| Poiana Mare to Olympia Heights (Florida) | 5,620.14 mi (9,044.75 km) |
| Poiana Mare to Omaha (Nebraska) | 5,445.43 mi (8,763.58 km) |
| Poiana Mare to On Top of the World Designated Place (Florida) | 5,539.24 mi (8,914.54 km) |
| Poiana Mare to Onalaska (Wisconsin) | 5,146.41 mi (8,282.34 km) |
| Poiana Mare to Oneida (New York) | 4,615.68 mi (7,428.21 km) |
| Poiana Mare to Oneonta (New York) | 4,619.43 mi (7,434.25 km) |
| Poiana Mare to Ontario (California) | 6,509.03 mi (10,475.28 km) |
| Poiana Mare to Ontario (Oregon) | 5,880.75 mi (9,464.15 km) |
| Poiana Mare to Opa-locka (Florida) | 5,607.89 mi (9,025.03 km) |
| Poiana Mare to Opelika (Alabama) | 5,492.02 mi (8,838.54 km) |
| Poiana Mare to Opelousas (Louisiana) | 5,867.11 mi (9,442.21 km) |
| Poiana Mare to Orange (California) | 6,529.15 mi (10,507.65 km) |
| Poiana Mare to Orange (Texas) | 5,953.28 mi (9,580.88 km) |
| Poiana Mare to Orange City (Florida) | 5,504.94 mi (8,859.35 km) |
| Poiana Mare to Orangeburg (South Carolina) | 5,266.73 mi (8,475.99 km) |
