| Gardner to Orangevale (California) | 1,411.91 mi (2,272.25 km) |
| Gardner to Orchards (Washington) | 1,480.82 mi (2,383.14 km) |
| Gardner to Orcutt (California) | 1,430.94 mi (2,302.88 km) |
| Gardner to Oregon (Ohio) | 636.73 mi (1,024.72 km) |
| Gardner to Oregon (Wisconsin) | 405.41 mi (652.44 km) |
| Gardner to Oregon City (Oregon) | 1,480.28 mi (2,382.27 km) |
| Gardner to Orem (Utah) | 897.98 mi (1,445.16 km) |
| Gardner to Orinda (California) | 1,472.64 mi (2,369.98 km) |
| Gardner to Orland Park (Illinois) | 419.69 mi (675.42 km) |
| Gardner to Orlando (Florida) | 1,056.52 mi (1,700.30 km) |
| Gardner to Ormond Beach (Florida) | 1,026.70 mi (1,652.31 km) |
| Gardner to Oro Valley (Arizona) | 1,001.84 mi (1,612.30 km) |
| Gardner to Oroville (California) | 1,422.65 mi (2,289.54 km) |
| Gardner to Oshkosh (Wisconsin) | 487.95 mi (785.28 km) |
| Gardner to Oskaloosa (Iowa) | 209.73 mi (337.52 km) |
