What Happens If You Don’t Show Up For A Flight?
Every institution, whether it is a hotel or an airline company, there are some rules and regulations on how are you do certain things. It includes booking the flight and canceling it at the last moment or not totally showing up for it. Some certain terms and conditions explain why every airline would happen if you do something wrong.
Some airlines charge the customers for missing flights if you feel that you have developed a habit of missing flights regularly. If they find that you are only booking a flight to save your money, but you cancel your trips are the last moment. But if you have a genuine reason for doing so and inform the airlines beforehand, they can manage to give the ticket to someone else, and you won't be charged.
First of all, you need to understand that there is a difference between flight cancellation and not showing up for a flight. When you cancel the ticket beforehand, you leave this place for someone else, but you don't show up at the last moment; there are no other options anyone could avail of that ticket.

This is the main reason why many airlines charge for it. In some cases, you can get some of your money back, but in order to get all your money back, you must have to pay a fine. But keep calm if you miss your flight, it doesn't mean you can't travel at all. It is not the end of life; it's just a flight miss.
Some airlines also have the policy that the refund your ticket money for the flight that you have missed in the next ticket that you purchase. But there is a time limit to that, so if you are so much worried about your money, better plan another trip right now to avail your precious dollars.
How to cancel your flight?
Canceling of flight is an easy process. You would have to simply call the airline and inform them that you would not make it to the flight. Give them all the details about your ticket and make sure that you do not need that ticket anymore so that they can sell it to anyone.

Some airlines can charge you cancellation penalties, but these penalties are lower than the actual ticket price or the fee that you would be charged if you don't show up for a flight. Calling an airline and canceling your flight shows that you are a responsible citizen.
Missing your flight purposefully.
The other method is that you have missed your flight purposefully, and now you are not ashamed at all. You are behaving as nothing has happened. To lessen this irresponsible behavior, the airlines have made some legal policies so that everyone abides by their rules and regulations.

The nature of these fines however, differs concerning the flight that you have missed. If you have missed a domestic flight, it is already cheaper, so there is a chance that you can get your money back. But if you have missed an international flight, they would charge you heavily for it.
Maybe there is no return policy at all. Or they can readjust your payment in the next ticket that you purchase from that specific airline.
How to avoid missing a flight or being charged?
There is a lot of time for check-in and stay in the waiting lounge before departure. So, if you do not want to take a particular flight or you do not have time for it, or there is a change in your plan. It is better to go to the airport and show yourself. You can talk to the airline authorities so that they would manage something else for you.
It is an ethical way to miss your flight, and maybe they will not charge you can readjust your money on the next flight. If you do not show to the airlines, make sure that you have dodged them to charge you a penalty according to their terms and conditions. So, it's better to be on time rather than missing a flight intentionally or unintentionally.