| Reno to Olympia (Washington) | 539.74 mi (868.63 km) |
| Reno to Olympia Heights (Florida) | 2,465.08 mi (3,967.17 km) |
| Reno to Omaha (Nebraska) | 1,253.57 mi (2,017.42 km) |
| Reno to On Top of the World Designated Place (Florida) | 2,242.72 mi (3,609.32 km) |
| Reno to Onalaska (Wisconsin) | 1,499.25 mi (2,412.82 km) |
| Reno to Oneida (New York) | 2,279.43 mi (3,668.40 km) |
| Reno to Oneonta (New York) | 2,316.56 mi (3,728.14 km) |
| Reno to Ontario (California) | 400.39 mi (644.36 km) |
| Reno to Ontario (Oregon) | 342.79 mi (551.67 km) |
| Reno to Opa-locka (Florida) | 2,462.92 mi (3,963.69 km) |
| Reno to Opelika (Alabama) | 1,969.33 mi (3,169.33 km) |
| Reno to Opelousas (Louisiana) | 1,681.51 mi (2,706.12 km) |
| Reno to Orange (California) | 412.55 mi (663.93 km) |
| Reno to Orange (Texas) | 1,608.85 mi (2,589.19 km) |
| Reno to Orange City (Florida) | 2,301.25 mi (3,703.51 km) |
