| Watford to Odessa (Texas) | 4,990.83 mi (8,031.96 km) |
| Watford to Ogden (Utah) | 4,822.56 mi (7,761.17 km) |
| Watford to Oildale (California) | 5,371.13 mi (8,644.00 km) |
| Watford to Ojus (Florida) | 4,404.26 mi (7,087.96 km) |
| Watford to Okemos (Michigan) | 3,771.70 mi (6,069.97 km) |
| Watford to Oklahoma City (Oklahoma) | 4,621.78 mi (7,438.03 km) |
| Watford to Okmulgee (Oklahoma) | 4,557.34 mi (7,334.32 km) |
| Watford to Olathe (Kansas) | 4,348.07 mi (6,997.54 km) |
| Watford to Old Jamestown (Missouri) | 4,178.45 mi (6,724.57 km) |
| Watford to Oldsmar (Florida) | 4,404.13 mi (7,087.76 km) |
| Watford to Olean (New York) | 3,565.60 mi (5,738.28 km) |
| Watford to Olive Branch (Mississippi) | 4,351.58 mi (7,003.19 km) |
| Watford to Olivehurst (California) | 5,237.64 mi (8,429.17 km) |
| Watford to Olney (Maryland) | 3,641.11 mi (5,859.80 km) |
| Watford to Olympia (Washington) | 4,816.28 mi (7,751.06 km) |
