To add to what was already posted.
Go to the website of the airline you will be using.
Some of them have an easy to find page about special needs/ travel with
ECVs or wheelchairs. Some don't and you will need to do a search.
That will provide information what to expect with your particular airline. That may vary a little, depending on the the airport and the location of elevators to get the
ECV down to the loading area.