| Briancon to Olympia Heights (Florida) | 4,844.86 mi (7,797.04 km) |
| Briancon to Omaha (Nebraska) | 4,809.03 mi (7,739.39 km) |
| Briancon to On Top of the World Designated Place (Florida) | 4,781.81 mi (7,695.58 km) |
| Briancon to Onalaska (Wisconsin) | 4,504.02 mi (7,248.52 km) |
| Briancon to Oneida (New York) | 3,906.25 mi (6,286.50 km) |
| Briancon to Oneonta (New York) | 3,904.08 mi (6,283.02 km) |
| Briancon to Ontario (California) | 5,961.73 mi (9,594.47 km) |
| Briancon to Ontario (Oregon) | 5,386.57 mi (8,668.85 km) |
| Briancon to Opa-locka (Florida) | 4,832.95 mi (7,777.87 km) |
| Briancon to Opelika (Alabama) | 4,760.63 mi (7,661.49 km) |
| Briancon to Opelousas (Louisiana) | 5,152.45 mi (8,292.06 km) |
| Briancon to Orange (California) | 5,982.15 mi (9,627.34 km) |
| Briancon to Orange (Texas) | 5,244.02 mi (8,439.44 km) |
| Briancon to Orange City (Florida) | 4,743.73 mi (7,634.29 km) |
| Briancon to Orangeburg (South Carolina) | 4,523.23 mi (7,279.43 km) |
