| Upper Grand Lagoon to Orangeburg (South Carolina) | 366.78 mi (590.27 km) |
| Upper Grand Lagoon to Orangevale (California) | 2,091.44 mi (3,365.85 km) |
| Upper Grand Lagoon to Orchards (Washington) | 2,246.53 mi (3,615.44 km) |
| Upper Grand Lagoon to Orcutt (California) | 2,036.21 mi (3,276.96 km) |
| Upper Grand Lagoon to Oregon (Ohio) | 803.79 mi (1,293.57 km) |
| Upper Grand Lagoon to Oregon (Wisconsin) | 904.09 mi (1,454.99 km) |
| Upper Grand Lagoon to Oregon City (Oregon) | 2,243.09 mi (3,609.90 km) |
| Upper Grand Lagoon to Orem (Utah) | 1,615.44 mi (2,599.81 km) |
| Upper Grand Lagoon to Orinda (California) | 2,138.96 mi (3,442.32 km) |
| Upper Grand Lagoon to Orland Park (Illinois) | 799.12 mi (1,286.06 km) |
| Upper Grand Lagoon to Orlando (Florida) | 289.86 mi (466.48 km) |
| Upper Grand Lagoon to Ormond Beach (Florida) | 284.74 mi (458.25 km) |
| Upper Grand Lagoon to Oro Valley (Arizona) | 1,494.57 mi (2,405.28 km) |
| Upper Grand Lagoon to Oroville (California) | 2,115.57 mi (3,404.68 km) |
| Upper Grand Lagoon to Oshkosh (Wisconsin) | 969.58 mi (1,560.38 km) |
