| Glastonbury to Orbetello | 889.52 mi (1,431.54 km) |
| Glastonbury to Oria | 1,218.34 mi (1,960.72 km) |
| Glastonbury to Oristano | 947.86 mi (1,525.43 km) |
| Glastonbury to Orta Nova | 1,106.27 mi (1,780.37 km) |
| Glastonbury to Orte | 929.77 mi (1,496.32 km) |
| Glastonbury to Ortona | 1,008.84 mi (1,623.56 km) |
| Glastonbury to Orvieto | 907.24 mi (1,460.05 km) |
| Glastonbury to Orzinuovi | 702.78 mi (1,131.01 km) |
| Glastonbury to Osimo | 922.05 mi (1,483.90 km) |
| Glastonbury to Ospitaletto | 701.41 mi (1,128.81 km) |
| Glastonbury to Ostuni | 1,205.31 mi (1,939.75 km) |
| Glastonbury to Ottaviano | 1,084.79 mi (1,745.81 km) |
| Glastonbury to Ovada | 690.92 mi (1,111.93 km) |
| Glastonbury to Ozieri | 919.88 mi (1,480.40 km) |
| Glastonbury to Paceco | 1,174.99 mi (1,890.96 km) |
