| Johnston to Montalegre | 4,222.88 mi (6,796.07 km) |
| Johnston to Montemor-o-Novo | 4,321.26 mi (6,954.40 km) |
| Johnston to Montemor-o-Velho | 4,243.90 mi (6,829.90 km) |
| Johnston to Montijo | 4,289.04 mi (6,902.54 km) |
| Johnston to Mortagua | 4,254.18 mi (6,846.45 km) |
| Johnston to Moura | 4,375.55 mi (7,041.77 km) |
| Johnston to Murtosa | 4,225.40 mi (6,800.12 km) |
| Johnston to Nazare | 4,247.52 mi (6,835.73 km) |
| Johnston to Nelas | 4,268.15 mi (6,868.93 km) |
| Johnston to Obidos | 4,252.33 mi (6,843.46 km) |
| Johnston to Odemira | 4,342.56 mi (6,988.68 km) |
| Johnston to Odivelas | 4,272.35 mi (6,875.69 km) |
| Johnston to Oeiras | 4,270.10 mi (6,872.06 km) |
| Johnston to Olhao | 4,400.13 mi (7,081.32 km) |
| Johnston to Oliveira de Azemeis | 4,228.54 mi (6,805.18 km) |
