| Barton upon Irwell to Orbetello | 984.45 mi (1,584.31 km) |
| Barton upon Irwell to Oria | 1,292.30 mi (2,079.76 km) |
| Barton upon Irwell to Oristano | 1,068.90 mi (1,720.23 km) |
| Barton upon Irwell to Orta Nova | 1,184.47 mi (1,906.22 km) |
| Barton upon Irwell to Orte | 1,018.08 mi (1,638.44 km) |
| Barton upon Irwell to Ortona | 1,087.26 mi (1,749.78 km) |
| Barton upon Irwell to Orvieto | 995.40 mi (1,601.95 km) |
| Barton upon Irwell to Orzinuovi | 783.06 mi (1,260.21 km) |
| Barton upon Irwell to Osimo | 997.45 mi (1,605.24 km) |
| Barton upon Irwell to Ospitaletto | 779.31 mi (1,254.18 km) |
| Barton upon Irwell to Ostuni | 1,278.21 mi (2,057.08 km) |
| Barton upon Irwell to Ottaviano | 1,171.70 mi (1,885.66 km) |
| Barton upon Irwell to Ovada | 786.28 mi (1,265.39 km) |
| Barton upon Irwell to Ozieri | 1,036.25 mi (1,667.68 km) |
| Barton upon Irwell to Paceco | 1,283.87 mi (2,066.19 km) |
