| Family | Axiniidae Colless, 1994
| 0 0 | Genera Species |
| Family | Calliphoridae Brauer & Bergenstamm, 1889 Blow flies, Blow Fly, Blow-flies, Blowflies, Blue-bottles | 343 3791 | Genera Species |
| Family | Cuterebridae Blake, 1938 ⇒ Cuterebrinae
| 1 1 | Genus Species |
| Family | Gasterophilidae Weise, 1900 ⇒ Gasterophilinae Horse bots | 2 0 | Genera Species |
| Family | Hypodermatidae Rondani, 1856
| 1 0 | Genus Species |
| Family | Mystacinobiidae Holloway, 1976
| 0 0 | Genera Species |
| Family | Oestridae Leach, 1815 Bot flies, Bot fly, Bot-fly, Botflies, Botfly, Bott fly | 83 466 | Genera Species |
| Family | Phasiidae Brauer & Bergenstamm, 1889
| 0 0 | Genera Species |
| Family | Rhiniidae Brauer & Bergenstamm, 1889
| 28 167 | Genera Species |
| Family | Rhinophoridae Robineau-Desvoidy, 1863 Woodlouse flies | 71 399 | Genera Species |
| Family | Sarcophagidae Macquart, 1834 Flesh flies, Flesh fly, Flesh-fly, Woodlouse flies | 865 7191 | Genera Species |
| Family | Tachinidae Robineau-Desvoidy, 1830 ⇒ Tachyporini Bristle Flies, Parasite flies, Parasitic Flies, Tachinids | 3482 21175 | Genera Species |