7Baggers

Frontier Group Holdings, Inc
(NASDAQ:ULCC) 

ULCC stock logo

Frontier Group Holdings, Inc., a low-fare airline company, provides air transportation for passengers. The company operates an airline that serves approximately 110 airports throughout the United States and international destinations in the Americas. As of December 31, 2020, it had a fleet of 104 Ai...

Founded: 2013
CEO: Barry L Biffle  
Sector: Industrials
Industry: Airlines

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At a glance:
Bull Thesis:
Bear Thesis:
Main Competitors:
Moat:
Income Statements:
Quarterly
Annual
    Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 
                        
      operating revenues:
                        
      passenger
    952,000,000 962,000,000 854,000,000 898,000,000 884,000,000 978,000,000 910,000,000 950,000,000 845,000,000  945,000,000 830,000,000 887,000,000 883,000,000 890,000,000 588,000,000 592,000,000 610,000,000 536,000,000 262,000,000 
      other
    40,000,000 35,000,000 32,000,000 31,000,000 28,000,000 24,000,000 25,000,000 23,000,000 20,000,000  22,000,000 18,000,000 19,000,000 23,000,000 19,000,000 17,000,000 17,000,000 20,000,000 14,000,000 9,000,000 
      total operating revenues
    992,000,000 997,000,000 886,000,000 929,000,000 912,000,000 1,002,000,000 935,000,000 973,000,000 865,000,000  967,000,000 848,000,000 906,000,000 906,000,000 909,000,000 605,000,000 609,000,000 630,000,000 550,000,000 271,000,000 
      operating expenses:
                        
      aircraft fuel
    268,000,000 227,000,000 234,000,000 230,000,000 238,000,000 229,000,000 261,000,000 288,000,000 263,000,000  244,000,000 292,000,000 304,000,000 306,000,000 335,000,000 215,000,000 186,000,000 166,000,000 139,000,000 84,000,000 
      salaries, wages and benefits
    271,000,000 262,000,000 251,000,000 254,000,000 249,000,000 241,000,000 236,000,000 244,000,000 233,000,000  211,000,000 203,000,000 187,000,000 182,000,000 174,000,000 172,000,000 162,000,000 161,000,000 154,000,000 139,000,000 
      aircraft rent
    265,000,000 212,000,000 181,000,000 194,000,000 161,000,000 192,000,000 177,000,000 147,000,000 159,000,000  148,000,000 131,000,000 155,000,000 140,000,000 133,000,000 128,000,000 131,000,000 128,000,000 133,000,000 138,000,000 
      station operations
    192,000,000 186,000,000 173,000,000 178,000,000 180,000,000 173,000,000 164,000,000 163,000,000 137,000,000  124,000,000 124,000,000 96,000,000 101,000,000 120,000,000 105,000,000 99,000,000 108,000,000 107,000,000 70,000,000 
      maintenance, materials and repairs
    142,000,000 59,000,000 52,000,000 47,000,000 51,000,000 65,000,000 53,000,000 42,000,000 49,000,000  52,000,000 45,000,000 39,000,000 42,000,000       
      sales and marketing
    43,000,000 41,000,000 38,000,000 39,000,000 41,000,000 45,000,000 46,000,000 47,000,000 40,000,000  44,000,000 40,000,000 44,000,000 42,000,000 46,000,000 32,000,000 29,000,000 33,000,000 30,000,000 17,000,000 
      depreciation and amortization
    62,000,000 26,000,000 24,000,000 21,000,000 20,000,000 19,000,000 19,000,000 18,000,000 16,000,000  12,000,000 11,000,000 9,000,000 8,000,000 15,000,000 13,000,000 10,000,000 10,000,000 10,000,000 8,000,000 
      other operating
    32,000,000 -65,000,000 10,000,000 41,000,000 18,000,000 -7,000,000 -40,000,000 -1,000,000 -1,000,000  53,000,000 26,000,000 25,000,000 41,000,000 39,000,000 48,000,000 41,000,000 24,000,000 19,000,000 17,000,000 
      total operating expenses
    1,275,000,000 948,000,000 963,000,000 1,004,000,000 958,000,000 957,000,000 916,000,000 948,000,000 896,000,000  888,000,000 873,000,000 861,000,000 850,000,000 902,000,000 758,000,000 695,000,000 587,000,000 532,000,000 363,000,000 
      operating income
    -283,000,000 49,000,000 -77,000,000 -75,000,000 -46,000,000 45,000,000 19,000,000 25,000,000 -31,000,000  79,000,000 -25,000,000 45,000,000 56,000,000 7,000,000 -153,000,000 -86,000,000 43,000,000 18,000,000 -92,000,000 
      yoy
    515.22% 8.89% -505.26% -400.00% 48.39%  -75.95% -200.00% -168.89%  1028.57% -83.66% -152.33% 30.23% -61.11% 66.30%     
      qoq
    -677.55% -163.64% 2.67% 63.04% -202.22% 136.84% -24.00% -180.65%   -416.00% -155.56% -19.64% 700.00% -104.58% 77.91% -300.00% 138.89% -119.57%  
      other income:
                        
