| Northampton to Odessa (Texas) | 4,952.99 mi (7,971.07 km) |
| Northampton to Ogden (Utah) | 4,780.31 mi (7,693.17 km) |
| Northampton to Oildale (California) | 5,328.57 mi (8,575.50 km) |
| Northampton to Ojus (Florida) | 4,377.05 mi (7,044.17 km) |
| Northampton to Okemos (Michigan) | 3,735.24 mi (6,011.28 km) |
| Northampton to Oklahoma City (Oklahoma) | 4,584.27 mi (7,377.68 km) |
| Northampton to Okmulgee (Oklahoma) | 4,520.22 mi (7,274.60 km) |
| Northampton to Olathe (Kansas) | 4,310.21 mi (6,936.61 km) |
| Northampton to Old Jamestown (Missouri) | 4,141.88 mi (6,665.71 km) |
| Northampton to Oldsmar (Florida) | 4,374.82 mi (7,040.59 km) |
| Northampton to Olean (New York) | 3,531.16 mi (5,682.85 km) |
| Northampton to Olive Branch (Mississippi) | 4,316.62 mi (6,946.94 km) |
| Northampton to Olivehurst (California) | 5,194.20 mi (8,359.25 km) |
| Northampton to Olney (Maryland) | 3,608.62 mi (5,807.51 km) |
| Northampton to Olympia (Washington) | 4,771.89 mi (7,679.62 km) |
