| Harstad to Opwijk | 1,298.74 mi (2,090.12 km) |
| Harstad to Ostend | 1,295.28 mi (2,084.54 km) |
| Harstad to Oud-Heverlee | 1,302.74 mi (2,096.56 km) |
| Harstad to Oud-Turnhout | 1,267.08 mi (2,039.16 km) |
| Harstad to Oudenaarde | 1,312.77 mi (2,112.70 km) |
| Harstad to Oudenburg | 1,297.19 mi (2,087.62 km) |
| Harstad to Oupeye | 1,301.73 mi (2,094.94 km) |
| Harstad to Overijse | 1,307.45 mi (2,104.14 km) |
| Harstad to Overpelt | 1,269.57 mi (2,043.18 km) |
| Harstad to Paal | 1,283.88 mi (2,066.21 km) |
| Harstad to Peer | 1,274.88 mi (2,051.71 km) |
| Harstad to Pepinster | 1,309.71 mi (2,107.77 km) |
| Harstad to Peruwelz | 1,335.27 mi (2,148.91 km) |
| Harstad to Perwez | 1,315.34 mi (2,116.83 km) |
| Harstad to Philippeville | 1,346.52 mi (2,167.01 km) |