      interest expense
    -12,000,000 -12,000,000 -15,000,000 -10,000,000 -9,000,000 -9,000,000 -10,000,000 -8,000,000 -9,000,000  -7,000,000 -6,000,000 -5,000,000 -4,000,000 -3,000,000 -9,000,000 -2,000,000 -4,000,000 -5,000,000 -22,000,000 
      capitalized interest
    8,000,000 9,000,000 10,000,000 8,000,000 8,000,000 8,000,000 8,000,000 7,000,000 9,000,000  6,000,000 6,000,000 5,000,000 3,000,000 2,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 
      interest income and other
    6,000,000 6,000,000 6,000,000 7,000,000 7,000,000 7,000,000 10,000,000 8,000,000 7,000,000  10,000,000 8,000,000 5,000,000 3,000,000 2,000,000  1,000,000 1,000,000   
      total other income
    2,000,000 3,000,000 1,000,000 5,000,000 6,000,000 6,000,000 8,000,000 7,000,000 7,000,000  9,000,000 8,000,000 -1,250,000 2,000,000 1,000,000 -8,000,000  -2,000,000 -4,000,000 -21,000,000 
      income before income taxes
    -281,000,000 52,000,000 -76,000,000 -70,000,000 -40,000,000 51,000,000 27,000,000 32,000,000 -24,000,000  88,000,000 -17,000,000 50,000,000 58,000,000 8,000,000 -161,000,000 -86,000,000 41,000,000 14,000,000 -113,000,000 
      income tax expense
    -9,000,000 -1,000,000 1,000,000  3,000,000 -3,000,000 1,000,000 1,000,000 2,000,000  17,000,000 -4,000,000 10,000,000 27,000,000 -5,000,000 -40,000,000 -33,000,000 18,000,000 -5,000,000 -22,000,000 
      net income
    -272,000,000 53,000,000 -77,000,000 -70,000,000 -43,000,000 54,000,000 26,000,000 31,000,000 -26,000,000  71,000,000 -13,000,000 40,000,000 31,000,000 13,000,000 -121,000,000 -53,000,000 23,000,000 19,000,000 -91,000,000 
      yoy
    532.56% -1.85% -396.15% -325.81% 65.38%  -63.38% -338.46% -165.00%  446.15% -89.26% -175.47% 34.78% -31.58% 32.97%     
      qoq
    -613.21% -168.83% 10.00% 62.79% -179.63% 107.69% -16.13% -219.23%   -646.15% -132.50% 29.03% 138.46% -110.74% 128.30% -330.43% 21.05% -120.88%  
      earnings per share:
                        
