| Trondheim to Orangevale (California) | 4,898.81 mi (7,883.88 km) |
| Trondheim to Orchards (Washington) | 4,471.06 mi (7,195.48 km) |
| Trondheim to Orcutt (California) | 5,130.13 mi (8,256.15 km) |
| Trondheim to Oregon (Ohio) | 3,807.16 mi (6,127.04 km) |
| Trondheim to Oregon (Wisconsin) | 3,896.51 mi (6,270.82 km) |
| Trondheim to Oregon City (Oregon) | 4,494.51 mi (7,233.21 km) |
| Trondheim to Orem (Utah) | 4,601.35 mi (7,405.16 km) |
| Trondheim to Orinda (California) | 4,969.25 mi (7,997.24 km) |
| Trondheim to Orland Park (Illinois) | 3,932.49 mi (6,328.73 km) |
| Trondheim to Orlando (Florida) | 4,526.10 mi (7,284.05 km) |
| Trondheim to Ormond Beach (Florida) | 4,469.71 mi (7,193.30 km) |
| Trondheim to Oro Valley (Arizona) | 5,082.72 mi (8,179.85 km) |
| Trondheim to Oroville (California) | 4,852.84 mi (7,809.90 km) |
| Trondheim to Oshkosh (Wisconsin) | 3,810.25 mi (6,132.00 km) |
| Trondheim to Oskaloosa (Iowa) | 4,079.40 mi (6,565.16 km) |
