What's the busiest hour for departures at IAD?

Departures from Washington Dulles International Airport peak at 17:00 local time, averaging 77.8 flights per hour over the past 60 days.

What's the quietest hour to fly out of IAD?

The quietest hour with regular service is 01:00 local time, averaging 1 flights per hour.

Which airline operates the most flights from IAD?

United Airlines, (UA) is the largest operator at Washington Dulles International Airport, with 16381 observed departures in the past 60 days.

What's the most popular destination from IAD?

Atlanta (ATL) is the most-flown destination, with 715 observed departures in the past 60 days.

🇺🇸

IAD Airport - Washington Dulles International Airport

Washington, United States. Departures peak at 17:00 local, averaging 77.8 flights per hour.

Window: last 60 days. Last refreshed: 2026-08-12. Schedule coverage: 89 days observed.

Peak departure hour

17:00

77.8 flights/hr

Quietest active hour

01:00

1 flights/hr

Traffic score

85/100

Relative volume

Departures by hour (local time)

Avg per day, last 60 days

Total: 377 avg departures per day.

Weekday vs weekend departure pattern

Weekday avg per hour

Weekend avg per hour

Arrivals by hour (local time)

Avg per day, last 60 days

Peak arrival hour: 11:00 local (59.9 flights/hr). Total: 374.4 avg arrivals/day.

Top airlines

1. United Airlines, (UA) 16,381
2. Delta Air Lines, (DL) 976
3. American Airlines (AA) 506
4. Avianca - Aerovias Nacionales de Colombia, (AV) 399
5. Frontier Airlines, (F9) 390

Top destinations

1. 🇺🇸 Atlanta (ATL) 715
2. 🇺🇸 Charlotte (CLT) 515
3. 🇺🇸 Denver (DEN) 511
4. 🇺🇸 Los Angeles (LAX) 465
5. 🇺🇸 Chicago (ORD) 426

Frequently asked

What's the busiest hour for departures at IAD?: Departures from Washington Dulles International Airport peak at 17:00 local time, averaging 77.8 flights per hour over the past 60 days.
What's the quietest hour to fly out of IAD?: The quietest hour with regular service is 01:00 local time, averaging 1 flights per hour.
Which airline operates the most flights from IAD?: United Airlines, (UA) is the largest operator at Washington Dulles International Airport, with 16381 observed departures in the past 60 days.
What's the most popular destination from IAD?: Atlanta (ATL) is the most-flown destination, with 715 observed departures in the past 60 days.

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