      basic
    -1.18 0.24 -0.34 -0.31 -0.19 0.23 0.11 0.14 -0.12  0.32 -0.06 0.19 0.13 0.06 -0.56 -0.25 0.1 0.08 -0.46 
      diluted
    -1.18 0.24 -0.34 -0.31 -0.19 0.23 0.11 0.14 -0.12  0.31 -0.06 0.19 0.13 0.06 -0.56 -0.25 0.1 0.08 -0.46 
      transaction and merger-related costs
               1,000,000 2,000,000 -12,000,000 9,000,000 11,000,000     
      cares act credits
                     -72,000,000 -87,000,000 -136,000,000 
      maintenance materials and repairs
                  31,000,000 34,000,000 37,000,000 29,000,000 27,000,000 26,000,000 
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 
                          
        assets
                          
        cash and cash equivalents
      772,000,000 671,000,000 566,000,000 563,000,000 686,000,000 740,000,000 576,000,000 658,000,000 622,000,000 609,000,000 780,000,000 790,000,000 761,000,000 674,000,000 766,000,000 727,000,000 918,000,000 802,000,000 936,000,000 429,000,000 
        accounts receivable
      118,000,000 85,000,000 93,000,000 98,000,000 89,000,000 73,000,000 147,000,000 95,000,000 98,000,000 93,000,000 91,000,000 96,000,000 90,000,000 65,000,000 63,000,000 60,000,000 50,000,000 49,000,000 48,000,000 48,000,000 
        supplies
      106,000,000 90,000,000 90,000,000 86,000,000 81,000,000 79,000,000 76,000,000 78,000,000 75,000,000 79,000,000 60,000,000 57,000,000 55,000,000 54,000,000 54,000,000 41,000,000 29,000,000 29,000,000 20,000,000 20,000,000 
        other current assets
      102,000,000 112,000,000 98,000,000 85,000,000 97,000,000 98,000,000 111,000,000 116,000,000 108,000,000 90,000,000 78,000,000 99,000,000 114,000,000 99,000,000 71,000,000 48,000,000 40,000,000 212,000,000 222,000,000 223,000,000 
        total current assets
      1,098,000,000 958,000,000 847,000,000 832,000,000 953,000,000 990,000,000 910,000,000 947,000,000 903,000,000 871,000,000 1,009,000,000 1,042,000,000 1,020,000,000 892,000,000 954,000,000 876,000,000 1,037,000,000 1,092,000,000 1,226,000,000 720,000,000 
        property and equipment
      485,000,000 510,000,000 492,000,000 458,000,000 396,000,000 376,000,000 367,000,000 350,000,000 330,000,000 309,000,000 260,000,000 242,000,000 226,000,000 213,000,000 195,000,000 191,000,000 186,000,000 187,000,000 179,000,000 177,000,000 
        operating lease right-of-use assets
      4,599,000,000 4,806,000,000 4,321,000,000 4,270,000,000 4,242,000,000 3,930,000,000 3,723,000,000 3,589,000,000 3,117,000,000 2,964,000,000 2,638,000,000 2,623,000,000 2,484,000,000 2,405,000,000 2,396,000,000 2,403,000,000 2,426,000,000 2,491,000,000 2,390,000,000 2,292,000,000 
        pre-delivery deposits for flight equipment
      383,000,000 428,000,000 509,000,000 466,000,000 415,000,000 404,000,000 390,000,000 392,000,000 394,000,000 407,000,000 380,000,000 348,000,000 371,000,000 346,000,000 301,000,000 285,000,000 260,000,000 196,000,000 199,000,000 212,000,000 
        intangible assets
      27,000,000 27,000,000 27,000,000 27,000,000 27,000,000 27,000,000 27,000,000 27,000,000 27,000,000 28,000,000 28,000,000 28,000,000 28,000,000 28,000,000 28,000,000 28,000,000 29,000,000 29,000,000 29,000,000 29,000,000 
        other assets
      425,000,000 491,000,000 505,000,000 471,000,000 448,000,000 426,000,000 409,000,000 384,000,000 348,000,000 330,000,000 308,000,000 302,000,000 265,000,000 258,000,000 269,000,000 251,000,000 199,000,000 165,000,000 175,000,000 164,000,000 
        total assets
      7,017,000,000 7,220,000,000 6,701,000,000 6,524,000,000 6,481,000,000 6,153,000,000 5,826,000,000 5,689,000,000 5,206,000,000 4,993,000,000 4,708,000,000 4,670,000,000 4,499,000,000 4,246,000,000 4,245,000,000 4,136,000,000 4,235,000,000 4,252,000,000 4,288,000,000 3,680,000,000 
        liabilities and stockholders’ equity
                          
