| Littleport to Olympia Heights (Florida) | 4,443.86 mi (7,151.70 km) |
| Littleport to Omaha (Nebraska) | 4,271.53 mi (6,874.36 km) |
| Littleport to On Top of the World Designated Place (Florida) | 4,351.34 mi (7,002.81 km) |
| Littleport to Onalaska (Wisconsin) | 3,969.16 mi (6,387.74 km) |
| Littleport to Oneida (New York) | 3,420.06 mi (5,504.05 km) |
| Littleport to Oneonta (New York) | 3,423.70 mi (5,509.91 km) |
| Littleport to Ontario (California) | 5,391.08 mi (8,676.11 km) |
| Littleport to Ontario (Oregon) | 4,801.91 mi (7,727.93 km) |
| Littleport to Opa-locka (Florida) | 4,431.34 mi (7,131.56 km) |
| Littleport to Opelika (Alabama) | 4,296.96 mi (6,915.28 km) |
| Littleport to Opelousas (Louisiana) | 4,671.56 mi (7,518.16 km) |
| Littleport to Orange (California) | 5,411.46 mi (8,708.91 km) |
| Littleport to Orange (Texas) | 4,758.18 mi (7,657.55 km) |
| Littleport to Orange City (Florida) | 4,319.06 mi (6,950.85 km) |
| Littleport to Orangeburg (South Carolina) | 4,074.20 mi (6,556.79 km) |
