But revenue is rising too. Bastian said February passenger revenue per available seat mile (PRASM) will rise 5 percent. For the first quarter, PRASM is expected to gain 4.5 percent to 5.5 percent.
A New York buildup is fueling the revenue gains. Bastian said. Delta has gained over seven points of corporate market share in New York over the past three years, leading to a margin gain of more than 300 basis points in New York, he said, noting, "We're still in the building phase."
The carrier has boosted its capacity at LaGuardia Airport by 45 percent in the past year, a result of an asset trade with US Airways, and it will open a new Kennedy terminal on May 24. Later this year, it will begin a new trans-Atlantic joint venture with Virgin Atlantic after buying 49 percent of the carrier. That will enable growth in the Kennedy-London Heathrow market, which Bastian said has historically been "our single biggest challenge in corporate customer negotiations" in New York.
According to a chart Delta compiled, Kennedy/Heathrow is the No. 1 U.S. international route, accounting for 2.7 million passengers a year. It dwarfs every other route. No. 2 is Los Angeles/London, accounting for 1.4 million passengers. The next three routes, with 1.2 million passengers annually, are Chicago/London, New York/Paris and Newark/London. Interestingly, US Airways does not fly a single one of the top 10 U.S. international routes, largely explaining why it could use a merger with American.
Bastian said the route "is the driving force behind our investment decision at Virgin Atlantic." American currently has 23 percent of the traffic on the route, while its partner British Airways has 39 percent. Delta has 14 percent, but its new partner Virgin Atlantic as 22 percent. "Four years ago Delta was legally restricted from serving Heathrow," Bastian reminded the conference.
Delta also sees gains coming from its investment in the Trainer oil refinery, which should produce $75 million in profit in the second quarter. Bastian called the refinery investment a "game changing innovation," but noted that "running an oil refinery, much like running an airline, is not for the faint of heart."
Additionally, Delta expects both fuel efficiency and customer satisfaction gains from its ongoing move to reduce the number of 50-seat jets in its fleet. By 2015, Delta will have the same capacity with 200 fewer aircraft. "Any way you look at it, this is a home run," Bastian said.
Asked about the impact of the US Airways/American merger, Bastian said: "We believe that mergers in this industry generally are a good thing if done well. For us, it's going to be a positive. It's just another form of continuing to maintain discipline in a business that will continue to be as competitive as ever." He hinted at a possible benefit, saying that some airline mergers have gone well, and some have not gone so well and said he does not know what impact the merger will have on American and US Airways passengers.
One other plus for Delta shareholders: Bastian said the carrier is reviewing a "return of capital to shareholders," and expects to make an announcement in the coming months. Delta suspended its dividend in 2003.
In 2012, Delta earned $1.6 billion in pretax income, followed by Southwest Airlines with $679 million, United Continental with $599 million, US Airways with $537 million and JetBlue Airways with $209 million.
In late morning trading Friday, Delta shares were up 65 cents, or nearly 5%, to $15.47.