When it comes to ground services, it's whoever's gonna do it the cheapest. I've been at PCL 3 years, and I've seen a couple of stations under a couple of different handling companies. Under NWA, they'd normally just take the cheapest bid and be done with it. Not sure how Delta awards their ground handling contracts. I was talking to a guy in CAE the other day that USED to work for XJT. He'd been there for 10 years and was getting ready to retire, but the ground contract came up for bid with CAL, XJT lost the bid, and now he's a first year guy at American Eagle b/c they closed up shop at XJT there.
The problem with having multiple companies doing your outstation ground handling is there's a SIGNIFICANT disparity in customer service, both above and below the wing. We've all got our stations we hate to fly into b/c the ground service is so horrible, but the company running it underbid a better, more organized company. The big question is how Delta's gonna structure this. There are some rampers that have been with their respective companies several YEARS. Rampers have longevity raises just like pilots do, so an older, more experienced work force carries a higher price tag.
So, are they gonna do what amounts to a non-union DOH integration? Are they just gonna let people stay where they are and change the name on the pay stub? Are they gonna move and swap bases to maximize profits? Who knows. All I'm saying is this probably isn't gonna be as easy as it sounds.