Washington, DC → Denver, CO flight delays
IAD → DEN · all airlines · 291 flights · April 2026 · source: US BTS
This route is delayed
12%of the time, by +67 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
88%
Delayed 3h+
1.4%
Cancelled
0%
Avg when late
+67m
Best & worst day to fly
Most on-time
Wednesday
delayed 7%
Worst
Friday
delayed 25%
Which airline is most punctual on IAD → DEN?
Uniteddelayed 7%
Southwestdelayed 30%
Frequently asked
How often is the Washington, DC to Denver, CO flight delayed?
About 12% of IAD → DEN flights arrive late (15+ minutes), by an average of 67 minutes when they do, based on 291 flights in April 2026.
Which airline is most punctual on IAD → DEN?
United, delayed 7% of the time — the best of the 2 airlines flying this route.
What is the best day to fly IAD → DEN?
Wednesday is the most on-time (delayed 7%), while Friday is the worst (delayed 25%).
Airport overviews