Background: Long COVID-19 is frequently observed in people who have contracted SARS-COV-2. It is characterized by a set of symptoms that can persist for months after infection and represents a challenge for all health care professionals. Among them, physiotherapists play an essential role thanks to their extensive knowledge in the rehabilitation field. To provide quality treatment, they need recommendations on which to rely. The aim of this study is to gather opinions from therapists working in Europe on the management of long COVID-19 patients in physiotherapy. Method: A Delphi method was conducted in three rounds. In the first round, participants were asked about the deficits observed in long COVID-19 patients and about tests, monitoring and treatment to be implemented during the treatment of these patients. During the second and third rounds, they were informed about the results already obtained and had to confirm their answers with 6-point Likert scales. Results: The most frequently observed impairments were pain, reduction in general physical fitness and respiratory problems. For assessment and treatment, the responses are specific to each impairment category. The 6-minute test seems to be particularly relevant for the assessment of several deficits and active approaches seem to have an essential place in the treatment. Conclusion: Our study highlighted the diversity of impairments observed by physiotherapists in long COVID-19 patients and allowed to create a consensus on the assessments and treatments to be preferred for each type of impairment. In general, active treatment should be preferred for most of the impairments for which long COVID-19 patients consult a physiotherapist.