| Suffolk to Olympia (Washington) | 2,445.85 mi (3,936.21 km) |
| Suffolk to Olympia Heights (Florida) | 788.73 mi (1,269.34 km) |
| Suffolk to Omaha (Nebraska) | 1,086.73 mi (1,748.92 km) |
| Suffolk to On Top of the World Designated Place (Florida) | 617.99 mi (994.55 km) |
| Suffolk to Onalaska (Wisconsin) | 912.50 mi (1,468.52 km) |
| Suffolk to Oneida (New York) | 443.95 mi (714.47 km) |
| Suffolk to Oneonta (New York) | 406.66 mi (654.46 km) |
| Suffolk to Ontario (California) | 2,297.97 mi (3,698.23 km) |
| Suffolk to Ontario (Oregon) | 2,160.31 mi (3,476.69 km) |
| Suffolk to Opa-locka (Florida) | 775.66 mi (1,248.30 km) |
| Suffolk to Opelika (Alabama) | 568.98 mi (915.68 km) |
| Suffolk to Opelousas (Louisiana) | 983.89 mi (1,583.41 km) |
| Suffolk to Orange (California) | 2,314.49 mi (3,724.81 km) |
| Suffolk to Orange (Texas) | 1,084.74 mi (1,745.72 km) |
| Suffolk to Orange City (Florida) | 600.08 mi (965.74 km) |
