| Martinez to Orangevale (California) | 68.00 mi (109.43 km) |
| Martinez to Orchards (Washington) | 531.79 mi (855.83 km) |
| Martinez to Orcutt (California) | 235.82 mi (379.52 km) |
| Martinez to Oregon (Ohio) | 2,050.84 mi (3,300.50 km) |
| Martinez to Oregon (Wisconsin) | 1,742.27 mi (2,803.92 km) |
| Martinez to Oregon City (Oregon) | 507.97 mi (817.49 km) |
| Martinez to Orem (Utah) | 579.93 mi (933.30 km) |
| Martinez to Orinda (California) | 8.83 mi (14.20 km) |
| Martinez to Orland Park (Illinois) | 1,823.13 mi (2,934.05 km) |
| Martinez to Orlando (Florida) | 2,425.76 mi (3,903.88 km) |
| Martinez to Ormond Beach (Florida) | 2,413.73 mi (3,884.52 km) |
| Martinez to Oro Valley (Arizona) | 736.73 mi (1,185.65 km) |
| Martinez to Oroville (California) | 107.93 mi (173.69 km) |
| Martinez to Oshkosh (Wisconsin) | 1,785.01 mi (2,872.70 km) |
| Martinez to Oskaloosa (Iowa) | 1,576.88 mi (2,537.74 km) |
