| Alpena to Nyon | 4,075.01 mi (6,558.10 km) |
| Alpena to Oberriet | 4,166.78 mi (6,705.78 km) |
| Alpena to Obersiggenthal | 4,111.36 mi (6,616.59 km) |
| Alpena to Oberwil | 4,082.04 mi (6,569.41 km) |
| Alpena to Oberwingert | 4,128.37 mi (6,643.98 km) |
| Alpena to Oftringen | 4,103.70 mi (6,604.27 km) |
| Alpena to Olten | 4,101.75 mi (6,601.12 km) |
| Alpena to Onex | 4,077.60 mi (6,562.26 km) |
| Alpena to Opfikon | 4,123.99 mi (6,636.91 km) |
| Alpena to Ostermundigen | 4,101.51 mi (6,600.75 km) |
| Alpena to Payerne | 4,085.38 mi (6,574.79 km) |
| Alpena to Pfaffikon | 4,134.92 mi (6,654.50 km) |
| Alpena to Plan-les-Ouates | 4,078.91 mi (6,564.37 km) |
| Alpena to Pratteln | 4,087.50 mi (6,578.20 km) |
| Alpena to Prilly | 4,083.51 mi (6,571.77 km) |
