How many hours do you set your watch back after flying from St. Jhon's to Winnipeg?

When flying from St. John's, Newfoundland and Labrador, to Winnipeg, Manitoba, you set your watch back by one and a half hours. St. John's operates on Newfoundland Time (UTC-3:30), while Winnipeg is in Central Time (UTC-6). Therefore, you subtract 1.5 hours from the time in St. John's when you arrive in Winnipeg.