| Robstown to Olympia (Washington) | 1,903.52 mi (3,063.41 km) |
| Robstown to Olympia Heights (Florida) | 1,077.78 mi (1,734.52 km) |
| Robstown to Omaha (Nebraska) | 935.08 mi (1,504.87 km) |
| Robstown to On Top of the World Designated Place (Florida) | 938.19 mi (1,509.87 km) |
| Robstown to Onalaska (Wisconsin) | 1,168.45 mi (1,880.44 km) |
| Robstown to Oneida (New York) | 1,618.77 mi (2,605.16 km) |
| Robstown to Oneonta (New York) | 1,621.22 mi (2,609.10 km) |
| Robstown to Ontario (California) | 1,255.48 mi (2,020.50 km) |
| Robstown to Ontario (Oregon) | 1,549.55 mi (2,493.76 km) |
| Robstown to Opa-locka (Florida) | 1,080.53 mi (1,738.95 km) |
| Robstown to Opelika (Alabama) | 806.49 mi (1,297.92 km) |
| Robstown to Opelousas (Louisiana) | 386.28 mi (621.65 km) |
| Robstown to Orange (California) | 1,263.45 mi (2,033.33 km) |
| Robstown to Orange (Texas) | 285.83 mi (460.00 km) |
| Robstown to Orange City (Florida) | 998.26 mi (1,606.54 km) |
