| Load factor, 2023 | 81.3% | 8th of 8 · top 85.0% | Why budget airlines stopped winning |
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| Average share of revenue spent on fuel and on labor, 2010 to 2023 · Fuel | 31% | 1st of 8 · top 31% | Why budget airlines stopped winning |
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| Average share of revenue spent on fuel and on labor, 2010 to 2023 · Labor | 29% | 4th of 8 · top 40% | Why budget airlines stopped winning |
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| Annual operating margin · 2015 | 24% | 1st of 9 · top 24% | Why budget airlines stopped winning |
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| Annual operating margin · 2016 | 19% | 2nd of 9 · top 24% | Why budget airlines stopped winning |
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| Annual operating margin · 2014 | 18% | 3rd of 9 · top 24% | Why budget airlines stopped winning |
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| Annual operating margin · 2013 | 17% | 4th of 9 · top 24% | Why budget airlines stopped winning |
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| Average operating margin, 2009 to 2019 | 16% | 1st of 7 · top 16% | Why budget airlines stopped winning |
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| Annual operating margin · 2017 | 15% | 5th of 9 · top 24% | Why budget airlines stopped winning |
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| Annual operating margin · 2011 | 14% | 6th of 9 · top 24% | Why budget airlines stopped winning |
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| Annual operating margin · 2019 | 14% | 6th of 9 · top 24% | Why budget airlines stopped winning |
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| Annual operating margin · 2012 | 13% | 8th of 9 · top 24% | Why budget airlines stopped winning |
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| Annual operating margin · 2018 | 8% | 9th of 9 · top 24% | Why budget airlines stopped winning |
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| Domestic market share of the two ultra-low-cost carriers · 2020 | 6% | 1st of 14 · top 6% | Why budget airlines stopped winning |
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| US-based airlines by share of the domestic market, 2023 | 5% | 6th of 8 · top 18% | Why budget airlines stopped winning |
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| Domestic market share of the two ultra-low-cost carriers · 2021 | 5% | 2nd of 14 · top 6% | Why budget airlines stopped winning |
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| Domestic market share of the two ultra-low-cost carriers · 2022 | 5% | 2nd of 14 · top 6% | Why budget airlines stopped winning |
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| Domestic market share of the two ultra-low-cost carriers · 2023 | 5% | 2nd of 14 · top 6% | Why budget airlines stopped winning |
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| Domestic market share of the two ultra-low-cost carriers · 2018 | 4% | 5th of 14 · top 6% | Why budget airlines stopped winning |
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| Domestic market share of the two ultra-low-cost carriers · 2019 | 4% | 5th of 14 · top 6% | Why budget airlines stopped winning |
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| Domestic market share of the two ultra-low-cost carriers · 2015 | 3% | 7th of 14 · top 6% | Why budget airlines stopped winning |
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| Domestic market share of the two ultra-low-cost carriers · 2016 | 3% | 7th of 14 · top 6% | Why budget airlines stopped winning |
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| Domestic market share of the two ultra-low-cost carriers · 2017 | 3% | 7th of 14 · top 6% | Why budget airlines stopped winning |
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| Domestic market share of the two ultra-low-cost carriers · 2013 | 2% | 10th of 14 · top 6% | Why budget airlines stopped winning |
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| Domestic market share of the two ultra-low-cost carriers · 2014 | 2% | 10th of 14 · top 6% | Why budget airlines stopped winning |
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| Domestic market share of the two ultra-low-cost carriers · 2010 | 1% | 12th of 14 · top 6% | Why budget airlines stopped winning |
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| Domestic market share of the two ultra-low-cost carriers · 2011 | 1% | 12th of 14 · top 6% | Why budget airlines stopped winning |
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| Domestic market share of the two ultra-low-cost carriers · 2012 | 1% | 12th of 14 · top 6% | Why budget airlines stopped winning |
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| Annual operating margin by carrier | −7% | 7th of 7 · top 10% | Why budget airlines stopped winning |
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| Annual operating margin post-COVID · 2023 | −9% | 1st of 4 · worst −27% | Why budget airlines stopped winning |
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| Annual operating margin post-COVID · 2021 | −12% | 2nd of 4 · worst −27% | Why budget airlines stopped winning |
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| Annual operating margin post-COVID · 2022 | −12% | 2nd of 4 · worst −27% | Why budget airlines stopped winning |
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| Annual operating margin post-COVID · 2020 | −27% | 4th of 4 · worst −27% | Why budget airlines stopped winning |
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