| Middle River to Portage (Michigan) | 518.25 mi (834.04 km) |
| Middle River to Portage (Wisconsin) | 734.17 mi (1,181.54 km) |
| Middle River to Portales (New Mexico) | 1,526.77 mi (2,457.09 km) |
| Middle River to Porterville (California) | 2,318.67 mi (3,731.54 km) |
| Middle River to Portland (Maine) | 436.84 mi (703.02 km) |
| Middle River to Portland (Oregon) | 2,361.94 mi (3,801.18 km) |
| Middle River to Portland (Tennessee) | 581.60 mi (936.00 km) |
| Middle River to Portland (Texas) | 1,433.88 mi (2,307.60 km) |
| Middle River to Portsmouth (New Hampshire) | 389.60 mi (626.99 km) |
| Middle River to Portsmouth (Ohio) | 352.10 mi (566.65 km) |
| Middle River to Portsmouth (Virginia) | 172.56 mi (277.70 km) |
| Middle River to Post Falls (Idaho) | 2,084.06 mi (3,353.98 km) |
| Middle River to Potomac (Maryland) | 47.06 mi (75.74 km) |
| Middle River to Potomac Park (California) | 2,330.96 mi (3,751.31 km) |
| Middle River to Pottstown (Pennsylvania) | 75.15 mi (120.94 km) |
