Delta regional jet CC Eric Salard

Airline complaints dropped by a dramatic 20.9 percent in April compared with the same month one year ago, and on-time arrivals improved, according to a new report by the U.S. Department of Transportation.

The Air Travel Consumer Report says carriers achieved an on-time arrival rate of 84.5 percent in April 2016, up three percent since 2015.

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Hawaiian, Delta, and Alaska airlines were the best at staying on schedule, while Spirit Airlines scored lowest because more than a quarter of their planes arrived late.

Southwest Airlines logging the fewest complaints.

Air carriers are required to report these and other statistics to the Aviation Consumer Protection Division.

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In other bright spots, the number of passengers reporting mishandled or lost baggage fell slightly and complaints about the treatment of disabled passengers have decreased.

The Air Travel Consumer Report can be found on DOT’s website.

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