| Povoa de Santa Iria to Odessa (Texas) | 5,038.73 mi (8,109.05 km) |
| Povoa de Santa Iria to Ogden (Utah) | 5,083.42 mi (8,180.97 km) |
| Povoa de Santa Iria to Oildale (California) | 5,633.84 mi (9,066.79 km) |
| Povoa de Santa Iria to Ojus (Florida) | 4,138.73 mi (6,660.65 km) |
| Povoa de Santa Iria to Okemos (Michigan) | 3,815.83 mi (6,140.98 km) |
| Povoa de Santa Iria to Oklahoma City (Oklahoma) | 4,669.79 mi (7,515.30 km) |
| Povoa de Santa Iria to Okmulgee (Oklahoma) | 4,592.82 mi (7,391.42 km) |
| Povoa de Santa Iria to Olathe (Kansas) | 4,420.17 mi (7,113.58 km) |
| Povoa de Santa Iria to Old Jamestown (Missouri) | 4,208.76 mi (6,773.35 km) |
| Povoa de Santa Iria to Oldsmar (Florida) | 4,195.38 mi (6,751.81 km) |
| Povoa de Santa Iria to Olean (New York) | 3,549.82 mi (5,712.88 km) |
| Povoa de Santa Iria to Olive Branch (Mississippi) | 4,318.06 mi (6,949.25 km) |
| Povoa de Santa Iria to Olivehurst (California) | 5,564.82 mi (8,955.71 km) |
| Povoa de Santa Iria to Olney (Maryland) | 3,559.38 mi (5,728.27 km) |
| Povoa de Santa Iria to Olympia (Washington) | 5,239.20 mi (8,431.67 km) |
