| Kastamonu to Odessa (Texas) | 6,655.49 mi (10,710.98 km) |
| Kastamonu to Ogden (Utah) | 6,340.45 mi (10,203.96 km) |
| Kastamonu to Oildale (California) | 6,857.23 mi (11,035.65 km) |
| Kastamonu to Ojus (Florida) | 6,156.77 mi (9,908.36 km) |
| Kastamonu to Okemos (Michigan) | 5,470.39 mi (8,803.75 km) |
| Kastamonu to Oklahoma City (Oklahoma) | 6,296.53 mi (10,133.28 km) |
| Kastamonu to Okmulgee (Oklahoma) | 6,239.94 mi (10,042.21 km) |
| Kastamonu to Olathe (Kansas) | 6,018.22 mi (9,685.39 km) |
| Kastamonu to Old Jamestown (Missouri) | 5,872.80 mi (9,451.36 km) |
| Kastamonu to Oldsmar (Florida) | 6,155.43 mi (9,906.21 km) |
| Kastamonu to Olean (New York) | 5,289.51 mi (8,512.65 km) |
| Kastamonu to Olive Branch (Mississippi) | 6,066.98 mi (9,763.86 km) |
| Kastamonu to Olivehurst (California) | 6,665.31 mi (10,726.78 km) |
| Kastamonu to Olney (Maryland) | 5,380.07 mi (8,658.39 km) |
| Kastamonu to Olympia (Washington) | 6,162.20 mi (9,917.10 km) |
