| Round Rock to Rosolini | 6,063.08 mi (9,757.58 km) |
| Round Rock to Rossano | 6,019.12 mi (9,686.84 km) |
| Round Rock to Rottofreno | 5,504.05 mi (8,857.92 km) |
| Round Rock to Rovato | 5,502.97 mi (8,856.18 km) |
| Round Rock to Roverbella | 5,545.48 mi (8,924.58 km) |
| Round Rock to Rovereto | 5,532.99 mi (8,904.48 km) |
| Round Rock to Rovigo | 5,594.04 mi (9,002.73 km) |
| Round Rock to Rozzano | 5,475.52 mi (8,811.99 km) |
| Round Rock to Rubano | 5,579.77 mi (8,979.77 km) |
| Round Rock to Rubiera | 5,570.00 mi (8,964.05 km) |
| Round Rock to Ruffano | 6,068.17 mi (9,765.77 km) |
| Round Rock to Russi | 5,631.46 mi (9,062.97 km) |
| Round Rock to Rutigliano | 5,971.74 mi (9,610.58 km) |
| Round Rock to Ruvo di Puglia | 5,946.83 mi (9,570.50 km) |
| Round Rock to Sabaudia | 5,795.54 mi (9,327.01 km) |
