If you are asking "Can I sell my non-refundable airline ticket?" you are not the only one! Many people cannot use their non-recoverable flights and are not sure what to do with them. Many people do not know that anything has to be done!
How to sell a plane ticket
You can transfer your flight to someone else if your airline allows you to change the name associated with the flight. There is always a fee for changing the name and they vary. Most low cost airlines offer name changes as part of their official policies, and you can easily do so from your airline account. You can check whether your airline allows changes to their website name or by calling customer service. Some regular airlines that do not allow the name change as an official policy make exceptions for their clients – I have seen many cases where airlines have deviated from their general terms and conditions to please the client and pocket money from fees. So it's always worth calling your airline's customers and trying to convince them to let you change your name for a fee.
If you are selling a return flight, you will usually need to sell the two legs of the trip together. This is because both flights are under one reservation and airlines usually allow you to change the name of the entire reservation rather than parts of it. If you have already used an outbound flight, it is unlikely that the airline will allow you to change the name of the inbound flight.
You can change the dates and destinations of your flight
It's also helpful to know that many airlines allow you to change the dates and destinations for your flight departure and arrival. Even if you can't fly at all but find a buyer who can travel but needs different dates, you can also change the dates of your flight. Airlines usually charge a separate fee for this.
Sometimes you have to pay the difference of the tariff
If you change your flight name or change dates and / or destinations, some airlines ask you to pay the difference between the price you paid when booking the flight and the current live flight price at the time of the change. If you know you will change both fields and name, change them together so you don't pay any more fees.