| Mundelein to Orangevale (California) | 1,751.58 mi (2,818.90 km) |
| Mundelein to Orchards (Washington) | 1,718.94 mi (2,766.36 km) |
| Mundelein to Orcutt (California) | 1,811.76 mi (2,915.75 km) |
| Mundelein to Oregon (Ohio) | 239.01 mi (384.65 km) |
| Mundelein to Oregon (Wisconsin) | 83.51 mi (134.39 km) |
| Mundelein to Oregon City (Oregon) | 1,724.00 mi (2,774.51 km) |
| Mundelein to Orem (Utah) | 1,233.44 mi (1,985.04 km) |
| Mundelein to Orinda (California) | 1,819.26 mi (2,927.82 km) |
| Mundelein to Orland Park (Illinois) | 46.36 mi (74.60 km) |
| Mundelein to Orlando (Florida) | 1,023.55 mi (1,647.25 km) |
| Mundelein to Ormond Beach (Florida) | 975.41 mi (1,569.76 km) |
| Mundelein to Oro Valley (Arizona) | 1,426.81 mi (2,296.23 km) |
| Mundelein to Oroville (California) | 1,751.71 mi (2,819.10 km) |
| Mundelein to Oshkosh (Wisconsin) | 124.30 mi (200.04 km) |
| Mundelein to Oskaloosa (Iowa) | 247.89 mi (398.94 km) |
