| Olesa de Montserrat to Odessa (Texas) | 5,445.72 mi (8,764.04 km) |
| Olesa de Montserrat to Ogden (Utah) | 5,383.35 mi (8,663.67 km) |
| Olesa de Montserrat to Oildale (California) | 5,936.89 mi (9,554.50 km) |
| Olesa de Montserrat to Ojus (Florida) | 4,661.19 mi (7,501.46 km) |
| Olesa de Montserrat to Okemos (Michigan) | 4,212.81 mi (6,779.86 km) |
| Olesa de Montserrat to Oklahoma City (Oklahoma) | 5,073.54 mi (8,165.08 km) |
| Olesa de Montserrat to Okmulgee (Oklahoma) | 5,001.59 mi (8,049.28 km) |
| Olesa de Montserrat to Olathe (Kansas) | 4,810.46 mi (7,741.68 km) |
| Olesa de Montserrat to Old Jamestown (Missouri) | 4,616.23 mi (7,429.10 km) |
| Olesa de Montserrat to Oldsmar (Florida) | 4,699.03 mi (7,562.36 km) |
| Olesa de Montserrat to Olean (New York) | 3,970.44 mi (6,389.81 km) |
| Olesa de Montserrat to Olive Branch (Mississippi) | 4,754.61 mi (7,651.80 km) |
| Olesa de Montserrat to Olivehurst (California) | 5,830.49 mi (9,383.27 km) |
| Olesa de Montserrat to Olney (Maryland) | 4,008.07 mi (6,450.36 km) |
| Olesa de Montserrat to Olympia (Washington) | 5,444.06 mi (8,761.36 km) |
