| Montecatini Terme to Orangevale (California) | 5,993.00 mi (9,644.81 km) |
| Montecatini Terme to Orchards (Washington) | 5,619.52 mi (9,043.75 km) |
| Montecatini Terme to Orcutt (California) | 6,191.36 mi (9,964.03 km) |
| Montecatini Terme to Oregon (Ohio) | 4,497.14 mi (7,237.45 km) |
| Montecatini Terme to Oregon (Wisconsin) | 4,679.61 mi (7,531.11 km) |
| Montecatini Terme to Oregon City (Oregon) | 5,641.45 mi (9,079.03 km) |
| Montecatini Terme to Orem (Utah) | 5,609.50 mi (9,027.62 km) |
| Montecatini Terme to Orinda (California) | 6,067.88 mi (9,765.31 km) |
| Montecatini Terme to Orland Park (Illinois) | 4,677.87 mi (7,528.30 km) |
| Montecatini Terme to Orlando (Florida) | 4,982.22 mi (8,018.12 km) |
| Montecatini Terme to Ormond Beach (Florida) | 4,934.43 mi (7,941.21 km) |
| Montecatini Terme to Oro Valley (Arizona) | 6,014.42 mi (9,679.28 km) |
| Montecatini Terme to Oroville (California) | 5,955.46 mi (9,584.38 km) |
| Montecatini Terme to Oshkosh (Wisconsin) | 4,599.34 mi (7,401.92 km) |
| Montecatini Terme to Oskaloosa (Iowa) | 4,879.40 mi (7,852.63 km) |
