| Monticello to Odessa (Texas) | 1,034.22 mi (1,664.41 km) |
| Monticello to Ogden (Utah) | 954.04 mi (1,535.38 km) |
| Monticello to Oildale (California) | 1,484.41 mi (2,388.93 km) |
| Monticello to Ojus (Florida) | 1,535.46 mi (2,471.08 km) |
| Monticello to Okemos (Michigan) | 499.34 mi (803.61 km) |
| Monticello to Oklahoma City (Oklahoma) | 706.64 mi (1,137.23 km) |
| Monticello to Okmulgee (Oklahoma) | 679.13 mi (1,092.95 km) |
| Monticello to Olathe (Kansas) | 446.35 mi (718.34 km) |
| Monticello to Old Jamestown (Missouri) | 481.23 mi (774.46 km) |
| Monticello to Oldsmar (Florida) | 1,338.86 mi (2,154.69 km) |
| Monticello to Olean (New York) | 797.87 mi (1,284.05 km) |
| Monticello to Olive Branch (Mississippi) | 743.93 mi (1,197.25 km) |
| Monticello to Olivehurst (California) | 1,476.14 mi (2,375.62 km) |
| Monticello to Olney (Maryland) | 953.15 mi (1,533.95 km) |
| Monticello to Olympia (Washington) | 1,389.34 mi (2,235.92 km) |
