You do realise that carbon “offsetting”, even with the most rigorously certified schemes, is not a viable solution for the planet let alone your conscience?
It’s part of the problem and not the solution. Like many things, it’s great for making you feel like you’re making a difference, not so much for the climate emergency.
Yes, flying less make a huge difference but it’s not the only option. We also have available to us many other effective ways to reduce your impact - eating less meat (especially beef), having fewer children, going car-free, etc. Offsetting is not one of them.