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Allegiant Air is an American low-cost airline, based in Enterprise, Nevada.

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JetBlue is an American low-cost airline headquartered in the Long Island City, New York.

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Avelo Airlines is an American ultra-low-cost carrier headquartered in Houston, Texas.

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Southwest Airlines is a major U.S. low cost airline headquartered in Dallas, Texas.

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Breeze Airways is an American low cost airline headquartered in Cottonwood Heights, Utah.

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Spirit Airlines is an American low-cost carrier headquartered in Miramar, Florida.

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Frontier Airlines is a United States low-cost carrier airline headquartered in Denver, Colorado.

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Sun Country Airlines, is a U.S. scheduled and charter airline headquartered in Minneapolis, Minnesota.