Nonenveloped viruses are generally thought to disseminate as individual naked particles released after cell lysis. Here, we show that bluetongue virus (BTV), a nonenveloped arbovirus, can instead disseminate before overt cell lysis as infectious units associated with migrasomes. These structures, which we term BTV-migrions, package multiple virions together with selected viral RNAs and replication-associated proteins, thereby delivering coordinated viral cargo rather than isolated virions. This composite cargo accelerates viral replication in recipient cells. Moreover, enclosure within a host-derived migrasome membrane enhances viral attachment and entry and protects virions from antibody-mediated neutralization. Mechanistically, the BTV core protein VP7 promotes migrasome biogenesis through RGD-dependent activation of integrin α5β1, whereas an actin-myosin Va transport module facilitates the selective loading of viral cargo. Together, these findings identify migrasomes as virus-exploited transmission organelles and reveal a previously unrecognized nonlytic dissemination strategy through which a nonenveloped arbovirus generates protected, highly infectious cargo-delivery units.