| Butte to Oerlinghausen | 4,833.42 mi (7,778.65 km) |
| Butte to Oestrich-Winkel | 4,920.33 mi (7,918.51 km) |
| Butte to Offenburg | 5,000.67 mi (8,047.80 km) |
| Butte to Oftersheim | 4,970.58 mi (7,999.37 km) |
| Butte to Ohrdruf | 4,950.43 mi (7,966.94 km) |
| Butte to Ohringen | 5,005.46 mi (8,055.51 km) |
| Butte to Olbernhau | 5,027.66 mi (8,091.23 km) |
| Butte to Olching | 5,110.72 mi (8,224.90 km) |
| Butte to Oldenburg | 4,758.59 mi (7,658.21 km) |
| Butte to Oldenburg in Holstein | 4,765.48 mi (7,669.30 km) |
| Butte to Olfen | 4,811.79 mi (7,743.83 km) |
| Butte to Olpe | 4,861.39 mi (7,823.65 km) |
| Butte to Olsberg | 4,861.45 mi (7,823.75 km) |
| Butte to Oranienburg | 4,909.03 mi (7,900.33 km) |
| Butte to Ortenberg | 4,930.56 mi (7,934.97 km) |
