| North Tonawanda to Oerlinghausen | 3,879.58 mi (6,243.59 km) |
| North Tonawanda to Oestrich-Winkel | 3,919.73 mi (6,308.20 km) |
| North Tonawanda to Offenburg | 3,969.50 mi (6,388.29 km) |
| North Tonawanda to Oftersheim | 3,963.92 mi (6,379.31 km) |
| North Tonawanda to Ohrdruf | 3,995.79 mi (6,430.60 km) |
| North Tonawanda to Ohringen | 4,005.50 mi (6,446.23 km) |
| North Tonawanda to Olbernhau | 4,098.89 mi (6,596.53 km) |
| North Tonawanda to Olching | 4,112.17 mi (6,617.89 km) |
| North Tonawanda to Oldenburg | 3,824.63 mi (6,155.15 km) |
| North Tonawanda to Oldenburg in Holstein | 3,883.59 mi (6,250.04 km) |
| North Tonawanda to Olfen | 3,839.43 mi (6,178.97 km) |
| North Tonawanda to Olpe | 3,879.39 mi (6,243.28 km) |
| North Tonawanda to Olsberg | 3,893.07 mi (6,265.29 km) |
| North Tonawanda to Oranienburg | 4,020.38 mi (6,470.18 km) |
| North Tonawanda to Ortenberg | 3,948.33 mi (6,354.23 km) |
