| Castel Gandolfo to Orthez | 692.20 mi (1,113.99 km) |
| Castel Gandolfo to Orvault | 798.53 mi (1,285.11 km) |
| Castel Gandolfo to Osny | 719.24 mi (1,157.51 km) |
| Castel Gandolfo to Ostwald | 527.86 mi (849.50 km) |
| Castel Gandolfo to Ouistreham | 811.42 mi (1,305.86 km) |
| Castel Gandolfo to Oullins | 477.68 mi (768.75 km) |
| Castel Gandolfo to Outreau | 812.10 mi (1,306.95 km) |
| Castel Gandolfo to Oyonnax | 466.55 mi (750.83 km) |
| Castel Gandolfo to Ozoir-la-Ferriere | 685.34 mi (1,102.94 km) |
| Castel Gandolfo to Pace | 830.58 mi (1,336.68 km) |
| Castel Gandolfo to Palaiseau | 697.51 mi (1,122.54 km) |
| Castel Gandolfo to Pamiers | 570.52 mi (918.16 km) |
| Castel Gandolfo to Panazol | 631.59 mi (1,016.45 km) |
| Castel Gandolfo to Pantin | 700.26 mi (1,126.95 km) |
| Castel Gandolfo to Paray-le-Monial | 533.24 mi (858.16 km) |
