| Merrillville to Popovo | 5,271.59 mi (8,483.81 km) |
| Merrillville to Provadia | 5,322.21 mi (8,565.26 km) |
| Merrillville to Radnevo | 5,312.16 mi (8,549.09 km) |
| Merrillville to Radomir | 5,191.01 mi (8,354.13 km) |
| Merrillville to Rakitovo | 5,259.95 mi (8,465.08 km) |
| Merrillville to Rakovski | 5,277.60 mi (8,493.48 km) |
| Merrillville to Razgrad | 5,272.66 mi (8,485.53 km) |
| Merrillville to Razlog | 5,241.91 mi (8,436.04 km) |
| Merrillville to Ruse | 5,238.62 mi (8,430.74 km) |
| Merrillville to Samokov | 5,223.52 mi (8,406.45 km) |
| Merrillville to Sandanski | 5,250.09 mi (8,449.21 km) |
| Merrillville to Sevlievo | 5,247.28 mi (8,444.68 km) |
| Merrillville to Shumen | 5,299.65 mi (8,528.97 km) |
| Merrillville to Silistra | 5,270.07 mi (8,481.36 km) |
| Merrillville to Sliven | 5,307.78 mi (8,542.05 km) |
