| Greenock to Nyon | 812.76 mi (1,308.01 km) |
| Greenock to Oberriet | 853.37 mi (1,373.37 km) |
| Greenock to Obersiggenthal | 806.33 mi (1,297.66 km) |
| Greenock to Oberwil | 783.66 mi (1,261.18 km) |
| Greenock to Oberwingert | 818.78 mi (1,317.70 km) |
| Greenock to Oftringen | 804.75 mi (1,295.12 km) |
| Greenock to Olten | 802.45 mi (1,291.41 km) |
| Greenock to Onex | 821.28 mi (1,321.72 km) |
| Greenock to Opfikon | 817.26 mi (1,315.26 km) |
| Greenock to Ostermundigen | 812.85 mi (1,308.15 km) |
| Greenock to Payerne | 805.65 mi (1,296.57 km) |
| Greenock to Pfaffikon | 827.23 mi (1,331.29 km) |
| Greenock to Plan-les-Ouates | 822.67 mi (1,323.96 km) |
| Greenock to Pratteln | 787.62 mi (1,267.55 km) |
| Greenock to Prilly | 813.28 mi (1,308.85 km) |
