| Houston to Racale | 6,004.60 mi (9,663.47 km) |
| Houston to Racconigi | 5,378.93 mi (8,656.55 km) |
| Houston to Raffadali | 5,908.57 mi (9,508.93 km) |
| Houston to Ragusa | 5,981.57 mi (9,626.41 km) |
| Houston to Ramacca | 5,961.92 mi (9,594.78 km) |
| Houston to Randazzo | 5,953.12 mi (9,580.62 km) |
| Houston to Rapallo | 5,459.25 mi (8,785.82 km) |
| Houston to Ravanusa | 5,933.64 mi (9,549.27 km) |
| Houston to Ravenna | 5,580.96 mi (8,981.69 km) |
| Houston to Recanati | 5,675.69 mi (9,134.14 km) |
| Houston to Recco | 5,455.13 mi (8,779.19 km) |
| Houston to Reggello | 5,580.59 mi (8,981.09 km) |
| Houston to Reggio di Calabria | 5,974.85 mi (9,615.59 km) |
| Houston to Reggio Emilia | 5,505.32 mi (8,859.95 km) |
| Houston to Reggiolo | 5,504.99 mi (8,859.42 km) |
