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Flight Reliability

UA 1627 · United Airlines

Houston → Washington (IAH–DCA)81% of its flights flew this route. The rest (LGA–IAH, OMA–IAH) are included in these numbers.

68
Usually Fine
WanderNerd Reliability Score
67%
Arrive within 15 minutes
18 min
Average arrival delay
0.7%
Cancelled
2 min early
Median arrival delay

Based on 444 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

UA 1627 departing between 3–6 PM arrived on time 81% of the time, versus 64% between 6–9 PM.

Skip Thursday if you can.

UA 1627 arrived on time 74% of the time on Saturdays. On Thursdays: 63%.

Lagging the IAH–DCA route.

UA 1627 arrived on time 67% of the time, versus 76% across the IAH–DCA route.

Lagging the United Airlines network.

UA 1627 arrived on time 67% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon72%(64 flights)
  • Tue73%(63 flights)
  • Wed64%(63 flights)
  • Thu63%(65 flights)
  • Fri64%(67 flights)
  • Sat74%(53 flights)
  • Sun64%(66 flights)
On-time by departure window
  • 6–9 AM—(9 flights)
  • 12–3 PM80%(49 flights)
  • 3–6 PM81%(26 flights)
  • 6–9 PM64%(357 flights)
On-time trend by month
74%
May

Jun 48% → May 74% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202548%29
July 202537%30
August 202550%28
September 202577%35
October 202575%52
November 202566%29
December 202593%45
January 202677%34
February 202657%28
March 202658%31
April 202665%31
May 202674%69
Departures on time
68%
Diverted
0%
Flights flown
441
Months covered
12

Same route, other flights

Keep nerding

Based on 444 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.