Lol come on now. It will be a beyond negligible amount considering 75% of that CO2 existed 20 years ago. How many climate change events are there annually? How many private planes go to these events?
In 2021 Heathrow Airport had 195,000 planes arrive or depart. Over 500 flights a day. I'd wager there's more CO2 produced in one day at Heathrow than from a year's worth of private jets attending climate change events.
Heathrow isn't even close to being one of the busiest airports in the world. That award goes to Atlanta with, on average, 2,700 arrivals and departures daily.