Washington Dulles International in November 2024

88.4%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In November 2024, reporting carriers scheduled 4,666 domestic departures from Washington Dulles International (IAD). 88.4% left less than 15 minutes late and 86.9% reached their destination on time; 0.3% were cancelled.

Nationally that month, 85.2% of flights departed on time and 84.8% arrived on time, so IAD departures were 3.2 points above the national departure figure.

A year earlier, in November 2023, the airport had 3,720 departures with 89.5% leaving on time: a change of −1.1 points, with flights up 25%.

Flights arriving at IAD that month were on time 88.9% of the time (4,668 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 42%, late-arriving aircraft 32% and national aviation system 21%.

On time 86.9%
Arrived 15+ minutes late 12.5%
Cancelled 0.3%
Diverted 0.2%

Every scheduled departure from IAD in November 2024, judged by arrival at the destination.

November 2024 against a year earlier, the airport's year and the nation

Measure	Nov 2024	Nov 2023	IAD, 12 months to Jul 2026	All reported flights, Nov 2024
Departed on time	88.4%	89.5%	82.6%	85.2%
Arrived on time	86.9%	89.4%	80.1%	84.8%
Cancelled	0.3%	0.1%	1.4%	0.5%
Average departure delay (late minutes only)	9.3 min	7.8 min	14.7 min	10.2 min
Scheduled departures a day	156	124	159	19,180
Scheduled departures	4,666	3,720	58,031	575,404

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
UA United Airlines	2,842	61%	87.2%	-4.0 min	0.5%
YX Republic Airline	779	17%	87.5%	-3.4 min	0.0%
OO SkyWest Airlines	259	6%	79.2%	14.2 min	0.4%
DL Delta Air Lines	253	5%	92.1%	-8.6 min	0.0%
AS Alaska Airlines	151	3%	83.4%	-1.1 min	0.0%
OH PSA Airlines	145	3%	91.7%	-5.4 min	0.0%
WN Southwest Airlines	102	2%	86.3%	0.5 min	0.0%
AA American Airlines	61	1%	85.2%	31.3 min	3.3%
F9 Frontier Airlines	30	1%	76.7%	2.8 min	0.0%
G4 Allegiant Air	24	1%	75.0%	6.1 min	0.0%
9E Endeavor Air	20	0%	85.0%	-13.3 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
IAD–ATL	Washington to Atlanta	290	92.4%	-8.1 min	0.3%
IAD–DEN	Washington to Denver	279	90.3%	-8.7 min	0.7%
IAD–SFO	Washington to San Francisco	257	77.4%	0.7 min	0.8%
IAD–CLT	Washington to Charlotte	237	86.1%	-2.6 min	0.0%
IAD–LAX	Washington to Los Angeles	229	88.2%	-2.5 min	0.9%
IAD–SEA	Washington to Seattle	181	95.0%	-12.8 min	0.0%
IAD–MCO	Washington to Orlando	163	85.9%	0.4 min	0.0%
IAD–ORD	Washington to Chicago	149	86.6%	-4.2 min	0.7%
IAD–IAH	Washington to Houston	148	91.9%	-7.6 min	0.0%
IAD–DFW	Washington to Dallas/Fort Worth	145	89.7%	7.0 min	1.4%
IAD–BOS	Washington to Boston	119	81.5%	8.2 min	0.0%
IAD–LGA	Washington to New York	119	71.4%	1.9 min	0.0%

By scheduled departure hour

100

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), November 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Nov 2024	Minutes
Air carrier	42.0%	36.9%	16,675
Late-arriving aircraft	32.3%	35.6%	12,840
National Aviation System	21.0%	21.9%	8,331
Extreme weather	4.8%	5.4%	1,894
Security	0.0%	0.2%	7

39,747 delay minutes on 585 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left IAD on time in November 2024?

88.4% of 4,666 scheduled domestic departures left less than 15 minutes late, and 86.9% reached their destination on time. The national figures that month were 85.2% and 84.8%.

How does that compare with a year earlier?

In November 2023, 89.5% of 3,720 departures left on time and 0.1% were cancelled, against 88.4% and 0.3% in November 2024.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for November 2024; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for IAD · methodology · corrections.