| Round Rock to Radauti | 5,993.65 mi (9,645.84 km) |
| Round Rock to Ramnicu Sarat | 6,151.50 mi (9,899.89 km) |
| Round Rock to Ramnicu Valcea | 6,070.75 mi (9,769.93 km) |
| Round Rock to Rasnov | 6,085.80 mi (9,794.14 km) |
| Round Rock to Reghin | 6,003.45 mi (9,661.63 km) |
| Round Rock to Resita | 5,971.98 mi (9,610.97 km) |
| Round Rock to Roman | 6,071.55 mi (9,771.21 km) |
| Round Rock to Rosiori de Vede | 6,139.95 mi (9,881.30 km) |
| Round Rock to Rovinari | 6,036.14 mi (9,714.23 km) |
| Round Rock to Roznov | 6,062.08 mi (9,755.97 km) |
| Round Rock to Sabaoani | 6,064.65 mi (9,760.11 km) |
| Round Rock to Sacele | 6,093.21 mi (9,806.07 km) |
| Round Rock to Sacueni | 5,885.55 mi (9,471.88 km) |
| Round Rock to Salcea | 6,017.93 mi (9,684.93 km) |
| Round Rock to Salonta | 5,895.09 mi (9,487.23 km) |
