| Buffalo Grove to Montalegre | 3,951.02 mi (6,358.55 km) |
| Buffalo Grove to Montemor-o-Novo | 4,042.78 mi (6,506.22 km) |
| Buffalo Grove to Montemor-o-Velho | 3,967.84 mi (6,385.62 km) |
| Buffalo Grove to Montijo | 4,010.02 mi (6,453.50 km) |
| Buffalo Grove to Mortagua | 3,979.05 mi (6,403.67 km) |
| Buffalo Grove to Moura | 4,096.83 mi (6,593.21 km) |
| Buffalo Grove to Murtosa | 3,950.50 mi (6,357.72 km) |
| Buffalo Grove to Nazare | 3,970.04 mi (6,389.16 km) |
| Buffalo Grove to Nelas | 3,993.54 mi (6,426.98 km) |
| Buffalo Grove to Obidos | 3,974.31 mi (6,396.04 km) |
| Buffalo Grove to Odemira | 4,061.86 mi (6,536.93 km) |
| Buffalo Grove to Odivelas | 3,993.28 mi (6,426.57 km) |
| Buffalo Grove to Oeiras | 3,990.72 mi (6,422.45 km) |
| Buffalo Grove to Olhao | 4,119.17 mi (6,629.17 km) |
| Buffalo Grove to Oliveira de Azemeis | 3,954.00 mi (6,363.35 km) |
