| Foothill Farms to Olympia Heights (Florida) | 2,534.54 mi (4,078.95 km) |
| Foothill Farms to Omaha (Nebraska) | 1,346.23 mi (2,166.55 km) |
| Foothill Farms to On Top of the World Designated Place (Florida) | 2,316.62 mi (3,728.25 km) |
| Foothill Farms to Onalaska (Wisconsin) | 1,596.02 mi (2,568.55 km) |
| Foothill Farms to Oneida (New York) | 2,376.07 mi (3,823.92 km) |
| Foothill Farms to Oneonta (New York) | 2,412.74 mi (3,882.93 km) |
| Foothill Farms to Ontario (California) | 382.58 mi (615.70 km) |
| Foothill Farms to Ontario (Oregon) | 432.85 mi (696.60 km) |
| Foothill Farms to Opa-locka (Florida) | 2,532.78 mi (4,076.12 km) |
| Foothill Farms to Opelika (Alabama) | 2,047.77 mi (3,295.57 km) |
| Foothill Farms to Opelousas (Louisiana) | 1,748.38 mi (2,813.75 km) |
| Foothill Farms to Orange (California) | 390.33 mi (628.17 km) |
| Foothill Farms to Orange (Texas) | 1,672.34 mi (2,691.37 km) |
| Foothill Farms to Orange City (Florida) | 2,375.70 mi (3,823.33 km) |
| Foothill Farms to Orangeburg (South Carolina) | 2,269.88 mi (3,653.01 km) |
