| Glastonbury to Odessa (Texas) | 4,919.77 mi (7,917.60 km) |
| Glastonbury to Ogden (Utah) | 4,770.36 mi (7,677.16 km) |
| Glastonbury to Oildale (California) | 5,320.61 mi (8,562.69 km) |
| Glastonbury to Ojus (Florida) | 4,310.74 mi (6,937.46 km) |
| Glastonbury to Okemos (Michigan) | 3,696.91 mi (5,949.60 km) |
| Glastonbury to Oklahoma City (Oklahoma) | 4,549.78 mi (7,322.16 km) |
| Glastonbury to Okmulgee (Oklahoma) | 4,484.16 mi (7,216.56 km) |
| Glastonbury to Olathe (Kansas) | 4,277.29 mi (6,883.63 km) |
| Glastonbury to Old Jamestown (Missouri) | 4,103.82 mi (6,604.46 km) |
| Glastonbury to Oldsmar (Florida) | 4,313.75 mi (6,942.31 km) |
| Glastonbury to Olean (New York) | 3,485.59 mi (5,609.52 km) |
| Glastonbury to Olive Branch (Mississippi) | 4,272.59 mi (6,876.06 km) |
| Glastonbury to Olivehurst (California) | 5,193.44 mi (8,358.03 km) |
| Glastonbury to Olney (Maryland) | 3,556.76 mi (5,724.05 km) |
| Glastonbury to Olympia (Washington) | 4,781.59 mi (7,695.22 km) |
