Skip to content
WanderNerd
Check a flight

Route Reliability

Houston → Washington

IAH–IAD · 1,190 miles · George Bush Intercontinental Airport to Washington Dulles International Airport

86
Pretty Reliable
WanderNerd Reliability Score
80%
Arrive within 15 minutes
7 min
Average arrival delay
0.6%
Cancelled
1,862
Flights in the data

Data through May 2026.

United Airlines is the only airline in this data on this route, arriving on time 80% of the time across 1,862 flights. No comparison to make.

What the data says

Morning-you made the right choice.

IAH–IAD flights departing between 6–9 AM arrived on time 91% of the time, versus 73% between 6–9 PM.

Friday is doing you no favors.

IAH–IAD flights arrived on time 84% of the time on Tuesdays. On Fridays: 77%.

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
  • Mon81%(263 flights)
  • Tue84%(255 flights)
  • Wed78%(262 flights)
  • Thu83%(266 flights)
  • Fri77%(269 flights)
  • Sat80%(267 flights)
  • Sun79%(269 flights)
On-time by departure window
  • 6–9 AM91%(360 flights)
  • 9 AM–12 PM83%(60 flights)
  • 12–3 PM84%(411 flights)
  • 3–6 PM78%(406 flights)
  • 6–9 PM73%(614 flights)
On-time trend by month
86%
May

Jun 63% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%172
July 202558%154
August 202575%174
September 202593%193
October 202585%180
November 202582%148
December 202586%140
January 202689%125
February 202684%111
March 202675%143
April 202689%146
May 202686%165

Same trip, other airports

Keep nerding

Based on 1,862 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.