| Santa Monica to Orangeburg (South Carolina) | 2,148.64 mi (3,457.91 km) |
| Santa Monica to Orangevale (California) | 356.48 mi (573.71 km) |
| Santa Monica to Orchards (Washington) | 833.84 mi (1,341.93 km) |
| Santa Monica to Orcutt (California) | 125.09 mi (201.31 km) |
| Santa Monica to Oregon (Ohio) | 1,968.88 mi (3,168.61 km) |
| Santa Monica to Oregon (Wisconsin) | 1,679.08 mi (2,702.23 km) |
| Santa Monica to Oregon City (Oregon) | 811.70 mi (1,306.31 km) |
| Santa Monica to Orem (Utah) | 571.80 mi (920.22 km) |
| Santa Monica to Orinda (California) | 337.29 mi (542.81 km) |
| Santa Monica to Orland Park (Illinois) | 1,740.96 mi (2,801.80 km) |
| Santa Monica to Orlando (Florida) | 2,214.96 mi (3,564.64 km) |
| Santa Monica to Ormond Beach (Florida) | 2,210.13 mi (3,556.86 km) |
| Santa Monica to Oro Valley (Arizona) | 447.54 mi (720.25 km) |
| Santa Monica to Oroville (California) | 415.00 mi (667.87 km) |
| Santa Monica to Oshkosh (Wisconsin) | 1,735.95 mi (2,793.74 km) |
