| Mountain Ash to Orthez | 578.91 mi (931.66 km) |
| Mountain Ash to Orvault | 314.70 mi (506.46 km) |
| Mountain Ash to Osny | 300.42 mi (483.49 km) |
| Mountain Ash to Ostwald | 536.24 mi (862.99 km) |
| Mountain Ash to Ouistreham | 215.31 mi (346.51 km) |
| Mountain Ash to Oullins | 555.52 mi (894.02 km) |
| Mountain Ash to Outreau | 225.63 mi (363.12 km) |
| Mountain Ash to Oyonnax | 554.64 mi (892.61 km) |
| Mountain Ash to Ozoir-la-Ferriere | 334.43 mi (538.22 km) |
| Mountain Ash to Pace | 254.36 mi (409.36 km) |
| Mountain Ash to Palaiseau | 322.20 mi (518.53 km) |
| Mountain Ash to Pamiers | 635.76 mi (1,023.16 km) |
| Mountain Ash to Panazol | 456.47 mi (734.62 km) |
| Mountain Ash to Pantin | 319.45 mi (514.10 km) |
| Mountain Ash to Paray-le-Monial | 495.31 mi (797.12 km) |
