| Marshall to Odessa (Texas) | 469.38 mi (755.40 km) |
| Marshall to Ogden (Utah) | 1,140.56 mi (1,835.55 km) |
| Marshall to Oildale (California) | 1,424.20 mi (2,292.03 km) |
| Marshall to Ojus (Florida) | 967.56 mi (1,557.13 km) |
| Marshall to Okemos (Michigan) | 887.12 mi (1,427.68 km) |
| Marshall to Oklahoma City (Oklahoma) | 271.64 mi (437.16 km) |
| Marshall to Okmulgee (Oklahoma) | 232.70 mi (374.50 km) |
| Marshall to Olathe (Kansas) | 439.27 mi (706.94 km) |
| Marshall to Old Jamestown (Missouri) | 491.49 mi (790.98 km) |
| Marshall to Oldsmar (Florida) | 762.13 mi (1,226.53 km) |
| Marshall to Olean (New York) | 1,092.52 mi (1,758.25 km) |
| Marshall to Olive Branch (Mississippi) | 308.20 mi (496.00 km) |
| Marshall to Olivehurst (California) | 1,583.19 mi (2,547.90 km) |
| Marshall to Olney (Maryland) | 1,067.78 mi (1,718.43 km) |
| Marshall to Olympia (Washington) | 1,800.93 mi (2,898.32 km) |
