| Great Yarmouth to Orbetello | 828.63 mi (1,333.55 km) |
| Great Yarmouth to Oria | 1,122.28 mi (1,806.13 km) |
| Great Yarmouth to Oristano | 935.70 mi (1,505.87 km) |
| Great Yarmouth to Orta Nova | 1,016.92 mi (1,636.58 km) |
| Great Yarmouth to Orte | 857.44 mi (1,379.92 km) |
| Great Yarmouth to Ortona | 920.44 mi (1,481.31 km) |
| Great Yarmouth to Orvieto | 834.91 mi (1,343.66 km) |
| Great Yarmouth to Orzinuovi | 620.60 mi (998.75 km) |
| Great Yarmouth to Osimo | 829.82 mi (1,335.46 km) |
| Great Yarmouth to Ospitaletto | 615.53 mi (990.61 km) |
| Great Yarmouth to Ostuni | 1,107.79 mi (1,782.81 km) |
| Great Yarmouth to Ottaviano | 1,008.91 mi (1,623.68 km) |
| Great Yarmouth to Ovada | 634.00 mi (1,020.33 km) |
| Great Yarmouth to Ozieri | 898.41 mi (1,445.85 km) |
| Great Yarmouth to Paceco | 1,136.16 mi (1,828.47 km) |
