Southwest Airlines Co. reported consolidated unaudited earnings and operating results for the fourth quarter and full year ended December 31, 2013. For the quarter, the company reported total operating revenues of $4,428 million against $4,173 million a year ago. Operating income was $386 million against $91 million a year ago. Income before income taxes was $334 million against $125 million a year ago. Net income was $212 million or $0.30 per diluted share against $78 million or $0.11 per diluted share a year ago. Operating income, non-GAAP was $418 million against $136 million a year ago. Income before income taxes, non-GAAP was $372 million against $105 million a year ago. Net income, non-GAAP was $236 million or $0.33 per diluted share against $65 million or $0.09 per diluted share a year ago. Net cash provided by operating activities was $302 million against $232 million a year ago. Payments for purchase of property and equipment, net were $451 million against $399 million a year ago.

For the full year, the company reported total operating revenues of $17,699 million against $17,088 million a year ago. Operating income was $1,278 million against $623 million a year ago. Income before income taxes was $1,209 million against $685 million a year ago. Net income was $754 million or $1.06 per diluted share against $421 million or $0.56 per diluted share a year ago. Operating income, non-GAAP was $1,448 million against $838 million a year ago. Income before income taxes, non-GAAP was $1,290 million against $679 million a year ago. Net income, non-GAAP was $805 million or $1.12 per diluted share against $417 million or $0.56 per diluted share a year ago. Net cash provided by operating activities was $2,490 million against $2,064 million a year ago. Payments for purchase of property and equipment, net were $1,447 million against $1,348 million a year ago. Adjusted operating income, non-GAAP was $1,531 million against $919 million a year ago.

For the quarter, the company announced revenue passengers carried was 26,895,809 against 26,607,560 a year ago. Enplaned passengers were 33,118,822 against 32,699,829 a year ago. Revenue passenger miles (RPMs) were 25,652,363,000 against 24,821,008,000 a year ago. Available seat miles (ASMs) were 31,886,318,000 against 31,193,395,000 a year ago. Load factor was 80.4% against 79.6% a year ago. Average length of passenger haul was 954 miles against 933 miles a year ago. Average aircraft stage length was 704 miles against 688 miles a year ago. Passenger revenue yield per RPM was 16.36 cents against 15.87 cents a year ago. Operating revenue yield per ASM (RASM) was 13.89 cents against 13.38 cents a year ago. Passenger revenue yield per ASM (PRASM) was 13.16 cents against 12.63 cents a year ago. Operating expenses per ASM (CASM) was 12.68 cents against 13.08 cents a year ago. CASM, excluding fuel was 8.39 cents against 8.25 cents a year ago. CASM, excluding special items was 12.58 cents against 12.94 cents a year ago. CASM, excluding fuel and special items was 8.33 cents against 8.21 cents a year ago. CASM, excluding fuel, special items, and profit sharing was 8.12 cents against 8.15 cents a year ago.

For the year, the company announced revenue passengers carried was 108,075,976 against 109,346,509 a year ago. Enplaned passengers were 133,155,030 against 133,978,100 a year ago. Revenue passenger miles (RPMs) were 104,348,216,000 against 102,874,979,000 a year ago. Available seat miles (ASMs) were 130,344,072,000 against 128,137,110,000 a year ago. Load factor was 80.1% against 80.3% a year ago. Average length of passenger haul was 966 miles against 941 miles a year ago. Average aircraft stage length was 703 miles against 693 miles a year ago. Passenger revenue yield per RPM was 16.02 cents against 15.8647 cents a year ago. Operating revenue yield per ASM (RASM) was 13.58 cents against 13.34 cents a year ago. Passenger revenue yield per ASM (PRASM) was 12.83 cents against 12.56 cents a year ago. Operating expenses per ASM (CASM) was 12.60 cents against 12.85 cents a year ago. CASM, excluding fuel was 8.18 cents against 8.07 cents a year ago. CASM, excluding special items was 12.47 cents against 12.68 cents a year ago. CASM, excluding fuel and special items was 8.11 cents against 7.93 cents a year ago. CASM, excluding fuel, special items, and profit sharing was 7.94 cents against 7.84 cents a year ago.

The company currently estimates its 2014 capital expenditures to be in the $1.5 billion to $1.6 billion range. The company expects full year 2014 unit costs, excluding fuel, profit sharing, and special items, expected to increase year-over-year in the 2-3% range. The company projects effective tax rate 2014 to be net 38% range.

Based on current cost trends, the company expects first quarter 2014 unit costs, excluding fuel, profit sharing, and special items, to increase from first quarter 2013's 8.21 cents.