| Apex to Odessa (Texas) | 1,369.98 mi (2,204.77 km) |
| Apex to Ogden (Utah) | 1,818.47 mi (2,926.55 km) |
| Apex to Oildale (California) | 2,240.60 mi (3,605.90 km) |
| Apex to Ojus (Florida) | 679.14 mi (1,092.97 km) |
| Apex to Okemos (Michigan) | 565.94 mi (910.80 km) |
| Apex to Oklahoma City (Oklahoma) | 1,045.78 mi (1,683.02 km) |
| Apex to Okmulgee (Oklahoma) | 960.48 mi (1,545.74 km) |
| Apex to Olathe (Kansas) | 901.84 mi (1,451.37 km) |
| Apex to Old Jamestown (Missouri) | 662.64 mi (1,066.42 km) |
| Apex to Oldsmar (Florida) | 574.88 mi (925.18 km) |
| Apex to Olean (New York) | 439.95 mi (708.03 km) |
| Apex to Olive Branch (Mississippi) | 620.33 mi (998.33 km) |
| Apex to Olivehurst (California) | 2,332.70 mi (3,754.11 km) |
| Apex to Olney (Maryland) | 256.33 mi (412.52 km) |
| Apex to Olympia (Washington) | 2,376.66 mi (3,824.86 km) |
