| Champaign to Orangevale (California) | 1,751.74 mi (2,819.15 km) |
| Champaign to Orchards (Washington) | 1,761.80 mi (2,835.35 km) |
| Champaign to Orcutt (California) | 1,789.08 mi (2,879.25 km) |
| Champaign to Oregon (Ohio) | 274.28 mi (441.42 km) |
| Champaign to Oregon (Wisconsin) | 202.61 mi (326.08 km) |
| Champaign to Oregon City (Oregon) | 1,764.83 mi (2,840.22 km) |
| Champaign to Orem (Utah) | 1,232.58 mi (1,983.65 km) |
| Champaign to Orinda (California) | 1,816.13 mi (2,922.77 km) |
| Champaign to Orland Park (Illinois) | 105.40 mi (169.62 km) |
| Champaign to Orlando (Florida) | 895.48 mi (1,441.14 km) |
| Champaign to Ormond Beach (Florida) | 850.37 mi (1,368.55 km) |
| Champaign to Oro Valley (Arizona) | 1,366.90 mi (2,199.81 km) |
| Champaign to Oroville (California) | 1,757.06 mi (2,827.71 km) |
| Champaign to Oshkosh (Wisconsin) | 270.45 mi (435.26 km) |
| Champaign to Oskaloosa (Iowa) | 242.74 mi (390.65 km) |
