| Sligo to Orangevale (California) | 4,881.97 mi (7,856.78 km) |
| Sligo to Orchards (Washington) | 4,525.98 mi (7,283.86 km) |
| Sligo to Orcutt (California) | 5,074.07 mi (8,165.92 km) |
| Sligo to Oregon (Ohio) | 3,402.58 mi (5,475.92 km) |
| Sligo to Oregon (Wisconsin) | 3,568.86 mi (5,743.53 km) |
| Sligo to Oregon City (Oregon) | 4,547.18 mi (7,317.98 km) |
| Sligo to Orem (Utah) | 4,488.64 mi (7,223.77 km) |
| Sligo to Orinda (California) | 4,957.38 mi (7,978.13 km) |
| Sligo to Orland Park (Illinois) | 3,573.51 mi (5,751.00 km) |
| Sligo to Orlando (Florida) | 3,967.74 mi (6,385.46 km) |
| Sligo to Ormond Beach (Florida) | 3,915.87 mi (6,301.99 km) |
| Sligo to Oro Valley (Arizona) | 4,893.10 mi (7,874.69 km) |
| Sligo to Oroville (California) | 4,846.41 mi (7,799.55 km) |
| Sligo to Oshkosh (Wisconsin) | 3,487.20 mi (5,612.10 km) |
| Sligo to Oskaloosa (Iowa) | 3,767.35 mi (6,062.96 km) |
