4, also known as the Airport Link, is a diesel light rail line on the O-Train network in Ottawa, Ontario. The line provides a connection between the Trillium Line (Line 2) at South Keys station to the Ottawa Macdonald–Cartier International Airport. The four-kilometre (2.5 mi) line opened on January 6, 2025.^[1]