| Comacchio to Oakley (California) | 6,041.34 mi (9,722.59 km) |
| Comacchio to Oakton (Virginia) | 4,385.77 mi (7,058.22 km) |
| Comacchio to Oakville (Missouri) | 4,942.05 mi (7,953.46 km) |
| Comacchio to Oatfield (Oregon) | 5,624.40 mi (9,051.59 km) |
| Comacchio to Ocala (Florida) | 5,028.71 mi (8,092.92 km) |
| Comacchio to Ocean Acres (New Jersey) | 4,220.97 mi (6,792.99 km) |
| Comacchio to Ocean City (New Jersey) | 4,254.13 mi (6,846.36 km) |
| Comacchio to Ocean Pines (Maryland) | 4,314.07 mi (6,942.82 km) |
| Comacchio to Ocean Pointe (Hawaii) | 7,833.97 mi (12,607.55 km) |
| Comacchio to Ocean Springs (Mississippi) | 5,261.46 mi (8,467.50 km) |
| Comacchio to Oceanside (California) | 6,189.66 mi (9,961.29 km) |
| Comacchio to Oceanside (New York) | 4,157.57 mi (6,690.97 km) |
| Comacchio to Ocoee (Florida) | 5,028.66 mi (8,092.85 km) |
| Comacchio to Oconomowoc (Wisconsin) | 4,656.26 mi (7,493.53 km) |
| Comacchio to Odenton (Maryland) | 4,352.36 mi (7,004.45 km) |
