United Airlines says it will honor tickets it mistakenly sold for as little as $5 on Thursday.
http://money.cnn.com/2013/09/13/news/companies/united-free-fares/index.html?hpt=hp_t3
http://money.cnn.com/2013/09/13/news/companies/united-free-fares/index.html?hpt=hp_t3
