| Gateway to Orangevale (California) | 2,422.67 mi (3,898.91 km) |
| Gateway to Orchards (Washington) | 2,592.12 mi (4,171.61 km) |
| Gateway to Orcutt (California) | 2,352.12 mi (3,785.37 km) |
| Gateway to Oregon (Ohio) | 1,045.85 mi (1,683.14 km) |
| Gateway to Oregon (Wisconsin) | 1,208.57 mi (1,945.01 km) |
| Gateway to Oregon City (Oregon) | 2,588.31 mi (4,165.49 km) |
| Gateway to Orem (Utah) | 1,956.34 mi (3,148.42 km) |
| Gateway to Orinda (California) | 2,467.12 mi (3,970.45 km) |
| Gateway to Orland Park (Illinois) | 1,094.97 mi (1,762.19 km) |
| Gateway to Orlando (Florida) | 133.50 mi (214.84 km) |
| Gateway to Ormond Beach (Florida) | 191.94 mi (308.89 km) |
| Gateway to Oro Valley (Arizona) | 1,797.57 mi (2,892.92 km) |
| Gateway to Oroville (California) | 2,449.28 mi (3,941.73 km) |
| Gateway to Oshkosh (Wisconsin) | 1,263.89 mi (2,034.03 km) |
| Gateway to Oskaloosa (Iowa) | 1,190.83 mi (1,916.45 km) |
