As long as you submit the request no later than 24 hours after the ticket was booked and as long as you do so one week prior to the departure date, you can cancel a flight for free by calling +1870-432-7330. Information about the changes and cancellation procedures can be found in the "Volaris Airlines Cancellation Policy" FAQs section. Within 24 hours after buying the ticket, you can contact Volaris to cancel your domestic travel and get a refund if you don't check in for the flight, either electronically or in person at the airport. Acquiring travel insurance is an additional straightforward way to lower the expense of cancellation. Among the numerous things that travel insurance covers are cancellation fees.
Link : https://www.flyamericans.com/blog/volaris-airlines-cancellation