I suspect your airline of choice will allow you to check it as oversized/odd shaped luggage, similar to how they handle skis or strollers. Assuming you’re in the USA, the “gotcha” is that the FAA has restrictions on lithium batteries. For most scooters, the battery will be bigger than the FAA specified 100Wh limit (160Wh with airline permission). See the FAA’s summary thingy. So you may be able to fly your scooter, but only without the batteries. Maybe you can arrange to rent or buy some batteries at the location you’re flying to?
I believe the rationale behind these rules is to avoid a scenario where a lithium battery catches fire (for whatever reason) and cannot be put out or contained, due to it’s size (capacity) or location (in-cabin vs checked storage).
I also don’t know if these rules are for commercial aircraft only, or if there are different rules (or lack thereof) for private aircraft.
