American Express Co. and Delta Air Lines on Thursday revealed details of the cobranded card program they announced last August.

After a 5,000-mile enrollment bonus, customers will earn one mile for every dollar charged to the Delta SkyMiles Optima card, up to a $60,000 annual ceiling. A 50% mileage bonus, not subject to a cap, will accrue on purchases of Delta tickets and Delta Dream Vacations.

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