| Ottawa to Lombard (Illinois) | 55.10 mi (88.68 km) |
| Ottawa to Lomita (California) | 1,687.87 mi (2,716.36 km) |
| Ottawa to Lompoc (California) | 1,772.90 mi (2,853.21 km) |
| Ottawa to London (Ohio) | 300.03 mi (482.86 km) |
| Ottawa to Lone Tree (Colorado) | 851.79 mi (1,370.83 km) |
| Ottawa to Long Beach (California) | 1,680.01 mi (2,703.72 km) |
| Ottawa to Long Beach (Mississippi) | 759.90 mi (1,222.93 km) |
| Ottawa to Long Beach (New York) | 791.62 mi (1,274.00 km) |
| Ottawa to Long Branch (New Jersey) | 778.08 mi (1,252.19 km) |
| Ottawa to Longmont (Colorado) | 854.36 mi (1,374.96 km) |
| Ottawa to Longview (Texas) | 692.53 mi (1,114.52 km) |
| Ottawa to Longview (Washington) | 1,721.76 mi (2,770.91 km) |
| Ottawa to Longwood (Florida) | 970.32 mi (1,561.57 km) |
| Ottawa to Lorain (Ohio) | 344.22 mi (553.97 km) |
| Ottawa to Lorton (Virginia) | 640.51 mi (1,030.80 km) |
