In addition to Årvoll IL, 62 other teams from 5 different countries played in Boys 18/19 - born 2000 - 11 aside. They were divided into 16 different groups, whereof Årvoll IL junior could be found in Group 4 together with Nordre Land IL, SK Vedavåg Karmøy and Lørenskog.

Årvoll IL junior continued to Playoff B after reaching 3:rd place in Group 4. In the playoff they made it to 1/4 Final, but lost it against Vardeneset BK with 1-2. In the Final, Drøbak-Frogn IL won over Hallingdal FK and became the winner of Playoff B in Boys 18/19 - born 2000 - 11 aside.

Årvoll IL also participated in Boys 18/19 - born 1999 - 11 aside during Norway Cup 2018. They reached the 1/4 Final in B19-11-12 Playoff A, but lost it against Lizzy Football Club with 0-1.