| Welver to Oakley (California) | 5,541.09 mi (8,917.53 km) |
| Welver to Oakton (Virginia) | 3,997.40 mi (6,433.19 km) |
| Welver to Oakville (Missouri) | 4,513.83 mi (7,264.31 km) |
| Welver to Oatfield (Oregon) | 5,116.05 mi (8,233.49 km) |
| Welver to Ocala (Florida) | 4,670.48 mi (7,516.42 km) |
| Welver to Ocean Acres (New Jersey) | 3,838.35 mi (6,177.23 km) |
| Welver to Ocean City (New Jersey) | 3,873.02 mi (6,233.03 km) |
| Welver to Ocean Pines (Maryland) | 3,935.88 mi (6,334.19 km) |
| Welver to Ocean Pointe (Hawaii) | 7,326.64 mi (11,791.10 km) |
| Welver to Ocean Springs (Mississippi) | 4,870.80 mi (7,838.79 km) |
| Welver to Oceanside (California) | 5,703.89 mi (9,179.52 km) |
| Welver to Oceanside (New York) | 3,772.18 mi (6,070.74 km) |
| Welver to Ocoee (Florida) | 4,676.02 mi (7,525.33 km) |
| Welver to Oconomowoc (Wisconsin) | 4,215.45 mi (6,784.11 km) |
| Welver to Odenton (Maryland) | 3,965.15 mi (6,381.28 km) |
