| Belfast to Orthez | 801.74 mi (1,290.28 km) |
| Belfast to Orvault | 539.47 mi (868.19 km) |
| Belfast to Osny | 512.06 mi (824.08 km) |
| Belfast to Ostwald | 717.56 mi (1,154.80 km) |
| Belfast to Ouistreham | 439.39 mi (707.13 km) |
| Belfast to Oullins | 774.43 mi (1,246.32 km) |
| Belfast to Outreau | 414.09 mi (666.42 km) |
| Belfast to Oyonnax | 767.55 mi (1,235.26 km) |
| Belfast to Ozoir-la-Ferriere | 544.79 mi (876.75 km) |
| Belfast to Pace | 480.05 mi (772.57 km) |
| Belfast to Palaiseau | 535.93 mi (862.50 km) |
| Belfast to Pamiers | 862.92 mi (1,388.73 km) |
| Belfast to Panazol | 683.69 mi (1,100.30 km) |
| Belfast to Pantin | 530.45 mi (853.68 km) |
| Belfast to Paray-le-Monial | 713.80 mi (1,148.76 km) |
