| Mukilteo to Orbetello | 5,581.64 mi (8,982.78 km) |
| Mukilteo to Oria | 5,854.25 mi (9,421.51 km) |
| Mukilteo to Oristano | 5,664.57 mi (9,116.25 km) |
| Mukilteo to Orta Nova | 5,758.39 mi (9,267.23 km) |
| Mukilteo to Orte | 5,609.54 mi (9,027.68 km) |
| Mukilteo to Ortona | 5,664.88 mi (9,116.74 km) |
| Mukilteo to Orvieto | 5,587.15 mi (8,991.65 km) |
| Mukilteo to Orzinuovi | 5,372.67 mi (8,646.47 km) |
| Mukilteo to Osimo | 5,573.97 mi (8,970.43 km) |
| Mukilteo to Ospitaletto | 5,366.86 mi (8,637.13 km) |
| Mukilteo to Ostuni | 5,838.59 mi (9,396.30 km) |
| Mukilteo to Ottaviano | 5,758.59 mi (9,267.55 km) |
| Mukilteo to Ovada | 5,385.57 mi (8,667.24 km) |
| Mukilteo to Ozieri | 5,635.30 mi (9,069.15 km) |
| Mukilteo to Paceco | 5,885.16 mi (9,471.25 km) |
