United's mid-Atlantic hub and the DC area's main long-haul international gateway. Famous for its mobile lounges and a long walk between the main terminal and the midfield concourses.
Planning to fly from IAD?
Check Current BusynessIAD crowd patterns — by the numbers
From our modelWe modeled a full typical week at IAD — every hour, every day, every aircraft size — to surface patterns that show up week-over-week. Here's what Washington Dulles International actually looks like.
When is IAD actually busy?
Crowd score by local hour, averaged across the typical week. Hover any bar for the exact value.
Best times to fly out of IAD
- 10 PM
Off-peak hours
low - 9 PM
Late-evening wind-down
low - 5 PM
Off-peak hours
low
Worst times to fly out of IAD
- 5 AM
Sustained peak window
medium - 12 PM
Sustained peak window
medium - 1 PM
Sustained peak window
medium
Day of the week: when is IAD most painful?
Avg crowd score across daytime hours (6 AM – 10 PM local).
Aircraft mix at peak hour
Wide-body and regional jets disproportionately affect crowd levels — they unload at very different rates.
How IAD compares to other major hubs
Avg crowd score across daytime hours. Lower = easier travel day.
- IADWashington6.7
- ATLAtlanta6.6
- JFKNew York6.2
- DFWDallas6.2
- ORDChicago6.1
- LAXLos Angeles5.8
Reserve parking at IAD — Washington — often 30-70% cheaper than drive-up
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Typical range
$8–28
per day, near IAD
Vs. drive-up
Save 30-70%
Ready to check how busy IAD will be?
Check Airport Busyness