| Upplands Vasby to Olympia Heights (Florida) | 4,977.20 mi (8,010.02 km) |
| Upplands Vasby to Omaha (Nebraska) | 4,531.07 mi (7,292.05 km) |
| Upplands Vasby to On Top of the World Designated Place (Florida) | 4,842.20 mi (7,792.76 km) |
| Upplands Vasby to Onalaska (Wisconsin) | 4,247.00 mi (6,834.89 km) |
| Upplands Vasby to Oneida (New York) | 3,839.29 mi (6,178.74 km) |
| Upplands Vasby to Oneonta (New York) | 3,854.70 mi (6,203.54 km) |
| Upplands Vasby to Ontario (California) | 5,492.07 mi (8,838.64 km) |
| Upplands Vasby to Ontario (Oregon) | 4,838.78 mi (7,787.27 km) |
| Upplands Vasby to Opa-locka (Florida) | 4,964.14 mi (7,989.01 km) |
| Upplands Vasby to Opelika (Alabama) | 4,731.31 mi (7,614.30 km) |
| Upplands Vasby to Opelousas (Louisiana) | 5,060.79 mi (8,144.55 km) |
| Upplands Vasby to Orange (California) | 5,511.70 mi (8,870.23 km) |
| Upplands Vasby to Orange (Texas) | 5,134.42 mi (8,263.06 km) |
| Upplands Vasby to Orange City (Florida) | 4,820.08 mi (7,757.17 km) |
| Upplands Vasby to Orangeburg (South Carolina) | 4,541.87 mi (7,309.43 km) |
