| Mountlake Terrace to Opwijk | 4,913.20 mi (7,907.04 km) |
| Mountlake Terrace to Ostend | 4,866.95 mi (7,832.61 km) |
| Mountlake Terrace to Oud-Heverlee | 4,932.76 mi (7,938.52 km) |
| Mountlake Terrace to Oud-Turnhout | 4,912.99 mi (7,906.70 km) |
| Mountlake Terrace to Oudenaarde | 4,905.25 mi (7,894.23 km) |
| Mountlake Terrace to Oudenburg | 4,871.37 mi (7,839.72 km) |
| Mountlake Terrace to Oupeye | 4,963.88 mi (7,988.60 km) |
| Mountlake Terrace to Overijse | 4,932.31 mi (7,937.78 km) |
| Mountlake Terrace to Overpelt | 4,929.25 mi (7,932.86 km) |
| Mountlake Terrace to Paal | 4,933.46 mi (7,939.63 km) |
| Mountlake Terrace to Peer | 4,934.95 mi (7,942.03 km) |
| Mountlake Terrace to Pepinster | 4,976.24 mi (8,008.49 km) |
| Mountlake Terrace to Peruwelz | 4,923.66 mi (7,923.87 km) |
| Mountlake Terrace to Perwez | 4,948.35 mi (7,963.60 km) |
| Mountlake Terrace to Philippeville | 4,965.94 mi (7,991.90 km) |
