| Castelnaudary to Odessa (Texas) | 5,381.85 mi (8,661.24 km) |
| Castelnaudary to Ogden (Utah) | 5,298.60 mi (8,527.27 km) |
| Castelnaudary to Oildale (California) | 5,851.67 mi (9,417.35 km) |
| Castelnaudary to Ojus (Florida) | 4,632.31 mi (7,454.97 km) |
| Castelnaudary to Okemos (Michigan) | 4,149.37 mi (6,677.77 km) |
| Castelnaudary to Oklahoma City (Oklahoma) | 5,009.68 mi (8,062.30 km) |
| Castelnaudary to Okmulgee (Oklahoma) | 4,939.03 mi (7,948.59 km) |
| Castelnaudary to Olathe (Kansas) | 4,744.14 mi (7,634.96 km) |
| Castelnaudary to Old Jamestown (Missouri) | 4,554.20 mi (7,329.27 km) |
| Castelnaudary to Oldsmar (Florida) | 4,663.40 mi (7,505.01 km) |
| Castelnaudary to Olean (New York) | 3,913.12 mi (6,297.56 km) |
| Castelnaudary to Olive Branch (Mississippi) | 4,699.31 mi (7,562.80 km) |
| Castelnaudary to Olivehurst (California) | 5,739.51 mi (9,236.85 km) |
| Castelnaudary to Olney (Maryland) | 3,957.71 mi (6,369.33 km) |
| Castelnaudary to Olympia (Washington) | 5,345.29 mi (8,602.41 km) |
