Flight Crew Private; Flight Crew Instrument
Flight Crew Last 90 Days 40; Flight Crew Total 925; Flight Crew Type 350
Time Pressure; Troubleshooting; Communication Breakdown; Situational Awareness; Other / Unknown
ATC Issue All Types; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Staffing
I may not have closed my IFR flight plan until an hour after landing. I flew in yesterday and the Tower had closed during my flight (I think for COVID). It's a very busy airport with lots of private and commercial jets. After being cleared for the approach by SCT TRACON; airport was far busier than normal and non-controlled. I simply do not remember if I cancelled in the air or not. Regardless; I tried to cancel about 20 minutes after landing when I doubted if I canceled in the air. It took me over 45 minutes to get a human on the phone. I called Weather-brief repeatedly and 1) the new menu isn't friendly without an account. 2) I was on hold forever all times. I also periodically called SCT TRACON and the SNA extension was busy. I finally tried BUR; got a Controller and he walked down the hall and canceled for me.What should I do? Always think about canceling. I was complacent; I never cancel there. I also should set up a WX-brief account. I also realize you can call other ATC numbers than the airport you landed at.
GA pilot reported the SNA airport Tower was closed possibly due to COVID-19 resulting in difficulty closing the IFR flight plan.