Its insistence on not charging for baggage has long made it a passenger favorite, but Southwest Airlines have now worked out how to keep passengers loyal -- by announcing that vouchers with the airline will no longer have an expiration date.
원문출처 : https://www.cnn.com/travel/article/southwest-airlines-voucher-expiration/index.html
원문출처 : https://www.cnn.com/travel/article/southwest-airlines-voucher-expiration/index.html