SONIC Drive-In Address: 925 South State Highway 78, Lavon, TX 75166 Phone: (972) 853-0970 Restaurants, Foods-Carry Out, Sonic Drive In Other Businesses: Sonic Drive In at 925 State Highway 78, Lavon, TX 75166 Paradise Plumbing at 103 Morrow Ln, Lavon, TX 75166 Ilash Artist Paradise Nails at 440 State Highway 78, Lavon, TX 75166 Milanos Pizza at 450 State Highway 78, Lavon, TX 75166