| Willoughby to Orangeburg (South Carolina) | 564.10 mi (907.83 km) |
| Willoughby to Orangevale (California) | 2,093.26 mi (3,368.78 km) |
| Willoughby to Orchards (Washington) | 2,051.23 mi (3,301.13 km) |
| Willoughby to Orcutt (California) | 2,148.64 mi (3,457.90 km) |
| Willoughby to Oregon (Ohio) | 104.48 mi (168.14 km) |
| Willoughby to Oregon (Wisconsin) | 417.23 mi (671.47 km) |
| Willoughby to Oregon City (Oregon) | 2,057.30 mi (3,310.90 km) |
| Willoughby to Orem (Utah) | 1,574.82 mi (2,534.42 km) |
| Willoughby to Orinda (California) | 2,160.68 mi (3,477.29 km) |
| Willoughby to Orland Park (Illinois) | 333.23 mi (536.29 km) |
| Willoughby to Orlando (Florida) | 909.87 mi (1,464.30 km) |
| Willoughby to Ormond Beach (Florida) | 853.30 mi (1,373.25 km) |
| Willoughby to Oro Valley (Arizona) | 1,740.32 mi (2,800.77 km) |
| Willoughby to Oroville (California) | 2,093.54 mi (3,369.23 km) |
| Willoughby to Oshkosh (Wisconsin) | 397.74 mi (640.09 km) |
