| Rockwall to Oakleaf Plantation (Florida) | 879.85 mi (1,415.98 km) |
| Rockwall to Oakley (California) | 1,459.22 mi (2,348.39 km) |
| Rockwall to Oakton (Virginia) | 1,144.92 mi (1,842.57 km) |
| Rockwall to Oakville (Missouri) | 513.46 mi (826.34 km) |
| Rockwall to Oatfield (Oregon) | 1,634.54 mi (2,630.54 km) |
| Rockwall to Ocala (Florida) | 883.40 mi (1,421.69 km) |
| Rockwall to Ocean Acres (New Jersey) | 1,316.08 mi (2,118.03 km) |
| Rockwall to Ocean City (New Jersey) | 1,291.73 mi (2,078.83 km) |
| Rockwall to Ocean Pines (Maryland) | 1,250.17 mi (2,011.96 km) |
| Rockwall to Ocean Pointe (Hawaii) | 3,819.38 mi (6,146.70 km) |
| Rockwall to Ocean Springs (Mississippi) | 482.04 mi (775.77 km) |
| Rockwall to Oceanside (California) | 1,206.60 mi (1,941.84 km) |
| Rockwall to Oceanside (New York) | 1,364.74 mi (2,196.34 km) |
| Rockwall to Ocoee (Florida) | 933.34 mi (1,502.07 km) |
| Rockwall to Oconomowoc (Wisconsin) | 824.89 mi (1,327.54 km) |
