A Porter Airlines flight heading from Toronto to Sudbury, Ont., made an emergency landing Sunday evening.
It was the second Porter Airlines flight on Sunday that was diverted from its original route.
The airline confirmed on its website shortly before 9 p.m. that flight PD539 had been diverted to Pearson Airport.
The Greater Toronto Airport Authority said that there was a "medical call" involved in the emergency landing.
Peel paramedics said they transported an elderly female passenger from the plane to an Etobicoke hospital. Despite reports of smoke in the cockpit, they said the woman's health issue was not smoke-related.
Brad Cicero, a spokesperson for Porter, said that there was no indication of a fire in the plane.
"One of the two engines was shut down using standard procedures and the aircraft landed safely," he said.
Medical personnel attended to two passengers for suspected anxiety, Cicero told CTV Toronto.
The flight took off from Billy Bishop Toronto City Airport around 7:30 p.m., according to Porter's website.
Earlier in the day, a Washington, D.C.-bound flight had to divert to rural Pennsylvania after it took off from Billy Bishop around 8 a.m.
It landed safely at Williamsport Regional Airport around 9 a.m., after smoke was detected in the cockpit.
The plane had 66 passengers on board, and the airline's spokesperson said another plane would pick them up and take them on to Washington.
Porter Airlines uses only Canadian-built Bombardier Q400 turboprop aircraft.
The airline reported a number of delays on Sunday and Porter's 8:30 p.m. flight to Sudbury was cancelled.
