| Glenn Dale to Noventa Vicentina | 4,313.19 mi (6,941.41 km) |
| Glenn Dale to Novi di Modena | 4,299.07 mi (6,918.68 km) |
| Glenn Dale to Novi Ligure | 4,211.98 mi (6,778.53 km) |
| Glenn Dale to Nuoro | 4,384.06 mi (7,055.46 km) |
| Glenn Dale to Occhiobello | 4,327.30 mi (6,964.12 km) |
| Glenn Dale to Oderzo | 4,337.22 mi (6,980.09 km) |
| Glenn Dale to Oggiono | 4,203.70 mi (6,765.20 km) |
| Glenn Dale to Olbia | 4,371.04 mi (7,034.51 km) |
| Glenn Dale to Oleggio | 4,178.73 mi (6,725.01 km) |
| Glenn Dale to Olgiate Comasco | 4,187.28 mi (6,738.77 km) |
| Glenn Dale to Olgiate Olona | 4,188.43 mi (6,740.63 km) |
| Glenn Dale to Omegna | 4,160.29 mi (6,695.34 km) |
| Glenn Dale to Opera | 4,210.70 mi (6,776.47 km) |
| Glenn Dale to Oppeano | 4,297.71 mi (6,916.50 km) |
| Glenn Dale to Orbassano | 4,149.77 mi (6,678.41 km) |
