| Waltham to Lombard (Illinois) | 858.81 mi (1,382.12 km) |
| Waltham to Lomita (California) | 2,593.37 mi (4,173.63 km) |
| Waltham to Lompoc (California) | 2,675.76 mi (4,306.23 km) |
| Waltham to London (Ohio) | 656.90 mi (1,057.19 km) |
| Waltham to Lone Tree (Colorado) | 1,754.18 mi (2,823.08 km) |
| Waltham to Long Beach (California) | 2,585.56 mi (4,161.06 km) |
| Waltham to Long Beach (Mississippi) | 1,293.17 mi (2,081.16 km) |
| Waltham to Long Beach (New York) | 176.64 mi (284.27 km) |
| Waltham to Long Branch (New Jersey) | 203.05 mi (326.78 km) |
| Waltham to Longmont (Colorado) | 1,753.09 mi (2,821.32 km) |
| Waltham to Longview (Texas) | 1,452.28 mi (2,337.22 km) |
| Waltham to Longview (Washington) | 2,526.65 mi (4,066.25 km) |
| Waltham to Longwood (Florida) | 1,101.36 mi (1,772.47 km) |
| Waltham to Lorain (Ohio) | 565.97 mi (910.83 km) |
| Waltham to Lorton (Virginia) | 404.06 mi (650.27 km) |
