| Dartford to Odessa (Texas) | 5,021.17 mi (8,080.78 km) |
| Dartford to Ogden (Utah) | 4,852.16 mi (7,808.79 km) |
| Dartford to Oildale (California) | 5,400.59 mi (8,691.40 km) |
| Dartford to Ojus (Florida) | 4,432.83 mi (7,133.95 km) |
| Dartford to Okemos (Michigan) | 3,802.01 mi (6,118.74 km) |
| Dartford to Oklahoma City (Oklahoma) | 4,652.12 mi (7,486.86 km) |
| Dartford to Okmulgee (Oklahoma) | 4,587.67 mi (7,383.13 km) |
| Dartford to Olathe (Kansas) | 4,378.41 mi (7,046.37 km) |
| Dartford to Old Jamestown (Missouri) | 4,208.76 mi (6,773.35 km) |
| Dartford to Oldsmar (Florida) | 4,433.26 mi (7,134.63 km) |
| Dartford to Olean (New York) | 3,595.72 mi (5,786.75 km) |
| Dartford to Olive Branch (Mississippi) | 4,381.76 mi (7,051.75 km) |
| Dartford to Olivehurst (California) | 5,266.55 mi (8,475.70 km) |
| Dartford to Olney (Maryland) | 3,670.93 mi (5,907.80 km) |
| Dartford to Olympia (Washington) | 4,844.19 mi (7,795.97 km) |
