»»Continental Goes to Cashless Cabin
Beginning today, Continental Airlines flight crews will accept only credit and debit cards for on-board purchases, except for Duty-free.

The airline’s flight crews will use hand-held credit card readers to handle the on-board transactions.
Cash is still being accepted on Continental Express, Continental Connection and Continental Micronesia flights, though Continental has plans to switch to a cash-free cabins on those flights in the first quarter of 2010.
Also for service to and from China, Continental continues to accept cash as the airline is going on to develop its process for accepting the China’s predominant credit card, The China Union Pay card.
Continental says it is making the change in response to feedback from customers and flight crews who expressed interest in using card readers for on-board purchases to eliminate the hassle of fumbling for money and making correct change. (source)
