Delta said the new structure was not a fare increase.
In the future, the transaction may be done without the need of a gate agent, Delta said.
Moreover, Delta said its cash probably dropped to about $1.45 billion during the third quarter.
Delta said that 40 a month have left recently.
Delta said the move was essentially neutral to its revenue.
Delta has said a strike would put it out of business.
Delta said it expected the move to hurt revenue initially.
Northwest, Delta and others said they were studying the plan.
Delta said it paid more than $1 billion in travel agency commissions last year.
United and Delta say that their alliance will bring them $600 million in additional revenue every year.