Summary: Buffalo Niagara International Airport (BUF) has the highest cancellation rate in the country for 2022: 5.55% - up from 1.43% in 2021. That's an increase of 286.77%. LaGuardia Airport (LGA) in New York City saw the largest increase in canceled flights – from 1471 in 2021 to 8795 in 2022 - a 497.89% jump.