Washington Dulles International in November 2025

83.6%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 2025, reporting carriers scheduled 4,589 domestic departures from Washington Dulles International (IAD). 83.6% left less than 15 minutes late and 80.5% reached their destination on time; 1.5% were cancelled.

Nationally that month, 78.1% of flights departed on time and 77.3% arrived on time, so IAD departures were 5.5 points above the national departure figure.

A year earlier, in November 2024, the airport had 4,666 departures with 88.4% leaving on time: a change of −4.8 points, with flights down 2%.

Flights arriving at IAD that month were on time 82.4% of the time (4,557 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 34%, national aviation system 31% and air carrier 30%.

On time 80.5%
Arrived 15+ minutes late 17.9%
Cancelled 1.5%
Diverted 0.2%

Every scheduled departure from IAD in November 2025, judged by arrival at the destination.

November 2025 against a year earlier, the airport's year and the nation

Measure	Nov 2025	Nov 2024	IAD, 12 months to Jul 2026	All reported flights, Nov 2025
Departed on time	83.6%	88.4%	82.6%	78.1%
Arrived on time	80.5%	86.9%	80.1%	77.3%
Cancelled	1.5%	0.3%	1.4%	2.5%
Average departure delay (late minutes only)	13.2 min	9.3 min	14.7 min	15.6 min
Scheduled departures a day	153	156	159	19,018
Scheduled departures	4,589	4,666	58,031	570,550

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
UA United Airlines	2,934	64%	82.9%	0.9 min	0.5%
YX Republic Airline	700	15%	77.4%	3.4 min	5.1%
DL Delta Air Lines	243	5%	78.2%	6.9 min	3.3%
OO SkyWest Airlines	171	4%	79.5%	17.3 min	0.0%
AA American Airlines	140	3%	80.0%	9.2 min	1.4%
F9 Frontier Airlines	123	3%	57.7%	35.3 min	1.6%
WN Southwest Airlines	100	2%	78.0%	4.5 min	2.0%
AS Alaska Airlines	86	2%	65.1%	10.8 min	3.5%
G4 Allegiant Air	50	1%	80.0%	2.8 min	0.0%
OH PSA Airlines	42	1%	85.7%	-5.7 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
IAD–ATL	Washington to Atlanta	322	76.7%	9.2 min	2.8%
IAD–DEN	Washington to Denver	276	90.9%	-5.0 min	0.4%
IAD–SFO	Washington to San Francisco	230	81.7%	0.4 min	0.9%
IAD–LAX	Washington to Los Angeles	198	86.4%	-6.4 min	0.5%
IAD–MCO	Washington to Orlando	171	76.6%	3.5 min	1.2%
IAD–CLT	Washington to Charlotte	161	80.7%	5.6 min	2.5%
IAD–ORD	Washington to Chicago	151	76.2%	11.0 min	2.0%
IAD–IAH	Washington to Houston	148	86.5%	-3.5 min	0.0%
IAD–DFW	Washington to Dallas/Fort Worth	143	76.2%	8.1 min	0.7%
IAD–BOS	Washington to Boston	119	76.5%	3.5 min	1.7%
IAD–SEA	Washington to Seattle	119	67.2%	18.4 min	2.5%
IAD–RDU	Washington to Raleigh/Durham	118	82.2%	-0.5 min	0.8%

By scheduled departure hour

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

Share of departures that left less than 15 minutes late, by scheduled hour (local time), November 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Nov 2025	Minutes
Air carrier	30.2%	30.2%	17,651
Late-arriving aircraft	34.2%	38.3%	20,039
National Aviation System	31.0%	26.7%	18,147
Extreme weather	4.5%	4.6%	2,605
Security	0.1%	0.1%	78

58,520 delay minutes on 821 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 2025?

83.6% of 4,589 scheduled domestic departures left less than 15 minutes late, and 80.5% reached their destination on time. The national figures that month were 78.1% and 77.3%.

How does that compare with a year earlier?

In November 2024, 88.4% of 4,666 departures left on time and 0.3% were cancelled, against 83.6% and 1.5% in November 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for November 2025; 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.