| Tonypandy to Olympia Heights (Florida) | 4,294.21 mi (6,910.87 km) |
| Tonypandy to Omaha (Nebraska) | 4,164.63 mi (6,702.32 km) |
| Tonypandy to On Top of the World Designated Place (Florida) | 4,207.68 mi (6,771.61 km) |
| Tonypandy to Onalaska (Wisconsin) | 3,860.67 mi (6,213.14 km) |
| Tonypandy to Oneida (New York) | 3,290.69 mi (5,295.85 km) |
| Tonypandy to Oneonta (New York) | 3,292.41 mi (5,298.63 km) |
| Tonypandy to Ontario (California) | 5,306.60 mi (8,540.15 km) |
| Tonypandy to Ontario (Oregon) | 4,732.29 mi (7,615.89 km) |
| Tonypandy to Opa-locka (Florida) | 4,281.80 mi (6,890.89 km) |
| Tonypandy to Opelika (Alabama) | 4,161.67 mi (6,697.56 km) |
| Tonypandy to Opelousas (Louisiana) | 4,541.85 mi (7,309.40 km) |
| Tonypandy to Orange (California) | 5,327.02 mi (8,573.01 km) |
| Tonypandy to Orange (Texas) | 4,630.17 mi (7,451.53 km) |
| Tonypandy to Orange City (Florida) | 4,174.07 mi (6,717.52 km) |
| Tonypandy to Orangeburg (South Carolina) | 3,934.70 mi (6,332.29 km) |
