Washington Dulles (IAD)

IAD / KIAD

Official · May 2026

2,510,389

Washington Dulles International Airport handled 2,510,389 passengers in May 2026, down 6.5% on a year earlier, according to US Bureau of Transportation Statistics — T-100 Air Carrier Statistics.

Full count · domestic + international Flight timing & delays ↓

Passengers over time

Showing 53 months. Full series runs 1990–2026 (437 periods).

Drag across the chart to zoom into a period.

January 2022 February 2023 March 2024 April 2025 May 2026

Domestic / International

May 2026

Domestic 65.2% 1,636,744
International 34.8% 873,645

Against 2019 +15.8% same month, before the pandemic

International share 35% of passengers in May 2026

Series depth 36 years from 1990

The most recent periods

Open any period for the full breakdown.

24 of 24

Period	Passengers	Year on year	Source
May 2026	2,510,389	−6.5%	US Bureau of Transportation Statistics	Open this month →
April 2026	2,264,824	−5.6%	US Bureau of Transportation Statistics	Open this month →
March 2026	2,185,458	−0.4%	US Bureau of Transportation Statistics	Open this month →
February 2026	1,699,350	+2.8%	US Bureau of Transportation Statistics	Open this month →
January 2026	1,851,322	−3.1%	US Bureau of Transportation Statistics	Open this month →
December 2025	2,300,895	−0.2%	US Bureau of Transportation Statistics	Open this month →
November 2025	2,086,197	−1.2%	US Bureau of Transportation Statistics	Open this month →
October 2025	2,310,752	−0.4%	US Bureau of Transportation Statistics	Open this month →
September 2025	2,242,298	+0.7%	US Bureau of Transportation Statistics	Open this month →
August 2025	2,645,001	+5.6%	US Bureau of Transportation Statistics	Open this month →
July 2025	2,738,251	+4.2%	US Bureau of Transportation Statistics	Open this month →
June 2025	2,765,956	+10.5%	US Bureau of Transportation Statistics	Open this month →
May 2025	2,685,661	+10.6%	US Bureau of Transportation Statistics	Open this month →
April 2025	2,398,485	+12.5%	US Bureau of Transportation Statistics	Open this month →
March 2025	2,194,740	+7.1%	US Bureau of Transportation Statistics	Open this month →
February 2025	1,652,721	+3.1%	US Bureau of Transportation Statistics	Open this month →
January 2025	1,911,077	+13.3%	US Bureau of Transportation Statistics	Open this month →
December 2024	2,306,476	+16.6%	US Bureau of Transportation Statistics	Open this month →
November 2024	2,112,359	+11.6%	US Bureau of Transportation Statistics	Open this month →
October 2024	2,318,978	+4.7%	US Bureau of Transportation Statistics	Open this month →
September 2024	2,226,649	+4.0%	US Bureau of Transportation Statistics	Open this month →
August 2024	2,504,953	+5.2%	US Bureau of Transportation Statistics
July 2024	2,626,699	+7.4%	US Bureau of Transportation Statistics
June 2024	2,502,605	+9.0%	US Bureau of Transportation Statistics

Also tracked here: aircraft movements (through May 2026), tonnes of cargo (through May 2026).

Flight timing & delays

Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.

US domestic sectors recorded by BTS

Source: BTS · US Department of Transportation · 2024-09-01 → 2026-06-30

Lowest average delay08:00–09:003.0min · 19,782 recorded · 19,622 measured

Gap to highest-delay hour48.8min08:00 ↔ 21:00

Recorded flights104,304Washington Dulles International Airport

Departure hour

On-time departures

Hover, tap or focus a point to see its value, sample and source.

Average departure delay

Hover, tap or focus a point to see its value, sample and source.

Recorded flights

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View the figures

Departure hour	On-time departures	Average departure delay	With departure time	Recorded flights
00:00	No observations	—	—	—
01:00	No observations	—	—	—
02:00	No observations	—	—	—
03:00	No observations	—	—	—
04:00	No observations	—	—	—
05:00	91.3%	6.6 min	496	502
06:00	92.2%	4.4 min	6,019	6,093
07:00	87.7%	9.5 min	3,063	3,103
08:00	91.8%	3.0 min	19,622	19,782
09:00	90.1%	3.8 min	4,637	4,690
10:00	87.4%	7.2 min	1,568	1,589
11:00	85.9%	12.3 min	921	930
12:00	87.5%	7.9 min	14,353	14,505
13:00	86.7%	7.7 min	4,116	4,155
14:00	80.7%	13.3 min	1,500	1,515
15:00	81.4%	15.1 min	3,548	3,563
16:00	77.7%	15.6 min	2,029	2,050
17:00	77.7%	18.0 min	22,471	22,747
18:00	72.1%	19.5 min	3,666	3,709
19:00	74.6%	16.5 min	2,501	2,535
20:00	70.7%	21.4 min	1,210	1,233
21:00	63.1%	51.8 min	206	209
22:00	81.5%	12.9 min	11,203	11,390
23:00	Fewer than 200 measured departures	—	3	4

Day of week

On-time departures

Hover, tap or focus a point to see its value, sample and source.

