| Portland to Mombris | 5,228.39 mi (8,414.27 km) |
| Portland to Monchengladbach | 5,096.94 mi (8,202.74 km) |
| Portland to Monschau | 5,129.02 mi (8,254.36 km) |
| Portland to Montabaur | 5,174.61 mi (8,327.72 km) |
| Portland to Moosburg | 5,387.91 mi (8,671.00 km) |
| Portland to Morbach | 5,192.89 mi (8,357.15 km) |
| Portland to Morfelden-Walldorf | 5,218.24 mi (8,397.95 km) |
| Portland to Morlenbach | 5,245.23 mi (8,441.38 km) |
| Portland to Morsbach | 5,147.25 mi (8,283.70 km) |
| Portland to Mosbach | 5,269.51 mi (8,480.46 km) |
| Portland to Mosigkau | 5,194.84 mi (8,360.29 km) |
| Portland to Mossingen | 5,322.46 mi (8,565.67 km) |
| Portland to Much | 5,136.72 mi (8,266.74 km) |
| Portland to Mucheln | 5,216.85 mi (8,395.70 km) |
| Portland to Muhlacker | 5,285.45 mi (8,506.11 km) |
