| Summit to Odenton (Maryland) | 168.01 mi (270.39 km) |
| Summit to Odessa (Texas) | 1,664.50 mi (2,678.75 km) |
| Summit to Ogden (Utah) | 1,946.51 mi (3,132.61 km) |
| Summit to Oildale (California) | 2,430.38 mi (3,911.32 km) |
| Summit to Ojus (Florida) | 1,072.56 mi (1,726.11 km) |
| Summit to Okemos (Michigan) | 535.87 mi (862.40 km) |
| Summit to Oklahoma City (Oklahoma) | 1,305.61 mi (2,101.18 km) |
| Summit to Okmulgee (Oklahoma) | 1,223.75 mi (1,969.44 km) |
| Summit to Olathe (Kansas) | 1,090.69 mi (1,755.30 km) |
| Summit to Old Jamestown (Missouri) | 854.02 mi (1,374.42 km) |
| Summit to Oldsmar (Florida) | 993.81 mi (1,599.38 km) |
| Summit to Olean (New York) | 230.95 mi (371.68 km) |
| Summit to Olive Branch (Mississippi) | 931.90 mi (1,499.75 km) |
| Summit to Olivehurst (California) | 2,473.69 mi (3,981.01 km) |
| Summit to Olney (Maryland) | 179.76 mi (289.29 km) |
