| Gardner to Odessa (Texas) | 635.24 mi (1,022.32 km) |
| Gardner to Ogden (Utah) | 915.43 mi (1,473.24 km) |
| Gardner to Oildale (California) | 1,344.25 mi (2,163.36 km) |
| Gardner to Ojus (Florida) | 1,234.22 mi (1,986.28 km) |
| Gardner to Okemos (Michigan) | 611.89 mi (984.75 km) |
| Gardner to Oklahoma City (Oklahoma) | 271.43 mi (436.82 km) |
| Gardner to Okmulgee (Oklahoma) | 228.85 mi (368.30 km) |
| Gardner to Olathe (Kansas) | 7.59 mi (12.21 km) |
| Gardner to Old Jamestown (Missouri) | 249.89 mi (402.16 km) |
| Gardner to Oldsmar (Florida) | 1,023.94 mi (1,647.88 km) |
| Gardner to Olean (New York) | 894.69 mi (1,439.86 km) |
| Gardner to Olive Branch (Mississippi) | 386.70 mi (622.33 km) |
| Gardner to Olivehurst (California) | 1,425.92 mi (2,294.80 km) |
| Gardner to Olney (Maryland) | 957.80 mi (1,541.43 km) |
| Gardner to Olympia (Washington) | 1,514.75 mi (2,437.75 km) |
