| Waltham to Oakleaf Plantation (Florida) | 1,028.15 mi (1,654.64 km) |
| Waltham to Oakley (California) | 2,641.01 mi (4,250.30 km) |
| Waltham to Oakton (Virginia) | 399.09 mi (642.27 km) |
| Waltham to Oakville (Missouri) | 1,037.32 mi (1,669.41 km) |
| Waltham to Oatfield (Oregon) | 2,521.38 mi (4,057.76 km) |
| Waltham to Ocala (Florida) | 1,096.54 mi (1,764.71 km) |
| Waltham to Ocean Acres (New Jersey) | 241.77 mi (389.09 km) |
| Waltham to Ocean City (New Jersey) | 278.06 mi (447.50 km) |
| Waltham to Ocean Pines (Maryland) | 344.57 mi (554.54 km) |
| Waltham to Ocean Pointe (Hawaii) | 5,080.00 mi (8,175.47 km) |
| Waltham to Ocean Springs (Mississippi) | 1,274.91 mi (2,051.77 km) |
| Waltham to Oceanside (California) | 2,560.18 mi (4,120.21 km) |
| Waltham to Oceanside (New York) | 173.38 mi (279.03 km) |
| Waltham to Ocoee (Florida) | 1,114.07 mi (1,792.93 km) |
| Waltham to Oconomowoc (Wisconsin) | 875.25 mi (1,408.57 km) |
