| Mainburg to Olympia Heights (Florida) | 4,996.47 mi (8,041.04 km) |
| Mainburg to Omaha (Nebraska) | 4,832.50 mi (7,777.15 km) |
| Mainburg to On Top of the World Designated Place (Florida) | 4,911.42 mi (7,904.16 km) |
| Mainburg to Onalaska (Wisconsin) | 4,531.30 mi (7,292.42 km) |
| Mainburg to Oneida (New York) | 3,987.34 mi (6,417.00 km) |
| Mainburg to Oneonta (New York) | 3,990.63 mi (6,422.30 km) |
| Mainburg to Ontario (California) | 5,929.96 mi (9,543.35 km) |
| Mainburg to Ontario (Oregon) | 5,322.73 mi (8,566.11 km) |
| Mainburg to Opa-locka (Florida) | 4,984.11 mi (8,021.15 km) |
| Mainburg to Opelika (Alabama) | 4,862.71 mi (7,825.78 km) |
| Mainburg to Opelousas (Louisiana) | 5,238.88 mi (8,431.16 km) |
| Mainburg to Orange (California) | 5,950.26 mi (9,576.02 km) |
| Mainburg to Orange (Texas) | 5,325.67 mi (8,570.83 km) |
| Mainburg to Orange City (Florida) | 4,877.77 mi (7,850.01 km) |
| Mainburg to Orangeburg (South Carolina) | 4,637.65 mi (7,463.58 km) |
