| Ottumwa to Devnya | 5,523.57 mi (8,889.32 km) |
| Ottumwa to Dimitrovgrad | 5,516.39 mi (8,877.76 km) |
| Ottumwa to Dobrich | 5,514.34 mi (8,874.47 km) |
| Ottumwa to Dospat | 5,486.33 mi (8,829.40 km) |
| Ottumwa to Dupnitsa | 5,418.40 mi (8,720.08 km) |
| Ottumwa to Elhovo | 5,543.78 mi (8,921.85 km) |
| Ottumwa to Etropole | 5,421.13 mi (8,724.47 km) |
| Ottumwa to Gabrovo | 5,465.70 mi (8,796.20 km) |
| Ottumwa to Gorna Oryahovitsa | 5,464.75 mi (8,794.67 km) |
| Ottumwa to Gotse Delchev | 5,475.11 mi (8,811.33 km) |
| Ottumwa to Harmanli | 5,532.74 mi (8,904.08 km) |
| Ottumwa to Haskovo | 5,521.16 mi (8,885.46 km) |
| Ottumwa to Ihtiman | 5,434.49 mi (8,745.97 km) |
| Ottumwa to Isperih | 5,473.30 mi (8,808.42 km) |
| Ottumwa to Kardzhali | 5,528.59 mi (8,897.40 km) |
