| Magna to Olympia Heights (Florida) | 2,095.14 mi (3,371.81 km) |
| Magna to Omaha (Nebraska) | 839.24 mi (1,350.63 km) |
| Magna to On Top of the World Designated Place (Florida) | 1,861.71 mi (2,996.14 km) |
| Magna to Onalaska (Wisconsin) | 1,088.74 mi (1,752.16 km) |
| Magna to Oneida (New York) | 1,868.33 mi (3,006.79 km) |
| Magna to Oneonta (New York) | 1,904.54 mi (3,065.06 km) |
| Magna to Ontario (California) | 552.18 mi (888.65 km) |
| Magna to Ontario (Oregon) | 333.37 mi (536.50 km) |
| Magna to Opa-locka (Florida) | 2,091.86 mi (3,366.53 km) |
| Magna to Opelika (Alabama) | 1,577.90 mi (2,539.38 km) |
| Magna to Opelousas (Louisiana) | 1,326.01 mi (2,134.00 km) |
| Magna to Orange (California) | 572.50 mi (921.35 km) |
| Magna to Orange (Texas) | 1,265.81 mi (2,037.12 km) |
| Magna to Orange City (Florida) | 1,918.52 mi (3,087.56 km) |
| Magna to Orangeburg (South Carolina) | 1,784.87 mi (2,872.47 km) |
