| Ellicott City to Orthez | 3,812.83 mi (6,136.15 km) |
| Ellicott City to Orvault | 3,675.35 mi (5,914.90 km) |
| Ellicott City to Osny | 3,788.90 mi (6,097.64 km) |
| Ellicott City to Ostwald | 4,038.68 mi (6,499.63 km) |
| Ellicott City to Ouistreham | 3,685.55 mi (5,931.32 km) |
| Ellicott City to Oullins | 3,998.81 mi (6,435.46 km) |
| Ellicott City to Outreau | 3,728.68 mi (6,000.73 km) |
| Ellicott City to Oyonnax | 4,019.57 mi (6,468.88 km) |
| Ellicott City to Ozoir-la-Ferriere | 3,822.17 mi (6,151.18 km) |
| Ellicott City to Pace | 3,647.60 mi (5,870.24 km) |
| Ellicott City to Palaiseau | 3,805.49 mi (6,124.34 km) |
| Ellicott City to Pamiers | 3,932.46 mi (6,328.68 km) |
| Ellicott City to Panazol | 3,841.66 mi (6,182.55 km) |
| Ellicott City to Pantin | 3,807.36 mi (6,127.35 km) |
| Ellicott City to Paray-le-Monial | 3,947.47 mi (6,352.84 km) |
