| Lake Oswego to Popovo | 6,013.93 mi (9,678.48 km) |
| Lake Oswego to Provadia | 6,046.20 mi (9,730.42 km) |
| Lake Oswego to Radnevo | 6,075.96 mi (9,778.31 km) |
| Lake Oswego to Radomir | 6,001.99 mi (9,659.27 km) |
| Lake Oswego to Rakitovo | 6,060.67 mi (9,753.71 km) |
| Lake Oswego to Rakovski | 6,058.37 mi (9,750.00 km) |
| Lake Oswego to Razgrad | 6,007.26 mi (9,667.74 km) |
| Lake Oswego to Razlog | 6,054.74 mi (9,744.17 km) |
| Lake Oswego to Ruse | 5,978.39 mi (9,621.29 km) |
| Lake Oswego to Samokov | 6,027.66 mi (9,700.58 km) |
| Lake Oswego to Sandanski | 6,071.05 mi (9,770.41 km) |
| Lake Oswego to Sevlievo | 6,013.97 mi (9,678.55 km) |
| Lake Oswego to Shumen | 6,030.86 mi (9,705.74 km) |
| Lake Oswego to Silistra | 5,982.75 mi (9,628.31 km) |
| Lake Oswego to Sliven | 6,058.70 mi (9,750.53 km) |
