| Porto Recanati to Olympia Heights (Florida) | 5,206.96 mi (8,379.80 km) |
| Porto Recanati to Omaha (Nebraska) | 5,139.21 mi (8,270.76 km) |
| Porto Recanati to On Top of the World Designated Place (Florida) | 5,141.74 mi (8,274.83 km) |
| Porto Recanati to Onalaska (Wisconsin) | 4,835.43 mi (7,781.87 km) |
| Porto Recanati to Oneida (New York) | 4,255.46 mi (6,848.50 km) |
| Porto Recanati to Oneonta (New York) | 4,254.77 mi (6,847.39 km) |
| Porto Recanati to Ontario (California) | 6,266.30 mi (10,084.64 km) |
| Porto Recanati to Ontario (Oregon) | 5,671.47 mi (9,127.36 km) |
| Porto Recanati to Opa-locka (Florida) | 5,195.02 mi (8,360.58 km) |
| Porto Recanati to Opelika (Alabama) | 5,115.76 mi (8,233.01 km) |
| Porto Recanati to Opelousas (Louisiana) | 5,504.20 mi (8,858.16 km) |
| Porto Recanati to Orange (California) | 6,286.67 mi (10,117.42 km) |
| Porto Recanati to Orange (Texas) | 5,594.60 mi (9,003.64 km) |
| Porto Recanati to Orange City (Florida) | 5,104.20 mi (8,214.41 km) |
| Porto Recanati to Orangeburg (South Carolina) | 4,880.63 mi (7,854.61 km) |
