Monroe Energy, a subsidiary of Delta Air Lines, has signed a five-year agreement with Bridger, a midstream energy company, for the supply of 65,000 barrels of domestic crude oil daily to refinery in Trainer, Pennsylvania, US.

Under the agreement, a significant step in Delta’s strategy to manage the cost of jet fuel, Bridger will supply about one-third of the crude oil refined daily at the facility.

The Bakken oil fields’ lower-cost domestic crude will replace more expensive crude that historically has been shipped to the refinery from overseas.

Delta Fuel Optimization senior vice president Graeme Burnett said: "This strategic agreement with Bridger is a key milestone in our strategy to manage the cost of jet fuel.

"By combining this transaction with our other sources of domestic crude supply, we expect to meet our goal of a minimum of 70,000 barrels per day of domestic crude sourcing at the refinery.

"Supplying a third of the crude refined at Trainer from the Bakken further reduces the overall cost of fuel for Delta, adding to the significant benefits we already see from Monroe Energy, in combination with our robust fuel hedging program, fleet efficiency improvements and fuel conservation efforts."