On-Time Details

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	Bureau of Transportation Statistics
	The Intermodal Transportation Database	Friday, November 12, 2004

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On-Time Performance - Flight Delays at a Glance
Year: 1999	Filter Airport	Filter Carrier	Filter Year	Filter Operation
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Month	Ontime Arrivals	Ontime (%)	Arrival Delays	Delayed (%)	Flights Cancelled	Cancelled (%)	Diverted	Flight Operations
January	307,070	67.66%	118,153	26.04%	26,543	5.85%	2,048	453,814
February	329,531	78.91%	72,793	17.43%	14,523	3.48%	780	417,627
March	364,108	78.09%	88,715	19.03%	12,419	2.66%	1,025	466,267
April	341,252	75.73%	99,351	22.05%	8,923	1.98%	1,094	450,620
May	352,017	76.19%	97,022	21.00%	11,857	2.57%	1,158	462,054
June	326,363	70.88%	119,811	26.02%	12,676	2.75%	1,617	460,467
July	336,896	71.07%	120,603	25.44%	14,873	3.14%	1,675	474,047
August	365,001	76.11%	101,734	21.21%	11,711	2.44%	1,103	479,549
September	365,196	79.35%	79,014	17.17%	15,243	3.31%	798	460,251
October	382,921	80.06%	85,013	17.77%	9,751	2.04%	609	478,294
November	370,397	81.41%	76,175	16.74%	7,631	1.68%	747	454,950
December	366,541	78.00%	94,341	20.07%	8,161	1.74%	901	469,944
--------	--------	--------	--------	--------	--------	--------	--------	--------
1999 (Annual)	4,207,293	76.11%	1,152,725	20.85%	154,311	2.79%	13,555	5,527,884

* For purposes of this report, a flight is considered delayed if it arrived at (or departed) the gate 15 minutes or more after the scheduled arrival (departure) time as reflected in the Computerized Reservation System.
** The information is based on data submitted by reporting carriers. The number of reporting carriers varies as follows: 10 from 1997 to 1999, 11 in 2000, 12 in 2001, 10 in 2002, 18 in 2003, and 19 in 2004. Major Carriers 1997-Present refers to the 9 major carriers that reported for all those years. They are Alaska Airlines, America West Airlines, American Airlines, Continental Airlines, Delta Air Lines, Northwest Airlines, Southwest Airlines, United Airlines, and US Airways. American Eagle Airlines and ATA Airlines are not included because they did not report for the full period.