Delta Air Lines, Inc. announced unaudited consolidated earnings and operating results for the fourth quarter and year ended December 31, 2015. For the quarter, the company reported total operating revenue of $9,502 million compared to $9,647 million a year ago. Operating income was $1,717 million compared to loss of $828 million a year ago. Income before income taxes was $1,533 million compared to loss of $1,140 million a year ago. Net income was $980 million or $1.25 per diluted share compared to loss of $712 million or $0.86 per diluted share a year ago. Net cash provided by operating activities was $1,479 million compared to $582 million a year ago. Non-GAAP pre-tax income was $1,447 million compared to $1,017 million a year ago. Non-GAAP net income was $926 million or $1.18 per diluted share compared to $649 million or $0.78 per diluted share a year ago. Net cash provided by operating activities, adjusted was $1.4 billion. The company able to drive a significant improvement in margins because the company remained disciplined and strategic about growth, which allowed to capture more than 75% of the savings from lower fuel prices. For the quarter, the company saw a 5-point improvement in domestic margins while international margins improved by 4 points.

For the year, the company reported total operating revenue of $40,704 million compared to $40,362 million a year ago. Operating income was $7,802 million compared to $2,206 million a year ago. Income before income taxes was $7,157 million compared to $1,072 million a year ago. Net income was $4,526 million or $5.63 per diluted share compared to $659 million or $0.78 per diluted share a year ago. Net cash provided by operating activities was $1,479 million compared to $582 million a year ago. Non-GAAP pre-tax income was $5,865 million compared to $4,536 million a year ago. Non-GAAP net income was $3,709 million. Adjusted net debt was $6.7 billion compared to $7.3 billion a year ago.

For the quarter on consolidated basis the company announced total revenue passenger miles of 49,573 million against 48,028 million a year ago. Available seat miles were 58,199 million against 58,029 million a year ago. Passenger load factor was 85.2% against 82.8% a year ago. Passenger revenue per available seat mile was 13.96 cents against 14.19 cents a year ago.

For the year, the company reported total revenue passenger miles of 209,625 million against 202,925 million a year ago. Available seat miles were 246,764 million against 239,676 million a year ago. Passenger load factor was 84.9% against 84.7% a year ago. Passenger revenue per available seat mile was 14.10 cents against 14.58 cents a year ago.

Currently the company expects capacity growth of 2% to 3% for the first quarter of 2016. The company expects a record first quarter with an operating margin of 18% to 20%, a roughly 10-point improvement from the prior first quarter. The company planning for roughly 4% to 5% growth in the domestic region in the first quarter. The company expects overall system unit revenues to decline 2.5% to 4.5% for the March quarter, which includes a 1.5-point headwind from currency.

Currently the company expects capacity growth of 0 to 2% for the full year of 2016. The company planning for roughly 1% to 3% growth for the full year.