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I'll summarize the answers the question received in the comments: 1) Just use the usual tools for historic flight data (FR24, FlightAware, flighstats) and look at pre-COVID data 2) Find the list of cancelled flights due to COVID-19.
- Just use the usual tools for historic flight data (FR24, FlightAware, flighstats…) on a few dates in 2019. Make sure you look at all days of the week, and during various periods of the year, some routes have significant variability over the year. – jcaron Mar 13 at 12:51
- It is conceivable that someone compiled the list of cancelled flights due to COVID-19 – Franck Dernoncourt Mar 13 at 0:42