When purchasing a non-refundable fare the traveler can cancel their ticket and the value of that purchase is available for the traveler to use within one year of the original purchase. After a year the travel fund credit expires. Expired travel fund credit can be re-instated as a a voucher valid for 6 months with a $100 reduction in value by contacting Southwest within 6 months of expiration.
Since you did not provide purchase date or date of cancellation I cannot tell you if the travel fund has expired or is still valid. The original purchaser can contact Southwest or use this web page to verify travel funds https://www.southwest.com/travel-funds/
Contact Customer Relations
--TheMiddleSeat
