| Umbertide to Olympia Heights (Florida) | 5,148.00 mi (8,284.91 km) |
| Umbertide to Omaha (Nebraska) | 5,095.95 mi (8,201.14 km) |
| Umbertide to On Top of the World Designated Place (Florida) | 5,085.10 mi (8,183.68 km) |
| Umbertide to Onalaska (Wisconsin) | 4,791.69 mi (7,711.48 km) |
| Umbertide to Oneida (New York) | 4,204.80 mi (6,766.97 km) |
| Umbertide to Oneonta (New York) | 4,203.43 mi (6,764.77 km) |
| Umbertide to Ontario (California) | 6,231.33 mi (10,028.35 km) |
| Umbertide to Ontario (Oregon) | 5,641.84 mi (9,079.67 km) |
| Umbertide to Opa-locka (Florida) | 5,136.11 mi (8,265.77 km) |
| Umbertide to Opelika (Alabama) | 5,062.25 mi (8,146.90 km) |
| Umbertide to Opelousas (Louisiana) | 5,452.46 mi (8,774.88 km) |
| Umbertide to Orange (California) | 6,251.72 mi (10,061.17 km) |
| Umbertide to Orange (Texas) | 5,543.43 mi (8,921.28 km) |
| Umbertide to Orange City (Florida) | 5,047.10 mi (8,122.52 km) |
| Umbertide to Orangeburg (South Carolina) | 4,825.77 mi (7,766.33 km) |
