| Gig Harbor to Oerlinghausen | 4,996.40 mi (8,040.92 km) |
| Gig Harbor to Oestrich-Winkel | 5,095.65 mi (8,200.65 km) |
| Gig Harbor to Offenburg | 5,183.57 mi (8,342.15 km) |
| Gig Harbor to Oftersheim | 5,146.37 mi (8,282.29 km) |
| Gig Harbor to Ohrdruf | 5,110.06 mi (8,223.84 km) |
| Gig Harbor to Ohringen | 5,178.06 mi (8,333.29 km) |
| Gig Harbor to Olbernhau | 5,176.62 mi (8,330.97 km) |
| Gig Harbor to Olching | 5,279.81 mi (8,497.03 km) |
| Gig Harbor to Oldenburg | 4,917.61 mi (7,914.13 km) |
| Gig Harbor to Oldenburg in Holstein | 4,907.89 mi (7,898.48 km) |
| Gig Harbor to Olfen | 4,981.33 mi (8,016.68 km) |
| Gig Harbor to Olpe | 5,032.49 mi (8,099.01 km) |
| Gig Harbor to Olsberg | 5,028.20 mi (8,092.10 km) |
| Gig Harbor to Oranienburg | 5,048.92 mi (8,125.45 km) |
| Gig Harbor to Ortenberg | 5,099.65 mi (8,207.10 km) |
