| Hilo to Odessa (Texas) | 3,354.47 mi (5,398.50 km) |
| Hilo to Ogden (Utah) | 2,926.76 mi (4,710.16 km) |
| Hilo to Oildale (California) | 2,443.10 mi (3,931.79 km) |
| Hilo to Ojus (Florida) | 4,728.11 mi (7,609.16 km) |
| Hilo to Okemos (Michigan) | 4,337.33 mi (6,980.25 km) |
| Hilo to Oklahoma City (Oklahoma) | 3,637.76 mi (5,854.41 km) |
| Hilo to Okmulgee (Oklahoma) | 3,722.63 mi (5,991.00 km) |
| Hilo to Olathe (Kansas) | 3,793.29 mi (6,104.71 km) |
| Hilo to Old Jamestown (Missouri) | 4,037.21 mi (6,497.26 km) |
| Hilo to Oldsmar (Florida) | 4,548.38 mi (7,319.92 km) |
| Hilo to Olean (New York) | 4,644.89 mi (7,475.23 km) |
| Hilo to Olive Branch (Mississippi) | 4,070.99 mi (6,551.62 km) |
| Hilo to Olivehurst (California) | 2,400.95 mi (3,863.95 km) |
| Hilo to Olney (Maryland) | 4,742.17 mi (7,631.78 km) |
| Hilo to Olympia (Washington) | 2,615.57 mi (4,209.35 km) |
