| Mountlake Terrace to Octeville | 4,835.11 mi (7,781.35 km) |
| Mountlake Terrace to Oignies | 4,911.38 mi (7,904.11 km) |
| Mountlake Terrace to Oissel | 4,924.90 mi (7,925.86 km) |
| Mountlake Terrace to Olivet | 5,029.28 mi (8,093.84 km) |
| Mountlake Terrace to Ollioules | 5,406.61 mi (8,701.09 km) |
| Mountlake Terrace to Olonne-sur-Mer | 5,000.50 mi (8,047.53 km) |
| Mountlake Terrace to Oloron-Sainte-Marie | 5,219.64 mi (8,400.20 km) |
| Mountlake Terrace to Onet Village | 5,246.16 mi (8,442.87 km) |
| Mountlake Terrace to Onnaing | 4,931.33 mi (7,936.20 km) |
| Mountlake Terrace to Orange | 5,320.48 mi (8,562.48 km) |
| Mountlake Terrace to Orchies | 4,917.45 mi (7,913.87 km) |
| Mountlake Terrace to Orleans | 5,027.34 mi (8,090.72 km) |
| Mountlake Terrace to Orly | 4,992.92 mi (8,035.33 km) |
| Mountlake Terrace to Ormesson-sur-Marne | 4,994.40 mi (8,037.71 km) |
| Mountlake Terrace to Orsay | 4,990.06 mi (8,030.73 km) |
