O-Train service to the Ottawa airport was suspended for over two hours on Saturday due to a switch issue, the second time in two days a problem has shut down the spur. OC Transpo said Line 4 was “temporarily suspended” in a post on X shortly before 3:25 p.m. The Ottawa Airport Authority said Route 105 bus service was increased and had asked travellers to allow extra time to get to the airport. OC Transpo said the train was back in service by 5:30 p.m. The shutdown comes after the four-kilometre line was closed for over eight hours due to a “technical issue with a train” on Friday. OC Transpo did not specify the exact cause. Line 4 runs between South Keys and Airport stations, with a stop at Uplands near the Cohere Centre. The line has experienced several shutdowns since it opened in January 2025 for mechanical issues and staff shortages.
