Welcome aboard Suzie1. Pleased you found this site, it is very helpful especially in light of what we sometimes experience from the so called experts.

For air travel I always use headphones or ear plugs, and inhale frequently on eucalyptus oil on hanky or better still a nasal Vicks type stick you put up your nose.

This works a treat also for when my ears have that fullness, echoing, balance feeling ( hard to describe) and blocking off airflow to nose and blow, so popping occurs which clears away or lessons the density of effect.

What works for one doesn't always work for another so anything is worth trying.