The May, 2020 Airline Pet Travel Report contains pet incidents for the month of March, 2020.
March had one death of a cat on Delta Airlines. The 18-week-old male Sphynx Cat "Chloe" weighing 3lb 2oz was traveling non-stop from NYC to PHX where Delta personnel in PHX found Chloe unresponsive and immediately transported him to local Veterinary services for evaluation. Local Veterinary services in PHX determined Chloe had died. Reports determined Chloe suffered from pre-existing medical conditions.
Source: May 2020 Air Travel Consumer Report.