| Swindon to Olympia Heights (Florida) | 4,365.88 mi (7,026.20 km) |
| Swindon to Omaha (Nebraska) | 4,228.52 mi (6,805.15 km) |
| Swindon to On Top of the World Designated Place (Florida) | 4,278.78 mi (6,886.04 km) |
| Swindon to Onalaska (Wisconsin) | 3,924.92 mi (6,316.54 km) |
| Swindon to Oneida (New York) | 3,359.49 mi (5,406.58 km) |
| Swindon to Oneonta (New York) | 3,361.57 mi (5,409.93 km) |
| Swindon to Ontario (California) | 5,364.59 mi (8,633.48 km) |
| Swindon to Ontario (Oregon) | 4,785.73 mi (7,701.88 km) |
| Swindon to Opa-locka (Florida) | 4,353.46 mi (7,006.21 km) |
| Swindon to Opelika (Alabama) | 4,231.59 mi (6,810.09 km) |
| Swindon to Opelousas (Louisiana) | 4,610.82 mi (7,420.40 km) |
| Swindon to Orange (California) | 5,385.00 mi (8,666.33 km) |
| Swindon to Orange (Texas) | 4,698.82 mi (7,562.02 km) |
| Swindon to Orange City (Florida) | 4,245.32 mi (6,832.18 km) |
| Swindon to Orangeburg (South Carolina) | 4,005.25 mi (6,445.83 km) |
