Flight 323 landed safely at the Saskatoon airport, WestJet reported.
Saskatoon Police are on the scene investigating, and plan to provide an update shortly.
The 737-700 airline was carrying 113 passengers and five crew members.
Flight 323 is operated on a 737-700 aircraft.
There were 113 guests and five crew members - all have left the aircraft via stairs and are boarding buses.
The development comes after six passengers were injured during an emergency evacuation of a WestJet flight in Winnipeg on Monday night. The Boeing 737-700 was about an hour and a half into its flight from Edmonton to Toronto when it made its emergency landing due to a received threat. Passengers eventually arrived in Toronto on Tuesday afternoon.
More to come.