| Ponca City to Montalegre | 4,562.12 mi (7,342.03 km) |
| Ponca City to Montemor-o-Novo | 4,649.53 mi (7,482.69 km) |
| Ponca City to Montemor-o-Velho | 4,576.52 mi (7,365.20 km) |
| Ponca City to Montijo | 4,616.32 mi (7,429.25 km) |
| Ponca City to Mortagua | 4,588.35 mi (7,384.23 km) |
| Ponca City to Moura | 4,703.33 mi (7,569.27 km) |
| Ponca City to Murtosa | 4,559.96 mi (7,338.55 km) |
| Ponca City to Nazare | 4,577.66 mi (7,367.04 km) |
| Ponca City to Nelas | 4,603.15 mi (7,408.05 km) |
| Ponca City to Obidos | 4,581.51 mi (7,373.22 km) |
| Ponca City to Odemira | 4,666.49 mi (7,509.99 km) |
| Ponca City to Odivelas | 4,599.55 mi (7,402.27 km) |
| Ponca City to Oeiras | 4,596.71 mi (7,397.70 km) |
| Ponca City to Olhao | 4,723.49 mi (7,601.72 km) |
| Ponca City to Oliveira de Azemeis | 4,563.68 mi (7,344.53 km) |
