| Didcot to Orthez | 561.32 mi (903.35 km) |
| Didcot to Orvault | 299.96 mi (482.74 km) |
| Didcot to Osny | 228.41 mi (367.59 km) |
| Didcot to Ostwald | 449.23 mi (722.97 km) |
| Didcot to Ouistreham | 166.48 mi (267.92 km) |
| Didcot to Oullins | 491.45 mi (790.91 km) |
| Didcot to Outreau | 137.75 mi (221.68 km) |
| Didcot to Oyonnax | 483.96 mi (778.86 km) |
| Didcot to Ozoir-la-Ferriere | 261.20 mi (420.35 km) |
| Didcot to Pace | 240.11 mi (386.42 km) |
| Didcot to Palaiseau | 252.39 mi (406.19 km) |
| Didcot to Pamiers | 601.44 mi (967.93 km) |
| Didcot to Panazol | 415.02 mi (667.91 km) |
| Didcot to Pantin | 246.81 mi (397.20 km) |
| Didcot to Paray-le-Monial | 430.82 mi (693.34 km) |
