https://www.siliconvalley.com/2022/07/11/travel-troubleshooter-allegiant-air-left-my-home-airport-what-do-i-do-with-this-credit/

DEAR TRAVEL TROUBLESHOOTER: I recently had to cancel a flight on Allegiant Air after having an accident. The airline sent me a voucher for $117. Shortly after that, Allegiant announced that it was discontinuing service to our home airport, Cleveland Hopkins International Airport. I’m certain I will not be able to use this voucher.

I’ve sent Allegiant three polite emails asking for a refund, but it isn’t responding. Could you help me get a refund?