[1] Sūduva Marijampolė began the season as defending champions having won their first league title last year.
They secured a second consecutive title in ARVI Football Arena on 7 November, after they beaten Atlantas 6–0.
The winner on aggregate score after both matches earned entry into the 2019 A Lyga.
Palanga won 5–0 on aggregate and therefore both clubs remain in their respective leagues.
Updated to games played on 11 November 2018Source: A Lyga, Lietuvos FutbolasNotes:1: Team played last season in the I Lyga Awards were presented at the Lithuanian Football Awards ceremony, which was held on 21 February 2019.