| Houston to Nyon | 5,262.87 mi (8,469.77 km) |
| Houston to Oberriet | 5,367.31 mi (8,637.85 km) |
| Houston to Obersiggenthal | 5,309.96 mi (8,545.56 km) |
| Houston to Oberwil | 5,279.17 mi (8,496.00 km) |
| Houston to Oberwingert | 5,328.16 mi (8,574.85 km) |
| Houston to Oftringen | 5,300.61 mi (8,530.50 km) |
| Houston to Olten | 5,298.78 mi (8,527.57 km) |
| Houston to Onex | 5,263.97 mi (8,471.54 km) |
| Houston to Opfikon | 5,322.92 mi (8,566.41 km) |
| Houston to Ostermundigen | 5,295.54 mi (8,522.35 km) |
| Houston to Payerne | 5,277.36 mi (8,493.09 km) |
| Houston to Pfaffikon | 5,333.99 mi (8,584.22 km) |
| Houston to Plan-les-Ouates | 5,265.22 mi (8,473.56 km) |
| Houston to Pratteln | 5,284.96 mi (8,505.32 km) |
| Houston to Prilly | 5,273.11 mi (8,486.25 km) |
