| Witham to Odessa (Texas) | 5,024.39 mi (8,085.98 km) |
| Witham to Ogden (Utah) | 4,848.74 mi (7,803.29 km) |
| Witham to Oildale (California) | 5,396.54 mi (8,684.88 km) |
| Witham to Ojus (Florida) | 4,446.16 mi (7,155.41 km) |
| Witham to Okemos (Michigan) | 3,806.85 mi (6,126.54 km) |
| Witham to Oklahoma City (Oklahoma) | 4,655.75 mi (7,492.70 km) |
| Witham to Okmulgee (Oklahoma) | 4,591.77 mi (7,389.73 km) |
| Witham to Olathe (Kansas) | 4,381.61 mi (7,051.52 km) |
| Witham to Old Jamestown (Missouri) | 4,213.49 mi (6,780.95 km) |
| Witham to Oldsmar (Florida) | 4,444.94 mi (7,153.43 km) |
| Witham to Olean (New York) | 3,602.72 mi (5,798.03 km) |
| Witham to Olive Branch (Mississippi) | 4,388.24 mi (7,062.19 km) |
| Witham to Olivehurst (California) | 5,260.52 mi (8,465.99 km) |
| Witham to Olney (Maryland) | 3,679.82 mi (5,922.10 km) |
| Witham to Olympia (Washington) | 4,835.36 mi (7,781.77 km) |
