| Hessisch Oldendorf to Olympia Heights (Florida) | 4,816.51 mi (7,751.43 km) |
| Hessisch Oldendorf to Omaha (Nebraska) | 4,592.77 mi (7,391.35 km) |
| Hessisch Oldendorf to On Top of the World Designated Place (Florida) | 4,718.82 mi (7,594.21 km) |
| Hessisch Oldendorf to Onalaska (Wisconsin) | 4,293.53 mi (6,909.77 km) |
| Hessisch Oldendorf to Oneida (New York) | 3,773.14 mi (6,072.28 km) |
| Hessisch Oldendorf to Oneonta (New York) | 3,779.00 mi (6,081.72 km) |
| Hessisch Oldendorf to Ontario (California) | 5,673.40 mi (9,130.46 km) |
| Hessisch Oldendorf to Ontario (Oregon) | 5,060.81 mi (8,144.58 km) |
| Hessisch Oldendorf to Opa-locka (Florida) | 4,803.93 mi (7,731.17 km) |
| Hessisch Oldendorf to Opelika (Alabama) | 4,655.68 mi (7,492.60 km) |
| Hessisch Oldendorf to Opelousas (Louisiana) | 5,023.24 mi (8,084.12 km) |
| Hessisch Oldendorf to Orange (California) | 5,693.65 mi (9,163.05 km) |
| Hessisch Oldendorf to Orange (Texas) | 5,107.62 mi (8,219.91 km) |
| Hessisch Oldendorf to Orange City (Florida) | 4,687.80 mi (7,544.29 km) |
| Hessisch Oldendorf to Orangeburg (South Carolina) | 4,437.73 mi (7,141.83 km) |
