| Ribeira Grande to Olympia Heights (Florida) | 3,278.99 mi (5,277.02 km) |
| Ribeira Grande to Omaha (Nebraska) | 3,659.84 mi (5,889.95 km) |
| Ribeira Grande to On Top of the World Designated Place (Florida) | 3,277.11 mi (5,274.00 km) |
| Ribeira Grande to Onalaska (Wisconsin) | 3,367.85 mi (5,420.03 km) |
| Ribeira Grande to Oneida (New York) | 2,622.12 mi (4,219.89 km) |
| Ribeira Grande to Oneonta (New York) | 2,599.66 mi (4,183.75 km) |
| Ribeira Grande to Ontario (California) | 4,931.67 mi (7,936.75 km) |
| Ribeira Grande to Ontario (Oregon) | 4,538.82 mi (7,304.52 km) |
| Ribeira Grande to Opa-locka (Florida) | 3,268.59 mi (5,260.28 km) |
| Ribeira Grande to Opelika (Alabama) | 3,339.34 mi (5,374.15 km) |
| Ribeira Grande to Opelousas (Louisiana) | 3,758.98 mi (6,049.49 km) |
| Ribeira Grande to Orange (California) | 4,950.97 mi (7,967.81 km) |
| Ribeira Grande to Orange (Texas) | 3,860.73 mi (6,213.25 km) |
| Ribeira Grande to Orange City (Florida) | 3,228.20 mi (5,195.29 km) |
| Ribeira Grande to Orangeburg (South Carolina) | 3,076.54 mi (4,951.21 km) |
