| Delaware to Nyon | 4,261.32 mi (6,857.93 km) |
| Delaware to Oberriet | 4,363.98 mi (7,023.15 km) |
| Delaware to Obersiggenthal | 4,306.82 mi (6,931.15 km) |
| Delaware to Oberwil | 4,276.18 mi (6,881.85 km) |
| Delaware to Oberwingert | 4,324.90 mi (6,960.25 km) |
| Delaware to Oftringen | 4,297.66 mi (6,916.41 km) |
| Delaware to Olten | 4,295.82 mi (6,913.45 km) |
| Delaware to Onex | 4,262.71 mi (6,860.16 km) |
| Delaware to Opfikon | 4,319.74 mi (6,951.95 km) |
| Delaware to Ostermundigen | 4,292.98 mi (6,908.88 km) |
| Delaware to Payerne | 4,275.10 mi (6,880.12 km) |
| Delaware to Pfaffikon | 4,330.80 mi (6,969.74 km) |
| Delaware to Plan-les-Ouates | 4,263.97 mi (6,862.20 km) |
| Delaware to Pratteln | 4,281.94 mi (6,891.11 km) |
| Delaware to Prilly | 4,271.25 mi (6,873.92 km) |
