| Piqua to Mendota (California) | 1,955.59 mi (3,147.22 km) |
| Piqua to Mendota Heights (Minnesota) | 558.12 mi (898.21 km) |
| Piqua to Menifee (California) | 1,862.02 mi (2,996.63 km) |
| Piqua to Menlo Park (California) | 2,034.68 mi (3,274.50 km) |
| Piqua to Menomonee Falls (Wisconsin) | 288.05 mi (463.57 km) |
| Piqua to Menomonie (Wisconsin) | 509.04 mi (819.23 km) |
| Piqua to Mentor (Ohio) | 185.32 mi (298.25 km) |
| Piqua to Mequon (Wisconsin) | 287.43 mi (462.57 km) |
| Piqua to Merced (California) | 1,949.36 mi (3,137.20 km) |
| Piqua to Mercedes (Texas) | 1,245.99 mi (2,005.23 km) |
| Piqua to Mercer Island (Washington) | 1,939.46 mi (3,121.26 km) |
| Piqua to Mercerville (New Jersey) | 503.95 mi (811.03 km) |
| Piqua to Meriden (Connecticut) | 605.60 mi (974.62 km) |
| Piqua to Meridian (Idaho) | 1,660.67 mi (2,672.59 km) |
| Piqua to Meridian (Mississippi) | 590.75 mi (950.73 km) |
