| Portland to Mechernich | 5,136.49 mi (8,266.38 km) |
| Portland to Meckenbeuren | 5,376.18 mi (8,652.13 km) |
| Portland to Meckenheim | 5,143.61 mi (8,277.84 km) |
| Portland to Meerane | 5,258.20 mi (8,462.25 km) |
| Portland to Meerbusch | 5,098.85 mi (8,205.81 km) |
| Portland to Meine | 5,124.77 mi (8,247.52 km) |
| Portland to Meinerzhagen | 5,130.87 mi (8,257.33 km) |
| Portland to Meiningen | 5,229.57 mi (8,416.18 km) |
| Portland to Meissen | 5,261.79 mi (8,468.03 km) |
| Portland to Meitingen | 5,358.02 mi (8,622.89 km) |
| Portland to Melle | 5,084.99 mi (8,183.50 km) |
| Portland to Melsungen | 5,175.32 mi (8,328.87 km) |
| Portland to Memmelsdorf | 5,278.31 mi (8,494.62 km) |
| Portland to Memmingen | 5,374.45 mi (8,649.34 km) |
| Portland to Mendig | 5,164.93 mi (8,312.15 km) |
