| Gig Harbor to Oberkirch | 5,183.33 mi (8,341.77 km) |
| Gig Harbor to Obernburg am Main | 5,131.96 mi (8,259.10 km) |
| Gig Harbor to Obernkirchen | 4,989.08 mi (8,029.14 km) |
| Gig Harbor to Oberschleissheim | 5,282.58 mi (8,501.50 km) |
| Gig Harbor to Oberstdorf | 5,302.52 mi (8,533.58 km) |
| Gig Harbor to Obertraubling | 5,253.35 mi (8,454.45 km) |
| Gig Harbor to Obertshausen | 5,111.43 mi (8,226.06 km) |
| Gig Harbor to Oberursel | 5,097.41 mi (8,203.49 km) |
| Gig Harbor to Ochsenfurt | 5,164.69 mi (8,311.77 km) |
| Gig Harbor to Ochsenhausen | 5,255.33 mi (8,457.63 km) |
| Gig Harbor to Ochtrup | 4,948.56 mi (7,963.94 km) |
| Gig Harbor to Odenthal | 5,014.61 mi (8,070.24 km) |
| Gig Harbor to Oelde | 4,992.34 mi (8,034.40 km) |
| Gig Harbor to Oelsnitz | 5,166.37 mi (8,314.47 km) |
| Gig Harbor to Oer-Erkenschwick | 4,982.54 mi (8,018.63 km) |
