| Canals to Oakley (California) | 5,939.31 mi (9,558.40 km) |
| Canals to Oakton (Virginia) | 3,989.15 mi (6,419.91 km) |
| Canals to Oakville (Missouri) | 4,616.03 mi (7,428.79 km) |
| Canals to Oatfield (Oregon) | 5,588.35 mi (8,993.58 km) |
| Canals to Ocala (Florida) | 4,562.80 mi (7,343.12 km) |
| Canals to Ocean Acres (New Jersey) | 3,818.02 mi (6,144.51 km) |
| Canals to Ocean City (New Jersey) | 3,847.41 mi (6,191.80 km) |
| Canals to Ocean Pines (Maryland) | 3,900.27 mi (6,276.87 km) |
| Canals to Ocean Pointe (Hawaii) | 8,023.84 mi (12,913.12 km) |
| Canals to Ocean Springs (Mississippi) | 4,847.90 mi (7,801.95 km) |
| Canals to Oceanside (California) | 6,012.33 mi (9,675.91 km) |
| Canals to Oceanside (New York) | 3,761.72 mi (6,053.91 km) |
| Canals to Ocoee (Florida) | 4,553.69 mi (7,328.45 km) |
| Canals to Oconomowoc (Wisconsin) | 4,369.07 mi (7,031.34 km) |
| Canals to Odenton (Maryland) | 3,954.45 mi (6,364.07 km) |
