| Tulsa to Popovo | 5,852.51 mi (9,418.70 km) |
| Tulsa to Provadia | 5,902.10 mi (9,498.52 km) |
| Tulsa to Radnevo | 5,894.73 mi (9,486.64 km) |
| Tulsa to Radomir | 5,775.85 mi (9,295.33 km) |
| Tulsa to Rakitovo | 5,844.51 mi (9,405.83 km) |
| Tulsa to Rakovski | 5,861.06 mi (9,432.47 km) |
| Tulsa to Razgrad | 5,853.04 mi (9,419.56 km) |
| Tulsa to Razlog | 5,827.07 mi (9,377.76 km) |
| Tulsa to Ruse | 5,819.17 mi (9,365.05 km) |
| Tulsa to Samokov | 5,808.11 mi (9,347.26 km) |
| Tulsa to Sandanski | 5,835.72 mi (9,391.68 km) |
| Tulsa to Sevlievo | 5,829.70 mi (9,382.00 km) |
| Tulsa to Shumen | 5,879.94 mi (9,462.85 km) |
| Tulsa to Silistra | 5,848.82 mi (9,412.76 km) |
| Tulsa to Sliven | 5,889.48 mi (9,478.21 km) |
