From Indianapolis, IN to Tucson, AZ: approximately 1,650 miles (2,655 km) via I-70 W → I-40 W (most direct). Driving time: ~24 hours non-stop; 2–3 days with rest. Alternative: I-44 W → I-40 W through St. Louis, Oklahoma City. Flight: 3.5 hrs non-stop (IND–TUS). Tucson is in the Sonoran Desert; Indianapolis in the Midwest—vast climate and landscape difference.