| Longford to Oerlinghausen | 696.16 mi (1,120.36 km) |
| Longford to Oestrich-Winkel | 719.76 mi (1,158.34 km) |
| Longford to Offenburg | 771.06 mi (1,240.90 km) |
| Longford to Oftersheim | 763.36 mi (1,228.52 km) |
| Longford to Ohrdruf | 806.08 mi (1,297.26 km) |
| Longford to Ohringen | 805.09 mi (1,295.66 km) |
| Longford to Olbernhau | 915.93 mi (1,474.04 km) |
| Longford to Olching | 911.58 mi (1,467.05 km) |
| Longford to Oldenburg | 658.96 mi (1,060.50 km) |
| Longford to Oldenburg in Holstein | 757.32 mi (1,218.79 km) |
| Longford to Olfen | 649.05 mi (1,044.54 km) |
| Longford to Olpe | 683.94 mi (1,100.70 km) |
| Longford to Olsberg | 702.02 mi (1,129.79 km) |
| Longford to Oranienburg | 869.24 mi (1,398.90 km) |
| Longford to Ortenberg | 751.13 mi (1,208.82 km) |
