| Manching to Olympia Heights (Florida) | 4,982.59 mi (8,018.70 km) |
| Manching to Omaha (Nebraska) | 4,819.48 mi (7,756.20 km) |
| Manching to On Top of the World Designated Place (Florida) | 4,897.55 mi (7,881.84 km) |
| Manching to Onalaska (Wisconsin) | 4,518.21 mi (7,271.35 km) |
| Manching to Oneida (New York) | 3,973.68 mi (6,395.02 km) |
| Manching to Oneonta (New York) | 3,976.93 mi (6,400.25 km) |
| Manching to Ontario (California) | 5,917.94 mi (9,524.00 km) |
| Manching to Ontario (Oregon) | 5,311.34 mi (8,547.77 km) |
| Manching to Opa-locka (Florida) | 4,970.23 mi (7,998.81 km) |
| Manching to Opelika (Alabama) | 4,848.95 mi (7,803.62 km) |
| Manching to Opelousas (Louisiana) | 5,225.22 mi (8,409.18 km) |
| Manching to Orange (California) | 5,938.24 mi (9,556.67 km) |
| Manching to Orange (Texas) | 5,312.05 mi (8,548.91 km) |
| Manching to Orange City (Florida) | 4,863.89 mi (7,827.67 km) |
| Manching to Orangeburg (South Carolina) | 4,623.83 mi (7,441.33 km) |
