| The Dalles to Odenton (Maryland) | 2,286.28 mi (3,679.41 km) |
| The Dalles to Odessa (Texas) | 1,382.62 mi (2,225.12 km) |
| The Dalles to Ogden (Utah) | 551.99 mi (888.35 km) |
| The Dalles to Oildale (California) | 712.04 mi (1,145.92 km) |
| The Dalles to Ojus (Florida) | 2,629.96 mi (4,232.52 km) |
| The Dalles to Okemos (Michigan) | 1,817.51 mi (2,925.00 km) |
| The Dalles to Oklahoma City (Oklahoma) | 1,418.80 mi (2,283.34 km) |
| The Dalles to Okmulgee (Oklahoma) | 1,481.28 mi (2,383.89 km) |
| The Dalles to Olathe (Kansas) | 1,418.43 mi (2,282.75 km) |
| The Dalles to Old Jamestown (Missouri) | 1,637.08 mi (2,634.62 km) |
| The Dalles to Oldsmar (Florida) | 2,418.44 mi (3,892.10 km) |
| The Dalles to Olean (New York) | 2,118.75 mi (3,409.80 km) |
| The Dalles to Olive Branch (Mississippi) | 1,793.07 mi (2,885.67 km) |
| The Dalles to Olivehurst (California) | 451.29 mi (726.29 km) |
| The Dalles to Olney (Maryland) | 2,265.64 mi (3,646.20 km) |
