| Round Rock to Massarosa | 5,581.80 mi (8,983.03 km) |
| Round Rock to Matelica | 5,715.89 mi (9,198.83 km) |
| Round Rock to Matera | 5,970.80 mi (9,609.07 km) |
| Round Rock to Matino | 6,061.20 mi (9,754.55 km) |
| Round Rock to Mazzarino | 6,009.95 mi (9,672.08 km) |
| Round Rock to Meda | 5,465.55 mi (8,795.96 km) |
| Round Rock to Medesano | 5,539.64 mi (8,915.19 km) |
| Round Rock to Medicina | 5,611.04 mi (9,030.09 km) |
| Round Rock to Meldola | 5,641.76 mi (9,079.53 km) |
| Round Rock to Melegnano | 5,483.51 mi (8,824.86 km) |
| Round Rock to Melendugno | 6,059.21 mi (9,751.35 km) |
| Round Rock to Melfi | 5,917.44 mi (9,523.20 km) |
| Round Rock to Melilli | 6,055.04 mi (9,744.64 km) |
| Round Rock to Melito di Napoli | 5,861.93 mi (9,433.86 km) |
| Round Rock to Melito di Porto Salvo | 6,053.12 mi (9,741.55 km) |
