...and it looks like that's about it... surprisingly.

Delta to cap its narrowbody order at 100 737-900ERs
By Jon Ostrower

Delta Air Lines will purchase 100 Boeing 737-900ER aircraft in a bid to replace its ageing 757 fleet, but the carrier has delayed a decision on 100 more smaller narrowbody aircraft, industry sources confirm.

The exact timing of the announcement by Delta is unclear, say those familiar with the deal, but a formal announcement could come as early as this week.

Delta's search for a 757 replacement excluded the re-engined single aisle offerings from both Airbus and Boeing, the sources noted.

Boeing declined to comment on customer negotiations and Delta was unavailable for comment.

If confirmed, the order would be the largest single order for the 737-900ER, which entered service with Indonesia's Lion Air in 2007.