| Langley Park to Noventa Vicentina | 4,320.45 mi (6,953.10 km) |
| Langley Park to Novi di Modena | 4,306.39 mi (6,930.47 km) |
| Langley Park to Novi Ligure | 4,219.41 mi (6,790.48 km) |
| Langley Park to Nuoro | 4,391.90 mi (7,068.07 km) |
| Langley Park to Occhiobello | 4,334.60 mi (6,975.86 km) |
| Langley Park to Oderzo | 4,344.39 mi (6,991.62 km) |
| Langley Park to Oggiono | 4,210.99 mi (6,776.94 km) |
| Langley Park to Olbia | 4,378.82 mi (7,047.03 km) |
| Langley Park to Oleggio | 4,186.07 mi (6,736.83 km) |
| Langley Park to Olgiate Comasco | 4,194.59 mi (6,750.54 km) |
| Langley Park to Olgiate Olona | 4,195.76 mi (6,752.42 km) |
| Langley Park to Omegna | 4,167.61 mi (6,707.12 km) |
| Langley Park to Opera | 4,218.05 mi (6,788.29 km) |
| Langley Park to Oppeano | 4,304.98 mi (6,928.20 km) |
| Langley Park to Orbassano | 4,157.22 mi (6,690.39 km) |
