| Forest Acres to Oerlinghausen | 4,396.96 mi (7,076.22 km) |
| Forest Acres to Oestrich-Winkel | 4,422.35 mi (7,117.08 km) |
| Forest Acres to Offenburg | 4,461.18 mi (7,179.58 km) |
| Forest Acres to Oftersheim | 4,463.47 mi (7,183.26 km) |
| Forest Acres to Ohrdruf | 4,509.86 mi (7,257.92 km) |
| Forest Acres to Ohringen | 4,505.97 mi (7,251.66 km) |
| Forest Acres to Olbernhau | 4,617.54 mi (7,431.21 km) |
| Forest Acres to Olching | 4,610.19 mi (7,419.39 km) |
| Forest Acres to Oldenburg | 4,348.95 mi (6,998.95 km) |
| Forest Acres to Oldenburg in Holstein | 4,419.92 mi (7,113.17 km) |
| Forest Acres to Olfen | 4,352.62 mi (7,004.86 km) |
| Forest Acres to Olpe | 4,388.68 mi (7,062.90 km) |
| Forest Acres to Olsberg | 4,405.95 mi (7,090.69 km) |
| Forest Acres to Oranienburg | 4,551.61 mi (7,325.11 km) |
| Forest Acres to Ortenberg | 4,455.68 mi (7,170.73 km) |
