| Midland to Olympia Heights (Florida) | 1,384.59 mi (2,228.28 km) |
| Midland to Omaha (Nebraska) | 720.89 mi (1,160.16 km) |
| Midland to On Top of the World Designated Place (Florida) | 1,194.97 mi (1,923.12 km) |
| Midland to Onalaska (Wisconsin) | 1,010.47 mi (1,626.20 km) |
| Midland to Oneida (New York) | 1,628.10 mi (2,620.18 km) |
| Midland to Oneonta (New York) | 1,643.47 mi (2,644.90 km) |
| Midland to Ontario (California) | 907.19 mi (1,459.98 km) |
| Midland to Ontario (Oregon) | 1,154.85 mi (1,858.56 km) |
| Midland to Opa-locka (Florida) | 1,384.61 mi (2,228.31 km) |
| Midland to Opelika (Alabama) | 977.04 mi (1,572.39 km) |
| Midland to Opelousas (Louisiana) | 601.24 mi (967.60 km) |
| Midland to Orange (California) | 918.40 mi (1,478.01 km) |
| Midland to Orange (Texas) | 511.38 mi (822.99 km) |
| Midland to Orange City (Florida) | 1,256.31 mi (2,021.84 km) |
| Midland to Orangeburg (South Carolina) | 1,236.59 mi (1,990.09 km) |
