Delta Air Lines Inc. is showing no hard feelings after its recent trade spat with Boeing Co.

The No. 2 U.S. carrier wants to be one of the first to fly a potential new mid-sized jetliner from Boeing, said Delta Chief Executive Officer Ed Bastian. That's a vote of confidence from one of the most influential aircraft buyers as Boeing decides whether to build the plane, dubbed the 797 by analysts.

"You're going to see us participate in Boeing's middle-of-the-market campaign," Bastian said. "I hope that we're going to be a launch customer on that program as well."