Skip to content
WanderNerd
Check a flight

Route Reliability

Chicago → Washington

ORD–IAD · 588 miles · Chicago O'Hare International Airport to Washington Dulles International Airport

76
Usually Fine
WanderNerd Reliability Score
74%
Arrive within 15 minutes
16 min
Average arrival delay
0.6%
Cancelled
2,021
Flights in the data

Data through May 2026.

United Airlines is the only airline in this data on this route, arriving on time 74% of the time across 2,021 flights. No comparison to make.

What the data says

Morning flights do better here.

ORD–IAD flights departing between 9 AM–12 PM arrived on time 87% of the time, versus 53% between 3–6 PM.

Sunday scaries are real for this one.

ORD–IAD flights arrived on time 78% of the time on Tuesdays. On Sundays: 69%.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon73%(286 flights)
  • Tue78%(282 flights)
  • Wed71%(287 flights)
  • Thu73%(287 flights)
  • Fri74%(288 flights)
  • Sat77%(282 flights)
  • Sun69%(292 flights)
On-time by departure window
  • 6–9 AM85%(374 flights)
  • 9 AM–12 PM87%(211 flights)
  • 12–3 PM73%(711 flights)
  • 3–6 PM53%(235 flights)
  • 6–9 PM67%(194 flights)
  • 9 PM–12 AM70%(279 flights)
On-time trend by month
79%
May

Jun 66% → May 79% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202566%178
July 202560%181
August 202573%195
September 202583%201
October 202576%177
November 202572%148
December 202573%145
January 202676%125
February 202680%112
March 202667%145
April 202677%181
May 202679%216

Same trip, other airports

Keep nerding

Based on 2,021 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.