| Clearfield to Oerlinghausen | 5,091.40 mi (8,193.82 km) |
| Clearfield to Oestrich-Winkel | 5,172.01 mi (8,323.55 km) |
| Clearfield to Offenburg | 5,248.20 mi (8,446.17 km) |
| Clearfield to Oftersheim | 5,221.77 mi (8,403.62 km) |
| Clearfield to Ohrdruf | 5,209.38 mi (8,383.68 km) |
| Clearfield to Ohringen | 5,258.03 mi (8,461.97 km) |
| Clearfield to Olbernhau | 5,291.06 mi (8,515.14 km) |
| Clearfield to Olching | 5,364.45 mi (8,633.24 km) |
| Clearfield to Oldenburg | 5,018.75 mi (8,076.90 km) |
| Clearfield to Oldenburg in Holstein | 5,032.98 mi (8,099.79 km) |
| Clearfield to Olfen | 5,066.80 mi (8,154.22 km) |
| Clearfield to Olpe | 5,115.40 mi (8,232.44 km) |
| Clearfield to Olsberg | 5,117.53 mi (8,235.87 km) |
| Clearfield to Oranienburg | 5,176.95 mi (8,331.49 km) |
| Clearfield to Ortenberg | 5,185.18 mi (8,344.74 km) |
