How delayed is Washington, DC (IAD)?

Washington, DC has an on-time rate of 81.2%. The average delay is 14.4 min.

What causes delays at IAD?

The main delay causes at IAD are carrier issues (37.0%), weather (9.5%), NAS/air traffic control (22.1%), and late arriving aircraft (31.2%).

What is the best time to fly from IAD?

The best time to fly from IAD is at 5:00 with a 89.7% on-time rate. Nov is the best month with 87.5% on-time flights.

Washington, DC

Washington, DC, DC — IAD

On-Time Rate

81.2%

2019-2025

Avg Delay

14.4 min

when delayed

Cancel Rate

2.0%

flights cancelled

Total Flights

369,064

2019-2025

Best Month

Nov

87.5% on-time

Worst Month

Jul

73.7% on-time

Best Departure Time

5:00

89.7% on-time

12-Month On-Time Trend

Delay Causes

Best Time to Fly (By Hour)

Seasonal Pattern

Airlines at IAD

Airline	Flights	On-Time	Avg Delay
United Airlines	186,521	81.1%	N/A
Mesa Airlines	51,079	80.5%	N/A
Republic Airways	41,099	82.7%	N/A
SkyWest Airlines	22,996	81.4%	N/A
Delta Air Lines	18,649	85.8%	N/A
Southwest Airlines	11,005	82.5%	N/A
Alaska Airlines	10,287	76.8%	N/A
PSA Airlines	9,474	82.4%	N/A
American Airlines	8,079	78.6%	N/A
Endeavor Air	4,442	84.8%	N/A

Most Delayed Routes

Destination	On-Time
IAD → EWRNewark, NJ	72.0%
IAD → LGANew York, NY	72.9%
IAD → AVLAsheville, NC	73.1%
IAD → OKCOklahoma City, OK	73.3%
IAD → ANCAnchorage, AK	73.5%

Most Punctual Routes

Destination	On-Time
IAD → PSPPalm Springs, CA	91.0%
IAD → BZNBozeman, MT	88.5%
IAD → SLCSalt Lake City, UT	87.8%
IAD → STTCharlotte Amalie, VI	86.6%
IAD → ABQAlbuquerque, NM	86.2%

Was your flight from Washington, DC delayed?

You may be entitled to compensation of up to $700 per passenger for delayed or cancelled flights. Check your eligibility now.

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Data source: Bureau of Transportation Statistics (BTS) On-Time Performance dataset. Statistics are based on reported flight data from 2019 through November 2025 and are not real-time. See our data methodology for details.