        accounts payable
      115,000,000 130,000,000 159,000,000 169,000,000 120,000,000 115,000,000 128,000,000 137,000,000 131,000,000 134,000,000 91,000,000 79,000,000 89,000,000 78,000,000 102,000,000 93,000,000 86,000,000 90,000,000 73,000,000 79,000,000 
        air traffic liability
      459,000,000 352,000,000 325,000,000 324,000,000 358,000,000 294,000,000 292,000,000 323,000,000 328,000,000 253,000,000 353,000,000 424,000,000 313,000,000 296,000,000 372,000,000 363,000,000 273,000,000 252,000,000 334,000,000 230,000,000 
        frequent flyer liability
      21,000,000 16,000,000 18,000,000 18,000,000 18,000,000 18,000,000 12,000,000 12,000,000 11,000,000 10,000,000 11,000,000 12,000,000 13,000,000 13,000,000 14,000,000 14,000,000 13,000,000 12,000,000 14,000,000 12,000,000 
        current maturities of long-term debt
      240,000,000 301,000,000 363,000,000 326,000,000 263,000,000 261,000,000 190,000,000 263,000,000 265,000,000 251,000,000 237,000,000 215,000,000 157,000,000 193,000,000 161,000,000 145,000,000 127,000,000 85,000,000 88,000,000 110,000,000 
        current maturities of operating leases
      793,000,000 779,000,000 718,000,000 700,000,000 686,000,000 664,000,000 632,000,000 601,000,000 576,000,000 549,000,000 497,000,000 487,000,000 465,000,000 451,000,000 440,000,000 446,000,000 444,000,000 450,000,000 444,000,000 423,000,000 
        other current liabilities
      610,000,000 525,000,000 527,000,000 508,000,000 497,000,000 500,000,000 470,000,000 485,000,000 486,000,000 461,000,000 456,000,000 463,000,000 518,000,000 421,000,000 461,000,000 387,000,000 383,000,000 349,000,000 438,000,000 369,000,000 
        total current liabilities
      2,238,000,000 2,103,000,000 2,110,000,000 2,045,000,000 1,942,000,000 1,852,000,000 1,724,000,000 1,821,000,000 1,797,000,000 1,658,000,000 1,645,000,000 1,680,000,000 1,555,000,000 1,452,000,000 1,550,000,000 1,448,000,000 1,326,000,000 1,238,000,000 1,391,000,000 1,223,000,000 
        long-term debt
      343,000,000 313,000,000 305,000,000 234,000,000 244,000,000 241,000,000 279,000,000 189,000,000 201,000,000 219,000,000 193,000,000 212,000,000 272,000,000 228,000,000 212,000,000 207,000,000 287,000,000 280,000,000 275,000,000 242,000,000 
        long-term operating leases
      3,872,000,000 4,070,000,000 3,646,000,000 3,610,000,000 3,598,000,000 3,302,000,000 3,126,000,000 3,016,000,000 2,565,000,000 2,440,000,000 2,157,000,000 2,152,000,000 2,034,000,000 1,973,000,000 1,964,000,000 1,964,000,000 1,991,000,000 2,053,000,000 1,966,000,000 1,881,000,000 
        long-term frequent flyer liability
      45,000,000 44,000,000 36,000,000 34,000,000 32,000,000 31,000,000 34,000,000 33,000,000 34,000,000 35,000,000 32,000,000 32,000,000 32,000,000 33,000,000 34,000,000 37,000,000 41,000,000 43,000,000 44,000,000 50,000,000 
        other long-term liabilities
      297,000,000 199,000,000 170,000,000 95,000,000 95,000,000 123,000,000 114,000,000 110,000,000 125,000,000 134,000,000 115,000,000 106,000,000 97,000,000 92,000,000 59,000,000 71,000,000 60,000,000 62,000,000 62,000,000 65,000,000 
        total liabilities
      6,795,000,000 6,729,000,000 6,267,000,000 6,018,000,000 5,911,000,000 5,549,000,000 5,277,000,000 5,169,000,000 4,722,000,000 4,486,000,000 4,142,000,000 4,182,000,000 3,990,000,000 3,778,000,000 3,819,000,000 3,727,000,000 3,705,000,000 3,676,000,000 3,738,000,000 3,461,000,000 
        commitments and contingencies
                          
