| Garland to Oswego (Illinois) | 757.62 mi (1,219.28 km) |
| Garland to Oswego (New York) | 1,308.21 mi (2,105.36 km) |
| Garland to Otsego (Minnesota) | 868.67 mi (1,397.99 km) |
| Garland to Ottawa (Illinois) | 724.08 mi (1,165.30 km) |
| Garland to Ottawa (Kansas) | 400.50 mi (644.54 km) |
| Garland to Ottumwa (Iowa) | 606.43 mi (975.96 km) |
| Garland to Overland (Missouri) | 531.65 mi (855.61 km) |
| Garland to Overland Park (Kansas) | 427.02 mi (687.23 km) |
| Garland to Overlea (Maryland) | 1,204.34 mi (1,938.20 km) |
| Garland to Oviedo (Florida) | 961.50 mi (1,547.38 km) |
| Garland to Owasso (Oklahoma) | 237.77 mi (382.65 km) |
| Garland to Owatonna (Minnesota) | 793.91 mi (1,277.68 km) |
| Garland to Owensboro (Kentucky) | 631.71 mi (1,016.64 km) |
| Garland to Owings Mills (Maryland) | 1,191.15 mi (1,916.98 km) |
| Garland to Owosso (Michigan) | 970.54 mi (1,561.93 km) |
