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Low-cost airlines like Spirit and Frontier offer the least amount of legroom at 28 inches.
Delta Air Lines and United Airlines have pitch spaces -- the distance between seats -- averaging between 30 and 31 inches, while JetBlue Airways and Southwest Airlines have between 31 and 33 inches, according to CNN.
A source also told CNN that bathrooms on American Airlines' new 737 Max jets will be smaller.
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An American Airlines spokesman said the airline will order 100 737 Max jets and plans to begin flying the first planes domestically later this year. Rollout of the planes will continue into the next few years.
Read more at CNN.
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