| Monchengladbach to Oakley (California) | 5,522.69 mi (8,887.91 km) |
| Monchengladbach to Oakton (Virginia) | 3,948.40 mi (6,354.34 km) |
| Monchengladbach to Oakville (Missouri) | 4,472.40 mi (7,197.63 km) |
| Monchengladbach to Oatfield (Oregon) | 5,102.99 mi (8,212.47 km) |
| Monchengladbach to Ocala (Florida) | 4,617.50 mi (7,431.15 km) |
| Monchengladbach to Ocean Acres (New Jersey) | 3,788.34 mi (6,096.75 km) |
| Monchengladbach to Ocean City (New Jersey) | 3,822.81 mi (6,152.21 km) |
| Monchengladbach to Ocean Pines (Maryland) | 3,885.27 mi (6,252.73 km) |
| Monchengladbach to Ocean Pointe (Hawaii) | 7,338.29 mi (11,809.83 km) |
| Monchengladbach to Ocean Springs (Mississippi) | 4,822.68 mi (7,761.35 km) |
| Monchengladbach to Oceanside (California) | 5,678.86 mi (9,139.25 km) |
| Monchengladbach to Oceanside (New York) | 3,722.56 mi (5,990.88 km) |
| Monchengladbach to Ocoee (Florida) | 4,622.31 mi (7,438.89 km) |
| Monchengladbach to Oconomowoc (Wisconsin) | 4,176.64 mi (6,721.66 km) |
| Monchengladbach to Odenton (Maryland) | 3,915.94 mi (6,302.10 km) |
