| Newburyport to Olympia Heights (Florida) | 1,296.09 mi (2,085.86 km) |
| Newburyport to Omaha (Nebraska) | 1,290.99 mi (2,077.64 km) |
| Newburyport to On Top of the World Designated Place (Florida) | 1,139.21 mi (1,833.38 km) |
| Newburyport to Onalaska (Wisconsin) | 1,021.03 mi (1,643.19 km) |
| Newburyport to Oneida (New York) | 242.13 mi (389.68 km) |
| Newburyport to Oneonta (New York) | 213.82 mi (344.12 km) |
| Newburyport to Ontario (California) | 2,566.08 mi (4,129.70 km) |
| Newburyport to Ontario (Oregon) | 2,283.97 mi (3,675.70 km) |
| Newburyport to Opa-locka (Florida) | 1,282.89 mi (2,064.61 km) |
| Newburyport to Opelika (Alabama) | 1,054.93 mi (1,697.74 km) |
| Newburyport to Opelousas (Louisiana) | 1,442.41 mi (2,321.33 km) |
| Newburyport to Orange (California) | 2,584.61 mi (4,159.53 km) |
| Newburyport to Orange (Texas) | 1,535.85 mi (2,471.72 km) |
| Newburyport to Orange City (Florida) | 1,119.75 mi (1,802.07 km) |
| Newburyport to Orangeburg (South Carolina) | 840.53 mi (1,352.70 km) |
