| Merriam to Olivares | 4,596.99 mi (7,398.14 km) |
| Merriam to Olivenza | 4,506.90 mi (7,253.16 km) |
| Merriam to Olot | 4,799.60 mi (7,724.21 km) |
| Merriam to Onate | 4,558.69 mi (7,336.50 km) |
| Merriam to Onda | 4,767.41 mi (7,672.40 km) |
| Merriam to Onteniente | 4,796.30 mi (7,718.91 km) |
| Merriam to Orihuela | 4,809.67 mi (7,740.42 km) |
| Merriam to Osuna | 4,652.49 mi (7,487.46 km) |
| Merriam to Ourense | 4,344.99 mi (6,992.59 km) |
| Merriam to Oviedo | 4,398.88 mi (7,079.32 km) |
| Merriam to Paiporta | 4,781.25 mi (7,694.67 km) |
| Merriam to Pajara | 4,542.92 mi (7,311.12 km) |
| Merriam to Palafolls | 4,830.85 mi (7,774.51 km) |
| Merriam to Palafrugell | 4,838.44 mi (7,786.72 km) |
| Merriam to Palamos | 4,839.84 mi (7,788.97 km) |
