After a brief review of the research on late Antique and Early Medieval glass in Illyricum, the paper discusses the preliminary results obtained from the typological and archaeometric study (through LA-ICP-MS) of glass vessels and beads from Lezha and Komani. These sites are located in north-west Albania: Lezha (ancient Lissos, situated on the Adriatic coast) and Komani (known also with the toponym Dalmace, in the nearby inland), both in the Drini valley. Although Komani and Lezha inherited a very different past, they reflect comparable phenomena of transition between late Antiquity and the Middle Ages, both in terms of settlement patterns and the social structure of their inhabitants. The archaeological research carried out on both sites reveals a particularly rich medieval funerary and ecclesiastical contexts, dating from the 6th to the 12th century. This study aims to analyze production and trade in Western Illyricum between the 4th and 11th centuries, comparing the commercial dynamics of the two sites. At Lezha, the typology and chemical signature of the beads, found mostly in 7th-8th century contexts, reveal a western or local supply route. Komani beads, found in 9th-11th century graves, were mainly imported from the Abbasid Caliphate. On the other hand, vessels, lamps and unguentaria, found in churches, were probably produced within the Byzantine Empire and are similar to examples from Northern Greece. Beads and vessels, used respectively by the civic and ecclesiastic elites, follow two different commercial circuits within the same site. In conclusion, the differences between the commercial networks of the two sites, Lezha turned to the Adriatic and Komani connected with the Steppe testify to economic changes that took place between the 7th and 9th centuries.