| Buckingham to Oerlinghausen | 410.49 mi (660.61 km) |
| Buckingham to Oestrich-Winkel | 414.02 mi (666.30 km) |
| Buckingham to Offenburg | 463.03 mi (745.17 km) |
| Buckingham to Oftersheim | 456.09 mi (734.01 km) |
| Buckingham to Ohrdruf | 510.84 mi (822.11 km) |
| Buckingham to Ohringen | 498.21 mi (801.80 km) |
| Buckingham to Olbernhau | 623.90 mi (1,004.08 km) |
| Buckingham to Olching | 604.02 mi (972.07 km) |
| Buckingham to Oldenburg | 394.12 mi (634.28 km) |
| Buckingham to Oldenburg in Holstein | 516.26 mi (830.84 km) |
| Buckingham to Olfen | 357.48 mi (575.31 km) |
| Buckingham to Olpe | 385.01 mi (619.61 km) |
| Buckingham to Olsberg | 407.89 mi (656.44 km) |
| Buckingham to Oranienburg | 601.24 mi (967.60 km) |
| Buckingham to Ortenberg | 449.06 mi (722.69 km) |
