| Richmond Hill to Olympia (Washington) | 2,415.92 mi (3,888.05 km) |
| Richmond Hill to Olympia Heights (Florida) | 430.85 mi (693.38 km) |
| Richmond Hill to Omaha (Nebraska) | 1,040.17 mi (1,673.99 km) |
| Richmond Hill to On Top of the World Designated Place (Florida) | 201.66 mi (324.54 km) |
| Richmond Hill to Onalaska (Wisconsin) | 986.80 mi (1,588.10 km) |
| Richmond Hill to Oneida (New York) | 831.46 mi (1,338.11 km) |
| Richmond Hill to Oneonta (New York) | 805.61 mi (1,296.51 km) |
| Richmond Hill to Ontario (California) | 2,098.04 mi (3,376.47 km) |
| Richmond Hill to Ontario (Oregon) | 2,094.98 mi (3,371.54 km) |
| Richmond Hill to Opa-locka (Florida) | 419.56 mi (675.21 km) |
| Richmond Hill to Opelika (Alabama) | 243.14 mi (391.29 km) |
| Richmond Hill to Opelousas (Louisiana) | 643.15 mi (1,035.04 km) |
| Richmond Hill to Orange (California) | 2,112.15 mi (3,399.17 km) |
| Richmond Hill to Orange (Texas) | 746.88 mi (1,201.98 km) |
| Richmond Hill to Orange City (Florida) | 204.96 mi (329.86 km) |
