The only time you might experience a issue is during the peak travel days at Thanksgiving or Christmas or if there is sustained severe weather. Even then chances your fight will be disrupted are slim. Staffing is tight at all the airlines and airline managements were over scheduling trying to capture returning revenue. They have ramped the flying back down to match capacity and staffing. Many airlines functioned at a very high rate this summer. Delta set records for both completion rate and on time performance. The covid vaccination flap is a blip that will go away quickly. One of the issues is that pilots can’t fly for 48 hours after getting vaccinated. With most pilots now vaccinated that issue is fading. Most airlines in order to encourage voluntary vaccinations offered to drop and pay for trips aircrew missed because of this rule. Strangely managements were surprised to find large numbers of pilots vaccinating over holidays. This hurt Delta badly as a example last Easter. All that is pretty much in the rear view mirror now.