| Tigard to Oerlinghausen | 5,116.36 mi (8,233.99 km) |
| Tigard to Oestrich-Winkel | 5,214.13 mi (8,391.33 km) |
| Tigard to Offenburg | 5,301.12 mi (8,531.32 km) |
| Tigard to Oftersheim | 5,264.83 mi (8,472.93 km) |
| Tigard to Ohrdruf | 5,230.51 mi (8,417.70 km) |
| Tigard to Ohringen | 5,296.96 mi (8,524.64 km) |
| Tigard to Olbernhau | 5,298.37 mi (8,526.90 km) |
| Tigard to Olching | 5,399.23 mi (8,689.22 km) |
| Tigard to Oldenburg | 5,037.99 mi (8,107.86 km) |
| Tigard to Oldenburg in Holstein | 5,030.16 mi (8,095.27 km) |
| Tigard to Olfen | 5,100.47 mi (8,208.41 km) |
| Tigard to Olpe | 5,151.47 mi (8,290.48 km) |
| Tigard to Olsberg | 5,147.72 mi (8,284.46 km) |
| Tigard to Oranienburg | 5,171.57 mi (8,322.84 km) |
| Tigard to Ortenberg | 5,218.94 mi (8,399.07 km) |
