| Efringen-Kirchen to Olympia Heights (Florida) | 4,832.45 mi (7,777.08 km) |
| Efringen-Kirchen to Omaha (Nebraska) | 4,725.53 mi (7,605.00 km) |
| Efringen-Kirchen to On Top of the World Designated Place (Florida) | 4,756.12 mi (7,654.23 km) |
| Efringen-Kirchen to Onalaska (Wisconsin) | 4,422.07 mi (7,116.64 km) |
| Efringen-Kirchen to Oneida (New York) | 3,851.91 mi (6,199.05 km) |
| Efringen-Kirchen to Oneonta (New York) | 3,852.75 mi (6,200.41 km) |
| Efringen-Kirchen to Ontario (California) | 5,852.88 mi (9,419.31 km) |
| Efringen-Kirchen to Ontario (Oregon) | 5,262.79 mi (8,469.65 km) |
| Efringen-Kirchen to Opa-locka (Florida) | 4,820.26 mi (7,757.45 km) |
| Efringen-Kirchen to Opelika (Alabama) | 4,719.00 mi (7,594.50 km) |
| Efringen-Kirchen to Opelousas (Louisiana) | 5,102.48 mi (8,211.64 km) |
| Efringen-Kirchen to Orange (California) | 5,873.27 mi (9,452.11 km) |
| Efringen-Kirchen to Orange (Texas) | 5,191.51 mi (8,354.93 km) |
| Efringen-Kirchen to Orange City (Florida) | 4,720.62 mi (7,597.11 km) |
| Efringen-Kirchen to Orangeburg (South Carolina) | 4,488.41 mi (7,223.39 km) |
