It seems to me that flying is not spreading the virus as much as we are led to believe. Most of the spikes have been down to meat processing factories and farms. The labourers on the farms tend to live in tightly packed dormitories probably with poor ventilation.
What people do when they get to their destination (holiday resort or home town) is outside the remit of the airports & airlines. You would think that a video showing boozed up Germans & Brits in Majorca only happens whilst on they are on holiday - it happens on a regular basis in may towns throughout the UK every weekend, although the media don't pick up on this.