| Knightdale to Opwijk | 4,056.45 mi (6,528.23 km) |
| Knightdale to Ostend | 3,998.77 mi (6,435.40 km) |
| Knightdale to Oud-Heverlee | 4,079.40 mi (6,565.15 km) |
| Knightdale to Oud-Turnhout | 4,080.85 mi (6,567.50 km) |
| Knightdale to Oudenaarde | 4,035.20 mi (6,494.03 km) |
| Knightdale to Oudenburg | 4,003.02 mi (6,442.24 km) |
| Knightdale to Oupeye | 4,122.39 mi (6,634.35 km) |
| Knightdale to Overijse | 4,075.11 mi (6,558.25 km) |
| Knightdale to Overpelt | 4,100.82 mi (6,599.64 km) |
| Knightdale to Paal | 4,095.17 mi (6,590.54 km) |
| Knightdale to Peer | 4,104.34 mi (6,605.30 km) |
| Knightdale to Pepinster | 4,132.99 mi (6,651.40 km) |
| Knightdale to Peruwelz | 4,042.19 mi (6,505.28 km) |
| Knightdale to Perwez | 4,090.47 mi (6,582.98 km) |
| Knightdale to Philippeville | 4,089.71 mi (6,581.76 km) |
