Washington, DC → Chicago, IL flight delays
IAD → ORD · all airlines · 217 flights · May 2026 · source: US BTS
This route is delayed
23%of the time, by +65 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
77%
Delayed 3h+
1.8%
Cancelled
0%
Avg when late
+65m
Best & worst day to fly
Most on-time
Thursday
delayed 14%
Worst
Wednesday
delayed 34%
Frequently asked
How often is the Washington, DC to Chicago, IL flight delayed?
About 23% of IAD → ORD flights arrive late (15+ minutes), by an average of 65 minutes when they do, based on 217 flights in May 2026.
What is the best day to fly IAD → ORD?
Thursday is the most on-time (delayed 14%), while Wednesday is the worst (delayed 34%).
Airport overviews