| Westbrook to Orangeburg (South Carolina) | 903.56 mi (1,454.14 km) |
| Westbrook to Orangevale (California) | 2,625.60 mi (4,225.49 km) |
| Westbrook to Orchards (Washington) | 2,520.63 mi (4,056.57 km) |
| Westbrook to Orcutt (California) | 2,703.64 mi (4,351.08 km) |
| Westbrook to Oregon (Ohio) | 678.42 mi (1,091.81 km) |
| Westbrook to Oregon (Wisconsin) | 956.39 mi (1,539.15 km) |
| Westbrook to Oregon City (Oregon) | 2,530.27 mi (4,072.07 km) |
| Westbrook to Orem (Utah) | 2,113.88 mi (3,401.96 km) |
| Westbrook to Orinda (California) | 2,696.22 mi (4,339.15 km) |
| Westbrook to Orland Park (Illinois) | 899.58 mi (1,447.74 km) |
| Westbrook to Orlando (Florida) | 1,214.71 mi (1,954.88 km) |
| Westbrook to Ormond Beach (Florida) | 1,157.80 mi (1,863.29 km) |
| Westbrook to Oro Valley (Arizona) | 2,316.53 mi (3,728.10 km) |
| Westbrook to Oroville (California) | 2,619.63 mi (4,215.89 km) |
| Westbrook to Oshkosh (Wisconsin) | 905.55 mi (1,457.34 km) |
