| Riverdale to Olympia (Washington) | 2,203.08 mi (3,545.52 km) |
| Riverdale to Olympia Heights (Florida) | 594.15 mi (956.19 km) |
| Riverdale to Omaha (Nebraska) | 830.05 mi (1,335.83 km) |
| Riverdale to On Top of the World Designated Place (Florida) | 332.52 mi (535.14 km) |
| Riverdale to Onalaska (Wisconsin) | 801.23 mi (1,289.46 km) |
| Riverdale to Oneida (New York) | 809.47 mi (1,302.72 km) |
| Riverdale to Oneonta (New York) | 796.52 mi (1,281.87 km) |
| Riverdale to Ontario (California) | 1,897.77 mi (3,054.17 km) |
| Riverdale to Ontario (Oregon) | 1,881.42 mi (3,027.86 km) |
| Riverdale to Opa-locka (Florida) | 585.13 mi (941.68 km) |
| Riverdale to Opelika (Alabama) | 83.78 mi (134.83 km) |
| Riverdale to Opelousas (Louisiana) | 495.72 mi (797.79 km) |
| Riverdale to Orange (California) | 1,912.44 mi (3,077.78 km) |
| Riverdale to Orange (Texas) | 597.79 mi (962.05 km) |
| Riverdale to Orange City (Florida) | 369.15 mi (594.08 km) |
