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Airlines and Airports
Airline On-Time Statistics and Delay Causes
Delay Cause Definition Understanding Delay Data Database Tables Flight Delays at a Glance

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On-Time Arrival Performance National (March, 2023)
	Most Recent Month Year to Date	View Pie Chart Print Table Download Raw Data

	Number of Operations	% of Total Operations	Delayed Minutes	% of Total Delayed Minutes
On Time	464,349	75.35%	N/A	N/A
Air Carrier Delay	45,588	7.40%	3,200,103	34.65%
Weather Delay	4,037	0.66%	446,092	4.83%
National Aviation System Delay	41,579	6.75%	1,907,506	20.65%
Security Delay	419	0.07%	18,745	0.20%
Aircraft Arriving Late	50,943	8.27%	3,662,761	39.66%
Cancelled	7,847	1.27%	N/A	N/A
Diverted	1,472	0.24%	N/A	N/A
Total Operations	616,234	100.00%	9,235,207	100.00%

A flight is considered delayed when it arrived 15 or more minutes than the schedule (see definitions in Frequently Asked Questions). Delayed minutes are calculated for delayed flights only.
When multiple causes are assigned to one delayed flight, each cause is prorated based on delayed minutes it is responsible for. The displayed numbers are rounded and may not add up to the total.

SOURCE: Bureau of Transportation Statistics, Airline Service Quality Performance 234

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