| Norristown to Montalegre | 3,431.04 mi (5,521.72 km) |
| Norristown to Montemor-o-Novo | 3,496.58 mi (5,627.21 km) |
| Norristown to Montemor-o-Velho | 3,431.80 mi (5,522.95 km) |
| Norristown to Montijo | 3,462.00 mi (5,571.55 km) |
| Norristown to Mortagua | 3,446.47 mi (5,546.55 km) |
| Norristown to Moura | 3,549.19 mi (5,711.88 km) |
| Norristown to Murtosa | 3,419.10 mi (5,502.52 km) |
| Norristown to Nazare | 3,428.45 mi (5,517.55 km) |
| Norristown to Nelas | 3,462.77 mi (5,572.79 km) |
| Norristown to Obidos | 3,430.60 mi (5,521.01 km) |
| Norristown to Odemira | 3,506.66 mi (5,643.43 km) |
| Norristown to Odivelas | 3,445.22 mi (5,544.55 km) |
| Norristown to Oeiras | 3,441.46 mi (5,538.49 km) |
| Norristown to Olhao | 3,562.47 mi (5,733.24 km) |
| Norristown to Oliveira de Azemeis | 3,423.93 mi (5,510.29 km) |
