| Middle River to Odessa (Texas) | 1,538.07 mi (2,475.28 km) |
| Middle River to Ogden (Utah) | 1,864.80 mi (3,001.11 km) |
| Middle River to Oildale (California) | 2,332.91 mi (3,754.46 km) |
| Middle River to Ojus (Florida) | 949.90 mi (1,528.72 km) |
| Middle River to Okemos (Michigan) | 476.51 mi (766.87 km) |
| Middle River to Oklahoma City (Oklahoma) | 1,185.04 mi (1,907.14 km) |
| Middle River to Okmulgee (Oklahoma) | 1,101.77 mi (1,773.13 km) |
| Middle River to Olathe (Kansas) | 984.94 mi (1,585.11 km) |
| Middle River to Old Jamestown (Missouri) | 743.31 mi (1,196.25 km) |
| Middle River to Oldsmar (Florida) | 858.29 mi (1,381.28 km) |
| Middle River to Olean (New York) | 216.41 mi (348.28 km) |
| Middle River to Olive Branch (Mississippi) | 797.72 mi (1,283.80 km) |
| Middle River to Olivehurst (California) | 2,390.32 mi (3,846.84 km) |
| Middle River to Olney (Maryland) | 37.16 mi (59.81 km) |
| Middle River to Olympia (Washington) | 2,363.97 mi (3,804.44 km) |
