You can easily get the refund from the southwest airline. The ticket can be well converted to the flight credit and also you can use it for the future flight. So have to pay the difference in the amount. Also, the southwest airline will also charge and ask for the credit. The flight credit can be non-refundable. The value of the credit you earn after cancellation can able to buy the future flight ticket from the flight credit. Be take care of the departure of the flight and its timings.