| Glenn Dale to Orthez | 3,821.90 mi (6,150.75 km) |
| Glenn Dale to Orvault | 3,685.68 mi (5,931.53 km) |
| Glenn Dale to Osny | 3,800.18 mi (6,115.80 km) |
| Glenn Dale to Ostwald | 4,050.32 mi (6,518.37 km) |
| Glenn Dale to Ouistreham | 3,696.71 mi (5,949.29 km) |
| Glenn Dale to Oullins | 4,009.25 mi (6,452.27 km) |
| Glenn Dale to Outreau | 3,740.48 mi (6,019.72 km) |
| Glenn Dale to Oyonnax | 4,030.28 mi (6,486.11 km) |
| Glenn Dale to Ozoir-la-Ferriere | 3,833.41 mi (6,169.28 km) |
| Glenn Dale to Pace | 3,658.23 mi (5,887.36 km) |
| Glenn Dale to Palaiseau | 3,816.68 mi (6,142.35 km) |
| Glenn Dale to Pamiers | 3,941.67 mi (6,343.51 km) |
| Glenn Dale to Panazol | 3,851.78 mi (6,198.83 km) |
| Glenn Dale to Pantin | 3,818.62 mi (6,145.47 km) |
| Glenn Dale to Paray-le-Monial | 3,958.08 mi (6,369.91 km) |
