| Southborough to Marshall (Minnesota) | 4,153.75 mi (6,684.82 km) |
| Southborough to Marshall (Missouri) | 4,317.35 mi (6,948.11 km) |
| Southborough to Marshall (Texas) | 4,690.81 mi (7,549.14 km) |
| Southborough to Marshalltown (Iowa) | 4,164.97 mi (6,702.87 km) |
| Southborough to Marshfield (Wisconsin) | 3,940.85 mi (6,342.19 km) |
| Southborough to Martha Lake (Washington) | 4,797.27 mi (7,720.46 km) |
| Southborough to Martin (Tennessee) | 4,284.42 mi (6,895.11 km) |
| Southborough to Martinez (California) | 5,361.19 mi (8,628.00 km) |
| Southborough to Martinez (Georgia) | 4,147.35 mi (6,674.51 km) |
| Southborough to Martinsburg (West Virginia) | 3,702.18 mi (5,958.08 km) |
| Southborough to Martinsville (Indiana) | 4,042.12 mi (6,505.16 km) |
| Southborough to Martinsville (New Jersey) | 3,512.96 mi (5,653.57 km) |
| Southborough to Martinsville (Virginia) | 3,905.74 mi (6,285.69 km) |
| Southborough to Maryland City (Maryland) | 3,670.20 mi (5,906.62 km) |
| Southborough to Maryland Heights (Missouri) | 4,232.45 mi (6,811.48 km) |
