In some cases the criminals took stole mileage points, booked free trips and or upgrades.
This incidents happened in December 2014 but were announced by both the Airlines yesterday.
American has started notifying its affected customers by email on Monday, a spokeswoman said.
United Airlines spokesman Luke Punzenberger said thieves booked trips or made mileage transactions on up to three dozen accounts.
Thomas said that American would pay for a credit-watch service for one year for affected customers.
The airlines also added that other information such as credit-card numbers was not exposed.
source: www.techworm.net
