| Gallup to Nuth | 5,270.62 mi (8,482.24 km) |
| Gallup to Oegstgeest | 5,167.85 mi (8,316.85 km) |
| Gallup to Oirschot | 5,225.33 mi (8,409.36 km) |
| Gallup to Oisterwijk | 5,218.35 mi (8,398.12 km) |
| Gallup to Oldebroek | 5,202.71 mi (8,372.95 km) |
| Gallup to Oldenzaal | 5,241.83 mi (8,435.92 km) |
| Gallup to Ommen | 5,216.31 mi (8,394.85 km) |
| Gallup to Oosterend | 5,183.39 mi (8,341.86 km) |
| Gallup to Oosterhout | 5,204.38 mi (8,375.64 km) |
| Gallup to Oosterwolde | 5,191.13 mi (8,354.32 km) |
| Gallup to Oostzaan | 5,170.53 mi (8,321.16 km) |
| Gallup to Opmeer | 5,160.99 mi (8,305.82 km) |
| Gallup to Oss | 5,220.63 mi (8,401.79 km) |
| Gallup to Oud-Beijerland | 5,181.65 mi (8,339.07 km) |
| Gallup to Oudenbosch | 5,195.71 mi (8,361.69 km) |
