I have changed the thermostat, water pump, and did a flush because it was overheating. The first few days I drove it short distances and it was fine now I drove it to my mothers which is about 20 minutes/10 miles away and it is overheating again. I also flushed the heater core so I don't know what else to do. Help please

 

What about the cooling fan, is it coming on and coming on at the proper time?

 

Replace the coolant lid and make sure the cooling fans are working. Both fans should turn on whenever the A/C is turned on.