Due to the COVID-19 pandemic in the United Kingdom, the Championship season was stopped after game 37 until further notice.

[4] On 3 June 2019, Charlton Athletic announced its first confirmed friendly taking place ahead of the 2019/20 season would be against Dagenham & Redbridge at The Chigwell Construction Stadium.

[71] On 7 June 2019, Charlton Athletic announced its had arranged a fourth friendly that would also act as long-serving defender Chris Solly's testimonial match against Aston Villa at The Valley.

[74] A final behind-closed-doors friendly against CS Gaz Metan Mediaș was organised for the club's Spanish training camp.

[78] On 2 December 2019, Charlton Athletic were drawn home to West Bromwich Albion in the third round.