| Penrith to Olympia Heights (Florida) | 4,298.85 mi (6,918.34 km) |
| Penrith to Omaha (Nebraska) | 4,085.88 mi (6,575.58 km) |
| Penrith to On Top of the World Designated Place (Florida) | 4,197.39 mi (6,755.04 km) |
| Penrith to Onalaska (Wisconsin) | 3,784.53 mi (6,090.61 km) |
| Penrith to Oneida (New York) | 3,251.01 mi (5,231.99 km) |
| Penrith to Oneonta (New York) | 3,256.48 mi (5,240.81 km) |
| Penrith to Ontario (California) | 5,196.72 mi (8,363.31 km) |
| Penrith to Ontario (Oregon) | 4,605.07 mi (7,411.14 km) |
| Penrith to Opa-locka (Florida) | 4,286.19 mi (6,897.95 km) |
| Penrith to Opelika (Alabama) | 4,132.88 mi (6,651.23 km) |
| Penrith to Opelousas (Louisiana) | 4,501.61 mi (7,244.63 km) |
| Penrith to Orange (California) | 5,217.09 mi (8,396.09 km) |
| Penrith to Orange (Texas) | 4,586.63 mi (7,381.46 km) |
| Penrith to Orange City (Florida) | 4,167.00 mi (6,706.13 km) |
| Penrith to Orangeburg (South Carolina) | 3,915.18 mi (6,300.88 km) |
