| Castelginest to Odessa (Texas) | 5,345.88 mi (8,603.37 km) |
| Castelginest to Ogden (Utah) | 5,261.78 mi (8,468.02 km) |
| Castelginest to Oildale (California) | 5,814.86 mi (9,358.11 km) |
| Castelginest to Ojus (Florida) | 4,600.54 mi (7,403.85 km) |
| Castelginest to Okemos (Michigan) | 4,113.48 mi (6,620.01 km) |
| Castelginest to Oklahoma City (Oklahoma) | 4,973.72 mi (8,004.44 km) |
| Castelginest to Okmulgee (Oklahoma) | 4,903.18 mi (7,890.90 km) |
| Castelginest to Olathe (Kansas) | 4,708.02 mi (7,576.82 km) |
| Castelginest to Old Jamestown (Missouri) | 4,518.40 mi (7,271.67 km) |
| Castelginest to Oldsmar (Florida) | 4,630.61 mi (7,452.25 km) |
| Castelginest to Olean (New York) | 3,877.77 mi (6,240.67 km) |
| Castelginest to Olive Branch (Mississippi) | 4,664.12 mi (7,506.17 km) |
| Castelginest to Olivehurst (California) | 5,702.81 mi (9,177.78 km) |
| Castelginest to Olney (Maryland) | 3,923.09 mi (6,313.61 km) |
| Castelginest to Olympia (Washington) | 5,309.04 mi (8,544.07 km) |
