The domestic crude oil from the Bakken oil fields in North Dakota costs less than the crude oil shipped to the refinery from overseas, reducing the overall cost of fuel for Delta.
Delta had been working to address the problem of how to transport the Bakken oil to the refinery. Bridger recently invested in $200 million to buy 1,300 new rail cars to add to its fleet, which will be used to transport oil to the Trainer refinery.
While the refinery is aimed at allowing Delta to gain more control over its fuel costs, the airline has struggled to bring the facility to profitability over the last two years. Delta earlier this year said it lost $41 million from operations of the refinery in the first quarter but expected Trainer to be profitable in the second quarter.