| Glenn Dale to Nasaud | 4,761.85 mi (7,663.46 km) |
| Glenn Dale to Navodari | 5,046.64 mi (8,121.78 km) |
| Glenn Dale to Negresti-Oas | 4,701.13 mi (7,565.74 km) |
| Glenn Dale to Nehoiu | 4,913.54 mi (7,907.58 km) |
| Glenn Dale to Ocna Mures | 4,776.29 mi (7,686.69 km) |
| Glenn Dale to Odobesti | 4,925.76 mi (7,927.25 km) |
| Glenn Dale to Odorheiu Secuiesc | 4,835.26 mi (7,781.60 km) |
| Glenn Dale to Oltenita | 4,979.33 mi (8,013.46 km) |
| Glenn Dale to Onesti | 4,893.90 mi (7,875.97 km) |
| Glenn Dale to Oradea | 4,673.92 mi (7,521.94 km) |
| Glenn Dale to Orastie | 4,771.84 mi (7,679.54 km) |
| Glenn Dale to Oravita | 4,743.26 mi (7,633.53 km) |
| Glenn Dale to Orsova | 4,784.26 mi (7,699.52 km) |
| Glenn Dale to Otelu Rosu | 4,751.30 mi (7,646.49 km) |
| Glenn Dale to Otopeni | 4,937.67 mi (7,946.41 km) |
