| Round Rock to Orthez | 5,117.34 mi (8,235.56 km) |
| Round Rock to Orvault | 4,963.93 mi (7,988.67 km) |
| Round Rock to Osny | 5,060.53 mi (8,144.13 km) |
| Round Rock to Ostwald | 5,301.61 mi (8,532.11 km) |
| Round Rock to Ouistreham | 4,960.06 mi (7,982.45 km) |
| Round Rock to Oullins | 5,284.48 mi (8,504.55 km) |
| Round Rock to Outreau | 4,990.09 mi (8,030.77 km) |
| Round Rock to Oyonnax | 5,300.71 mi (8,530.67 km) |
| Round Rock to Ozoir-la-Ferriere | 5,094.39 mi (8,198.62 km) |
| Round Rock to Pace | 4,931.54 mi (7,936.55 km) |
| Round Rock to Palaiseau | 5,078.95 mi (8,173.78 km) |
| Round Rock to Pamiers | 5,235.15 mi (8,425.16 km) |
| Round Rock to Panazol | 5,132.89 mi (8,260.60 km) |
| Round Rock to Pantin | 5,079.37 mi (8,174.45 km) |
| Round Rock to Paray-le-Monial | 5,230.55 mi (8,417.75 km) |
