| Glastonbury to Oswego (Illinois) | 3,895.64 mi (6,269.43 km) |
| Glastonbury to Oswego (New York) | 3,350.34 mi (5,391.85 km) |
| Glastonbury to Otsego (Minnesota) | 3,930.73 mi (6,325.90 km) |
| Glastonbury to Ottawa (Illinois) | 3,929.59 mi (6,324.07 km) |
| Glastonbury to Ottawa (Kansas) | 4,308.06 mi (6,933.15 km) |
| Glastonbury to Ottumwa (Iowa) | 4,083.32 mi (6,571.47 km) |
| Glastonbury to Overland (Missouri) | 4,113.89 mi (6,620.67 km) |
| Glastonbury to Overland Park (Kansas) | 4,272.02 mi (6,875.15 km) |
| Glastonbury to Overlea (Maryland) | 3,524.30 mi (5,671.81 km) |
| Glastonbury to Oviedo (Florida) | 4,220.70 mi (6,792.57 km) |
| Glastonbury to Owasso (Oklahoma) | 4,443.77 mi (7,151.55 km) |
| Glastonbury to Owatonna (Minnesota) | 3,970.49 mi (6,389.88 km) |
| Glastonbury to Owensboro (Kentucky) | 4,029.27 mi (6,484.48 km) |
| Glastonbury to Owings Mills (Maryland) | 3,533.56 mi (5,686.72 km) |
| Glastonbury to Owosso (Michigan) | 3,674.91 mi (5,914.20 km) |
