[2] The season was curtailed as a result, with Celtic declared Scottish Premiership champions on 18 May, winning a ninth consecutive league title.

On 8 December, Celtic won the Scottish League Cup for the fourth consecutive season, defeating Rangers 1–0 in the final.

On 24 November, Celtic were drawn to face Partick Thistle at Firhill Stadium in the fourth round of the 2019–20 Scottish Cup.

[16] Goals from Olivier Ntcham, Scott Brown and Vakoun Issouf Bayo sealed Celtic's place in the quarter-finals.

On 18 June, Celtic were drawn to face Sarajevo (Bosnia and Herzegovina) in the first qualifying round of the UEFA Champions League.

On 17 July, it was determined that Celtic would face Nõmme Kalju (Estonia) in the second qualifying round of the UEFA Champions League.

On 30 July, it was determined that Celtic would face CFR Cluj (Romania) in the third qualifying round of the UEFA Champions League.

On 15 August, it was determined that Celtic would face AIK (Sweden) in the play-off round of the UEFA Europa League.

[24] Neil Lennon's side recorded a comfortable 6–1 win on aggregate and secured a place in the 2019–20 UEFA Europa League group stage.