| Crest Hill to Oerlinghausen | 4,289.26 mi (6,902.90 km) |
| Crest Hill to Oestrich-Winkel | 4,338.98 mi (6,982.91 km) |
| Crest Hill to Offenburg | 4,395.02 mi (7,073.10 km) |
| Crest Hill to Oftersheim | 4,384.79 mi (7,056.64 km) |
| Crest Hill to Ohrdruf | 4,406.99 mi (7,092.36 km) |
| Crest Hill to Ohringen | 4,425.55 mi (7,122.23 km) |
| Crest Hill to Olbernhau | 4,506.19 mi (7,252.01 km) |
| Crest Hill to Olching | 4,533.06 mi (7,295.26 km) |
| Crest Hill to Oldenburg | 4,229.65 mi (6,806.96 km) |
| Crest Hill to Oldenburg in Holstein | 4,278.68 mi (6,885.87 km) |
| Crest Hill to Olfen | 4,252.29 mi (6,843.41 km) |
| Crest Hill to Olpe | 4,294.60 mi (6,911.50 km) |
| Crest Hill to Olsberg | 4,305.78 mi (6,929.48 km) |
| Crest Hill to Oranienburg | 4,418.65 mi (7,111.12 km) |
| Crest Hill to Ortenberg | 4,364.37 mi (7,023.77 km) |
