| Hilo to Orangevale (California) | 2,406.60 mi (3,873.05 km) |
| Hilo to Orchards (Washington) | 2,577.39 mi (4,147.91 km) |
| Hilo to Orcutt (California) | 2,356.60 mi (3,792.58 km) |
| Hilo to Oregon (Ohio) | 4,391.22 mi (7,066.99 km) |
| Hilo to Oregon (Wisconsin) | 4,085.03 mi (6,574.23 km) |
| Hilo to Oregon City (Oregon) | 2,561.78 mi (4,122.78 km) |
| Hilo to Orem (Utah) | 2,921.86 mi (4,702.28 km) |
| Hilo to Orinda (California) | 2,336.84 mi (3,760.78 km) |
| Hilo to Orland Park (Illinois) | 4,162.74 mi (6,699.28 km) |
| Hilo to Orlando (Florida) | 4,622.76 mi (7,439.61 km) |
| Hilo to Ormond Beach (Florida) | 4,626.37 mi (7,445.43 km) |
| Hilo to Oro Valley (Arizona) | 2,853.41 mi (4,592.12 km) |
| Hilo to Oroville (California) | 2,412.63 mi (3,882.76 km) |
| Hilo to Oshkosh (Wisconsin) | 4,128.08 mi (6,643.50 km) |
| Hilo to Oskaloosa (Iowa) | 3,915.00 mi (6,300.59 km) |
