| Isabela to Ridgeland (Mississippi) | 1,727.51 mi (2,780.17 km) |
| Isabela to Ridgewood (New Jersey) | 1,609.16 mi (2,589.69 km) |
| Isabela to Rifle (Colorado) | 2,824.85 mi (4,546.15 km) |
| Isabela to Rincon (Georgia) | 1,299.40 mi (2,091.18 km) |
| Isabela to Ringwood (New Jersey) | 1,619.89 mi (2,606.95 km) |
| Isabela to Río Grande (Puerto Rico) | 78.00 mi (125.52 km) |
| Isabela to Rio Grande City (Texas) | 2,096.39 mi (3,373.81 km) |
| Isabela to Rio Linda (California) | 3,525.24 mi (5,673.33 km) |
| Isabela to Rio Rancho (New Mexico) | 2,682.45 mi (4,316.99 km) |
| Isabela to Rio Rico (Arizona) | 2,874.48 mi (4,626.03 km) |
| Isabela to Ripon (California) | 3,500.63 mi (5,633.72 km) |
| Isabela to River Edge (New Jersey) | 1,604.38 mi (2,581.99 km) |
| Isabela to River Falls (Wisconsin) | 2,342.30 mi (3,769.57 km) |
| Isabela to River Forest (Illinois) | 2,026.71 mi (3,261.68 km) |
| Isabela to River Grove (Illinois) | 2,028.84 mi (3,265.10 km) |