        stockholders’ equity:
                          
        common stock, 0.001 par value per share...
                          
        additional paid-in capital
      440,000,000 437,000,000 434,000,000 429,000,000 423,000,000 414,000,000 414,000,000 411,000,000 406,000,000 403,000,000 396,000,000 392,000,000 393,000,000 389,000,000 385,000,000 381,000,000 381,000,000 374,000,000 371,000,000 60,000,000 
        retained earnings
      -213,000,000 59,000,000 6,000,000 83,000,000 153,000,000 196,000,000 142,000,000 116,000,000 85,000,000 111,000,000 180,000,000 109,000,000 122,000,000 82,000,000 51,000,000 38,000,000 159,000,000 212,000,000 189,000,000 170,000,000 
        accumulated other comprehensive income
      -5,000,000 -5,000,000 -6,000,000 -6,000,000 -6,000,000 -6,000,000 -7,000,000 -7,000,000 -7,000,000 -7,000,000 -10,000,000 -13,000,000 -6,000,000 -3,000,000 -10,000,000 -10,000,000 -10,000,000 -10,000,000 -10,000,000 -11,000,000 
        total stockholders’ equity
      222,000,000 491,000,000 434,000,000 506,000,000 570,000,000 604,000,000 549,000,000 520,000,000 484,000,000 507,000,000 566,000,000 488,000,000 509,000,000 468,000,000 426,000,000 409,000,000 530,000,000 576,000,000 550,000,000 219,000,000 
        total liabilities and stockholders’ equity
      7,017,000,000 7,220,000,000 6,701,000,000 6,524,000,000 6,481,000,000 6,153,000,000 5,826,000,000 5,689,000,000 5,206,000,000 4,993,000,000 4,708,000,000 4,670,000,000 4,499,000,000 4,246,000,000 4,245,000,000 4,136,000,000 4,235,000,000 4,252,000,000 4,288,000,000 3,680,000,000 
        aircraft maintenance deposits
              87,000,000 84,000,000 85,000,000 85,000,000 105,000,000 104,000,000 102,000,000 102,000,000 98,000,000 92,000,000 90,000,000 86,000,000 
        common stock, 0.001 par value...
                          
        common stock
                          
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2026-03-31 2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 
                           
          cash flows from operating activities:
                           
          net loss
        -272,000,000    -43,000,000            23,000,000   
          adjustments to reconcile net loss to cash from operating activities:
                           
          deferred income taxes
        -9,000,000 -1,000,000 1,000,000 3,000,000  1,000,000 2,000,000 17,000,000 -4,000,000 10,000,000 27,000,000 -5,000,000 -40,000,000 -23,000,000 18,000,000 -5,000,000 -22,000,000 
          depreciation and amortization
        25,000,000 26,000,000 24,000,000 21,000,000 20,000,000 19,000,000 19,000,000 18,000,000 16,000,000 12,000,000 11,000,000 9,000,000 8,000,000 15,000,000 13,000,000 10,000,000 10,000,000 10,000,000 8,000,000 
          gains recognized on sale-leaseback transactions
        -47,000,000 -145,000,000 -67,000,000 -34,000,000 -56,000,000 -76,000,000 -70,000,000 -77,000,000 -71,000,000 -17,000,000 -40,000,000 -38,000,000 -21,000,000 -21,000,000 -7,000,000 -5,000,000 -19,000,000 -21,000,000 -15,000,000 
          stock-based compensation
        5,000,000 5,000,000 5,000,000 6,000,000 5,000,000 4,000,000 3,000,000 5,000,000 4,000,000 3,000,000 4,000,000 4,000,000 4,000,000 4,000,000 3,000,000 3,000,000 3,000,000 2,000,000 3,000,000 
          early return agreement charges
        104,000,000                   
          changes in operating assets and liabilities:
                           
