"We’re Cashless Onboard
In order to expedite our onboard payment process, we'll only accept credit cards—no cash—beginning December 1, 2009 on Delta and Northwest Airlines® flights traveling within North America, including the United States, Canada, Mexico, Central America, Bermuda, and the Caribbean.
Cash and credit will continue to be accepted on all trans-Atlantic, trans-Pacific and South American flights as well as for all duty-free items.
Please keep in mind:
Credit cards accepted onboard include American Express, Diners Club International®, Discover®, Japan Credit Bureau (JCB), MasterCard®, and Visa.
Passengers under our unaccompanied minor program receive one complimentary non-perishable and one perishable item, when available.
A selection of complimentary snacks and nonalcoholic beverages are offered on flights traveling 250 miles or more.
Credit card payments are not yet accepted on Delta Connection® flights."