Average departure delay

Hover, tap or focus a point to see its value, sample and source.

Recorded flights

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View the figures

Day of week	On-time departures	Average departure delay	With departure time	Recorded flights
Monday	83.7%	11.3 min	15,385	15,630
Tuesday	87.2%	6.9 min	14,198	14,297
Wednesday	86.1%	9.6 min	14,214	14,321
Thursday	84.1%	11.4 min	15,260	15,397
Friday	83.3%	12.1 min	15,373	15,491
Saturday	83.8%	10.9 min	13,635	13,753
Sunday	81.8%	12.5 min	15,067	15,415

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

On-time departures

Hover, tap or focus a point to see its value, sample and source.

Average departure delay

Hover, tap or focus a point to see its value, sample and source.

Recorded flights

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View the figures

Month of year	On-time departures	Average departure delay	With departure time	Recorded flights
Jan	83.2%	11.9 min	7,890	8,256
Feb	85.9%	7.8 min	7,688	7,779
Mar	83.2%	12.0 min	9,488	9,598
Apr	88.7%	5.7 min	9,845	9,879
May	84.3%	11.2 min	10,901	10,965
Jun	78.6%	18.7 min	10,218	10,324
Jul	72.1%	28.6 min	5,097	5,248
Aug	83.6%	10.2 min	5,160	5,201
Sep	89.3%	4.7 min	9,093	9,128
Oct	89.6%	4.2 min	9,472	9,516
Nov	87.2%	7.1 min	9,172	9,255
Dec	80.1%	13.7 min	9,108	9,155

Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.

Recorded outcomes

On time 83.3% 86,909
Delayed >15 min 15.6% 16,223
Cancelled 1.1% 1,172
Missing departure time 0.0% 0

All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.

On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from punctuality and average delay.

Flights touching Brazil reported to ANAC · partial coverage

Source: ANAC Brazil VRA · 2024-09-01 → 2025-03-28

Recorded flights209Washington Dulles International Airport

Departure hour

Recorded flights

Hover, tap or focus a point to see its value, sample and source.

No bucket in this view has 200 measured departures yet. Flight counts are shown; on-time and delay charts become available when the sample is large enough.

View the figures

Departure hour	On-time departures	Average departure delay	With departure time	Recorded flights
00:00	No observations	—	—	—
01:00	No observations	—	—	—
02:00	No observations	—	—	—
03:00	No observations	—	—	—
04:00	No observations	—	—	—
05:00	No observations	—	—	—
06:00	No observations	—	—	—
07:00	No observations	—	—	—
08:00	No observations	—	—	—
09:00	No observations	—	—	—
10:00	No observations	—	—	—
11:00	No observations	—	—	—
12:00	No observations	—	—	—
13:00	No observations	—	—	—
14:00	No observations	—	—	—
15:00	No observations	—	—	—
16:00	No observations	—	—	—
17:00	No observations	—	—	—
18:00	No observations	—	—	—
19:00	No observations	—	—	—
20:00	No observations	—	—	—
21:00	No observations	—	—	—
22:00	Fewer than 200 measured departures	—	177	181
23:00	Fewer than 200 measured departures	—	28	28

Day of week

Recorded flights

Hover, tap or focus a point to see its value, sample and source.

No bucket in this view has 200 measured departures yet. Flight counts are shown; on-time and delay charts become available when the sample is large enough.

View the figures

Day of week	On-time departures	Average departure delay	With departure time	Recorded flights
Monday	Fewer than 200 measured departures	—	30	30
Tuesday	Fewer than 200 measured departures	—	29	30
Wednesday	Fewer than 200 measured departures	—	29	30
Thursday	Fewer than 200 measured departures	—	30	30
Friday	Fewer than 200 measured departures	—	30	30
Saturday	Fewer than 200 measured departures	—	28	29
Sunday	Fewer than 200 measured departures	—	29	30

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

Recorded flights

Hover, tap or focus a point to see its value, sample and source.

No bucket in this view has 200 measured departures yet. Flight counts are shown; on-time and delay charts become available when the sample is large enough.

View the figures

Month of year	On-time departures	Average departure delay	With departure time	Recorded flights
Jan	Fewer than 200 measured departures	—	31	31
Feb	Fewer than 200 measured departures	—	28	28
Mar	Fewer than 200 measured departures	—	28	28
Apr	No observations	—	—	—
May	No observations	—	—	—
Jun	No observations	—	—	—
Jul	No observations	—	—	—
Aug	No observations	—	—	—
Sep	Fewer than 200 measured departures	—	30	30
Oct	Fewer than 200 measured departures	—	29	31
Nov	Fewer than 200 measured departures	—	28	30
Dec	Fewer than 200 measured departures	—	31	31

Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.

Recorded outcomes

On time 65.1% 136
Delayed >15 min 33.0% 69
Cancelled 1.9% 4
Missing departure time 0.0% 0

All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.

On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from punctuality and average delay.

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