Air Time

I flew to Florida yesterday morning. The flight was scheduled for 9:35am. When I arrived at the airport it had been changed to 9am. It was a foggy day and the previous flight had to circle for 45 minutes before it landed, delaying my flight. We took off at 10am, for a flight that was listed to land at 1:16pm. Somehow we landed at 12:30pm. This was either great time management or someone does not know how to calculate figures.