Crank your engine and turn the AC on high cool, high fan. If your recharging hose is equipped with a pressure gauge, check it to determine if the system needs refrigerant. If the pressure holds steady in the recommended range, the system is full and should not be charged.
The driving distance between Dallas, TX and McKinney, TX is 32 miles. The driving time would be approximately 35 minutes if driving non-stop in good conditions. (The driving time does not take into consideration conditions such as weather, road work and rush hour traffic in urban areas.).
McKinney National Airport Location. 1  McKinney National Airport is located in the rapidly growing North Texas region at the confluence of Sam Rayburn Tollway (SRT) / S.H. 121, U.S. 75 and U.S. 380 - just 30 minutes from downtown Dallas. In fact, about 80% of the companies in Richardson, Plano and Allen are closer to McKinney than any other Dallas area airport.