          accounts receivable
        -33,000,000 8,000,000 5,000,000 -9,000,000 -16,000,000 75,000,000 -52,000,000 3,000,000 -4,000,000 9,000,000 19,000,000 -22,000,000 3,000,000 -9,000,000 1,000,000 3,000,000 2,000,000 -20,000,000 
          supplies and other current assets
        -19,000,000 39,000,000 -36,000,000 2,000,000 6,000,000 16,000,000 3,000,000 -3,000,000 4,000,000   -5,000,000 -1,000,000 -21,000,000 -13,000,000 161,000,000 6,000,000 20,000,000 -13,000,000 
          other long-term assets
        -82,000,000 -78,000,000 -76,000,000 -54,000,000 -49,000,000 -48,000,000 -37,000,000 -57,000,000 -48,000,000 -56,000,000 -37,000,000 -26,000,000 -26,000,000 -25,000,000 -17,000,000 -13,000,000 -9,000,000 -7,000,000 -8,000,000 
          accounts payable
        5,000,000 -32,000,000 -20,000,000 47,000,000 4,000,000 -17,000,000 -7,000,000 4,000,000 5,000,000 14,000,000 -8,000,000 9,000,000 -21,000,000 3,000,000 5,000,000 -3,000,000 14,000,000 -4,000,000 6,000,000 
          air traffic liability
        107,000,000 27,000,000 1,000,000 -34,000,000 64,000,000 2,000,000 -31,000,000 -5,000,000 75,000,000 -71,000,000 111,000,000 17,000,000 -76,000,000 9,000,000 90,000,000 21,000,000 -82,000,000 104,000,000 95,000,000 
          other liabilities
        256,000,000 6,000,000 25,000,000 -8,000,000 -24,000,000 60,000,000 -11,000,000 3,000,000 25,000,000 4,000,000 -64,000,000 100,000,000 -26,000,000 50,000,000 6,000,000 27,000,000 -107,000,000 93,000,000 71,000,000 
          cash from operating activities
        40,000,000 -91,000,000 -215,000,000 -133,000,000 -86,000,000 87,000,000 -156,000,000 9,000,000 -22,000,000 -9,000,000 -25,000,000 94,000,000 -105,000,000 20,000,000 -87,000,000 120,000,000 -146,000,000 212,000,000 30,000,000 
          cash flows from investing activities:
                           
          capital expenditures
        -12,000,000 -22,000,000 -2,000,000 -33,000,000 -18,000,000 -14,000,000 -14,000,000 -31,000,000 -17,000,000 -12,000,000 -11,000,000 -10,000,000 -17,000,000 -7,000,000 -7,000,000 -7,000,000 -8,000,000 -9,000,000 -3,000,000 
          free cash flows
        28,000,000 -113,000,000 -217,000,000 -166,000,000 -104,000,000 73,000,000 -170,000,000 -22,000,000 -39,000,000 -21,000,000 -36,000,000 84,000,000 -122,000,000 13,000,000 -94,000,000 113,000,000 -154,000,000 203,000,000 27,000,000 
          pre-delivery deposits for flight equipment, net of refunds
        45,000,000 81,000,000 -43,000,000 -51,000,000 -11,000,000 -14,000,000 2,000,000 2,000,000 13,000,000 -32,000,000 23,000,000 -25,000,000 -45,000,000 -16,000,000 -25,000,000 -64,000,000 3,000,000 13,000,000 12,000,000 
          cash from investing activities
        33,000,000 59,000,000 -45,000,000 -84,000,000 -29,000,000 -29,000,000 -12,000,000 -27,000,000 -7,000,000 -43,000,000 10,000,000 -37,000,000 -60,000,000 -24,000,000 -33,000,000 -71,000,000 -6,000,000 3,000,000 7,000,000 
          cash flows from financing activities:
                           
