| Grand Prairie to Olympia Heights (Florida) | 1,113.35 mi (1,791.76 km) |
| Grand Prairie to Omaha (Nebraska) | 594.91 mi (957.41 km) |
| Grand Prairie to On Top of the World Designated Place (Florida) | 907.04 mi (1,459.74 km) |
| Grand Prairie to Onalaska (Wisconsin) | 835.11 mi (1,343.99 km) |
| Grand Prairie to Oneida (New York) | 1,362.18 mi (2,192.22 km) |
| Grand Prairie to Oneonta (New York) | 1,372.81 mi (2,209.33 km) |
| Grand Prairie to Ontario (California) | 1,189.59 mi (1,914.46 km) |
| Grand Prairie to Ontario (Oregon) | 1,329.34 mi (2,139.36 km) |
| Grand Prairie to Opa-locka (Florida) | 1,111.98 mi (1,789.55 km) |
| Grand Prairie to Opelika (Alabama) | 676.87 mi (1,089.31 km) |
| Grand Prairie to Opelousas (Louisiana) | 326.73 mi (525.82 km) |
| Grand Prairie to Orange (California) | 1,202.41 mi (1,935.10 km) |
| Grand Prairie to Orange (Texas) | 261.42 mi (420.72 km) |
| Grand Prairie to Orange City (Florida) | 967.85 mi (1,557.61 km) |
| Grand Prairie to Orangeburg (South Carolina) | 935.81 mi (1,506.04 km) |
