| Lombard to Orangevale (California) | 1,752.98 mi (2,821.15 km) |
| Lombard to Orchards (Washington) | 1,728.09 mi (2,781.10 km) |
| Lombard to Orcutt (California) | 1,809.03 mi (2,911.34 km) |
| Lombard to Oregon (Ohio) | 236.69 mi (380.92 km) |
| Lombard to Oregon (Wisconsin) | 100.92 mi (162.42 km) |
| Lombard to Oregon City (Oregon) | 1,732.79 mi (2,788.65 km) |
| Lombard to Orem (Utah) | 1,234.24 mi (1,986.32 km) |
| Lombard to Orinda (California) | 1,820.10 mi (2,929.17 km) |
| Lombard to Orland Park (Illinois) | 20.05 mi (32.27 km) |
| Lombard to Orlando (Florida) | 998.69 mi (1,607.24 km) |
| Lombard to Ormond Beach (Florida) | 950.95 mi (1,530.41 km) |
| Lombard to Oro Valley (Arizona) | 1,417.00 mi (2,280.45 km) |
| Lombard to Oroville (California) | 1,754.06 mi (2,822.88 km) |
| Lombard to Oshkosh (Wisconsin) | 151.00 mi (243.01 km) |
| Lombard to Oskaloosa (Iowa) | 242.34 mi (390.00 km) |