          proceeds from issuance of debt, net of issuance costs
        51,000,000 138,000,000 253,000,000 68,000,000 33,000,000 58,000,000 276,000,000 73,000,000 69,000,000 16,000,000 36,000,000 59,000,000 73,000,000       
          principal repayments on debt
        -83,000,000 -192,000,000 -145,000,000 -15,000,000 -28,000,000 -27,000,000 -259,000,000 -87,000,000 -74,000,000 -13,000,000 -38,000,000 -51,000,000 -26,000,000 -24,000,000 -165,000,000 -37,000,000 -38,000,000 -22,000,000 
          proceeds from sale-leaseback transactions
        62,000,000 193,000,000 155,000,000 41,000,000 52,000,000 79,000,000 69,000,000 68,000,000 48,000,000 38,000,000 51,000,000 22,000,000 26,000,000   16,000,000 16,000,000 14,000,000 13,000,000 
          proceeds from the exercise of stock options
         6,000,000 1,000,000           
          tax withholdings on share-based awards
        -2,000,000 -2,000,000 -2,000,000 -4,000,000 -2,000,000           
          cash from financing activities
        28,000,000 137,000,000 263,000,000 94,000,000 61,000,000 106,000,000 86,000,000 54,000,000 42,000,000 42,000,000 44,000,000 30,000,000 73,000,000 43,000,000 -71,000,000 67,000,000 18,000,000 292,000,000 14,000,000 
          net increase in cash, cash equivalents and restricted cash
        101,000,000   -123,000,000 -54,000,000   36,000,000 13,000,000 -10,000,000 29,000,000 87,000,000 -92,000,000 39,000,000 -191,000,000 116,000,000 -134,000,000 507,000,000 51,000,000 
          cash, cash equivalents and restricted cash, beginning of period
        671,000,000 740,000,000 609,000,000 761,000,000 918,000,000 378,000,000 
          cash, cash equivalents and restricted cash, end of period
        772,000,000 105,000,000 3,000,000 -123,000,000 686,000,000 164,000,000 -82,000,000 36,000,000 622,000,000 -10,000,000 790,000,000 87,000,000 -92,000,000 39,000,000 727,000,000 116,000,000 -134,000,000 507,000,000 429,000,000 
          net income
         53,000,000 -77,000,000   54,000,000 26,000,000 31,000,000 -26,000,000 71,000,000 -13,000,000 40,000,000 31,000,000 13,000,000 -121,000,000    -91,000,000 
          adjustments to reconcile net income to cash from operating activities:
                           
          loss on extinguishment of debt
                  7,000,000     
          amortization of cash flow hedges, net of tax
                           
          aircraft maintenance deposits
             86,000,000 -4,000,000 -5,000,000 -4,000,000 -4,000,000 -4,000,000 -6,000,000 -4,000,000 -6,000,000 -6,000,000 -4,000,000 -4,000,000 
          other
             -1,000,000 2,000,000 -3,000,000 1,000,000 -2,000,000   -1,000,000 -1,000,000 -1,000,000 -1,000,000 -2,000,000 
          net decrease in cash, cash equivalents and restricted cash
                           
          warrant liability unrealized loss
                       2,000,000 20,000,000 
          proceeds from initial public offering, net of offering costs, underwriting discounts and commissions
                           
          minimum tax withholdings on share-based awards
                 -5,000,000 -1,000,000 -3,000,000  -3,000,000 
          cash flows from operating leases
                           
          amortization of swaption cash flow hedges, net of tax
                        
          proceeds from initial public offering, net of offering costs and underwriting discounts
                          
          proceeds from issuance of debt
                      97,000,000 48,000,000 39,000,000 50,000,000 26,000,000 
          cash flows for derivative instruments
                           
          dividends paid
                           
          losses from de-designated derivative positions
                           
          cash flows from derivative instruments