| Jefferson Hills to Oerlinghausen | 4,049.59 mi (6,517.19 km) |
| Jefferson Hills to Oestrich-Winkel | 4,085.55 mi (6,575.05 km) |
| Jefferson Hills to Offenburg | 4,132.22 mi (6,650.16 km) |
| Jefferson Hills to Oftersheim | 4,128.91 mi (6,644.83 km) |
| Jefferson Hills to Ohrdruf | 4,164.99 mi (6,702.90 km) |
| Jefferson Hills to Ohringen | 4,170.81 mi (6,712.27 km) |
| Jefferson Hills to Olbernhau | 4,269.51 mi (6,871.11 km) |
| Jefferson Hills to Olching | 4,276.90 mi (6,883.01 km) |
| Jefferson Hills to Oldenburg | 3,996.56 mi (6,431.84 km) |
| Jefferson Hills to Oldenburg in Holstein | 4,058.98 mi (6,532.30 km) |
| Jefferson Hills to Olfen | 4,008.19 mi (6,450.56 km) |
| Jefferson Hills to Olpe | 4,047.08 mi (6,513.15 km) |
| Jefferson Hills to Olsberg | 4,061.81 mi (6,536.85 km) |
| Jefferson Hills to Oranienburg | 4,194.47 mi (6,750.35 km) |
| Jefferson Hills to Ortenberg | 4,115.55 mi (6,623.33 km) |
