Delta operated a different buy on board program between 2003 and 2005.

Delta and its regional airlines operate about 3,000 daily flights.

Delta operates a fleet of 722 aircraft with 4,804 flights per day.

Delta operated about 40 percent of its usual number of flights.

Delta operated this round trip service with a Convair 440 propliner.

American, Delta and United also operate on a case-by-case basis.

Delta will operate passenger and cargo service to Manchester from Atlanta.

Mr. Murphy said the deal would allow Delta to operate a bit more efficiently.

Delta also operates a call center for reservations and sales as well as regional corporate offices.

Delta will accept for delivery and operate 9 of the new A310's it has already ordered, he added.