| Roswell to Olympia (Washington) | 2,186.38 mi (3,518.65 km) |
| Roswell to Olympia Heights (Florida) | 622.61 mi (1,002.00 km) |
| Roswell to Omaha (Nebraska) | 810.45 mi (1,304.29 km) |
| Roswell to On Top of the World Designated Place (Florida) | 361.85 mi (582.34 km) |
| Roswell to Onalaska (Wisconsin) | 773.12 mi (1,244.22 km) |
| Roswell to Oneida (New York) | 780.28 mi (1,255.75 km) |
| Roswell to Oneonta (New York) | 768.40 mi (1,236.61 km) |
| Roswell to Ontario (California) | 1,895.44 mi (3,050.42 km) |
| Roswell to Ontario (Oregon) | 1,866.98 mi (3,004.62 km) |
| Roswell to Opa-locka (Florida) | 613.33 mi (987.06 km) |
| Roswell to Opelika (Alabama) | 112.10 mi (180.41 km) |
| Roswell to Opelousas (Louisiana) | 512.46 mi (824.73 km) |
| Roswell to Orange (California) | 1,910.37 mi (3,074.44 km) |
| Roswell to Orange (Texas) | 613.36 mi (987.11 km) |
| Roswell to Orange City (Florida) | 396.11 mi (637.48 km) |
