| Hertford to Manerbio | 643.24 mi (1,035.20 km) |
| Hertford to Manfredonia | 1,028.88 mi (1,655.83 km) |
| Hertford to Maniago | 696.96 mi (1,121.65 km) |
| Hertford to Mantova | 675.69 mi (1,087.42 km) |
| Hertford to Maranello | 710.05 mi (1,142.72 km) |
| Hertford to Marano di Napoli | 1,011.02 mi (1,627.08 km) |
| Hertford to Marano Vicentino | 671.30 mi (1,080.35 km) |
| Hertford to Marcianise | 1,007.39 mi (1,621.24 km) |
| Hertford to Marcon | 708.97 mi (1,140.98 km) |
| Hertford to Mareno di Piave | 697.82 mi (1,123.03 km) |
| Hertford to Margherita di Savoia | 1,050.69 mi (1,690.91 km) |
| Hertford to Mariano Comense | 595.31 mi (958.06 km) |
| Hertford to Marigliano | 1,017.64 mi (1,637.73 km) |
| Hertford to Marino | 915.93 mi (1,474.05 km) |
| Hertford to Marostica | 677.04 mi (1,089.58 km) |
