| Round Rock to Oschatz | 5,399.37 mi (8,689.45 km) |
| Round Rock to Oschersleben | 5,305.70 mi (8,538.70 km) |
| Round Rock to Osnabruck | 5,180.91 mi (8,337.86 km) |
| Round Rock to Ostbevern | 5,182.12 mi (8,339.82 km) |
| Round Rock to Osterburg | 5,294.84 mi (8,521.23 km) |
| Round Rock to Ostercappeln | 5,185.18 mi (8,344.74 km) |
| Round Rock to Osterhofen | 5,498.66 mi (8,849.24 km) |
| Round Rock to Osterholz-Scharmbeck | 5,174.57 mi (8,327.66 km) |
| Round Rock to Osternienburg | 5,341.22 mi (8,595.86 km) |
| Round Rock to Osterode | 5,280.74 mi (8,498.52 km) |
| Round Rock to Osterwieck | 5,288.55 mi (8,511.09 km) |
| Round Rock to Ostfildern | 5,354.49 mi (8,617.21 km) |
| Round Rock to Osthofen | 5,283.55 mi (8,503.05 km) |
| Round Rock to Ostrhauderfehn | 5,135.98 mi (8,265.56 km) |
| Round Rock to Ostringen | 5,315.90 mi (8,555.11 km) |
