| Glen Cove to Oerlinghausen | 3,779.36 mi (6,082.29 km) |
| Glen Cove to Oestrich-Winkel | 3,807.59 mi (6,127.73 km) |
| Glen Cove to Offenburg | 3,849.07 mi (6,194.48 km) |
| Glen Cove to Oftersheim | 3,849.45 mi (6,195.08 km) |
| Glen Cove to Ohrdruf | 3,892.91 mi (6,265.04 km) |
| Glen Cove to Ohringen | 3,891.78 mi (6,263.22 km) |
| Glen Cove to Olbernhau | 3,999.90 mi (6,437.21 km) |
| Glen Cove to Olching | 3,996.69 mi (6,432.05 km) |
| Glen Cove to Oldenburg | 3,730.29 mi (6,003.32 km) |
| Glen Cove to Oldenburg in Holstein | 3,800.05 mi (6,115.59 km) |
| Glen Cove to Olfen | 3,735.69 mi (6,012.02 km) |
| Glen Cove to Olpe | 3,772.51 mi (6,071.27 km) |
| Glen Cove to Olsberg | 3,789.12 mi (6,098.01 km) |
| Glen Cove to Oranienburg | 3,932.25 mi (6,328.34 km) |
| Glen Cove to Ortenberg | 3,839.96 mi (6,179.82 km) |
