| Rotterdam to Olympia Heights (Florida) | 4,625.41 mi (7,443.88 km) |
| Rotterdam to Omaha (Nebraska) | 4,440.33 mi (7,146.02 km) |
| Rotterdam to On Top of the World Designated Place (Florida) | 4,532.62 mi (7,294.55 km) |
| Rotterdam to Onalaska (Wisconsin) | 4,138.91 mi (6,660.93 km) |
| Rotterdam to Oneida (New York) | 3,598.37 mi (5,791.02 km) |
| Rotterdam to Oneonta (New York) | 3,602.57 mi (5,797.78 km) |
| Rotterdam to Ontario (California) | 5,546.38 mi (8,926.04 km) |
| Rotterdam to Ontario (Oregon) | 4,947.86 mi (7,962.81 km) |
| Rotterdam to Opa-locka (Florida) | 4,612.90 mi (7,423.74 km) |
| Rotterdam to Opelika (Alabama) | 4,476.73 mi (7,204.59 km) |
| Rotterdam to Opelousas (Louisiana) | 4,849.71 mi (7,804.85 km) |
| Rotterdam to Orange (California) | 5,566.72 mi (8,958.78 km) |
| Rotterdam to Orange (Texas) | 4,935.76 mi (7,943.33 km) |
| Rotterdam to Orange City (Florida) | 4,500.47 mi (7,242.81 km) |
| Rotterdam to Orangeburg (South Carolina) | 4,254.89 mi (6,847.59 km) |
