| Guymon to Olympia Heights (Florida) | 1,455.94 mi (2,343.10 km) |
| Guymon to Omaha (Nebraska) | 429.59 mi (691.35 km) |
| Guymon to On Top of the World Designated Place (Florida) | 1,227.42 mi (1,975.35 km) |
| Guymon to Onalaska (Wisconsin) | 734.00 mi (1,181.26 km) |
| Guymon to Oneida (New York) | 1,431.39 mi (2,303.59 km) |
| Guymon to Oneonta (New York) | 1,455.23 mi (2,341.97 km) |
| Guymon to Ontario (California) | 925.86 mi (1,490.03 km) |
| Guymon to Ontario (Oregon) | 958.20 mi (1,542.08 km) |
| Guymon to Opa-locka (Florida) | 1,452.96 mi (2,338.31 km) |
| Guymon to Opelika (Alabama) | 954.89 mi (1,536.75 km) |
| Guymon to Opelousas (Louisiana) | 687.69 mi (1,106.73 km) |
| Guymon to Orange (California) | 942.31 mi (1,516.51 km) |
| Guymon to Orange (Texas) | 635.16 mi (1,022.19 km) |
| Guymon to Orange City (Florida) | 1,285.56 mi (2,068.92 km) |
| Guymon to Orangeburg (South Carolina) | 1,183.53 mi (1,904.70 km) |
