| Knokke-Heist to Odessa (Texas) | 5,138.21 mi (8,269.15 km) |
| Knokke-Heist to Ogden (Utah) | 4,953.13 mi (7,971.30 km) |
| Knokke-Heist to Oildale (California) | 5,499.68 mi (8,850.89 km) |
| Knokke-Heist to Ojus (Florida) | 4,563.89 mi (7,344.88 km) |
| Knokke-Heist to Okemos (Michigan) | 3,922.25 mi (6,312.25 km) |
| Knokke-Heist to Oklahoma City (Oklahoma) | 4,770.00 mi (7,676.58 km) |
| Knokke-Heist to Okmulgee (Oklahoma) | 4,706.47 mi (7,574.32 km) |
| Knokke-Heist to Olathe (Kansas) | 4,495.45 mi (7,234.73 km) |
| Knokke-Heist to Old Jamestown (Missouri) | 4,328.76 mi (6,966.46 km) |
| Knokke-Heist to Oldsmar (Florida) | 4,562.99 mi (7,343.42 km) |
| Knokke-Heist to Olean (New York) | 3,719.62 mi (5,986.15 km) |
| Knokke-Heist to Olive Branch (Mississippi) | 4,504.79 mi (7,249.76 km) |
| Knokke-Heist to Olivehurst (California) | 5,359.70 mi (8,625.61 km) |
| Knokke-Heist to Olney (Maryland) | 3,797.53 mi (6,111.53 km) |
| Knokke-Heist to Olympia (Washington) | 4,928.19 mi (7,931.16 km) |
