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Flight Reliability

UA 1388 · United Airlines

Houston → Dallas–Fort Worth (IAH–DFW)82% of its flights flew this route. The rest (RSW–IAH, SLC–IAH) are included in these numbers.

78
Usually Fine
WanderNerd Reliability Score
80%
Arrive within 15 minutes
12 min
Average arrival delay
1.9%
Cancelled
7 min early
Median arrival delay

Based on 418 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

UA 1388 departing between 9 AM–12 PM arrived on time 98% of the time, versus 76% between 12–3 PM.

Friday is doing you no favors.

UA 1388 arrived on time 86% of the time on Saturdays. On Fridays: 72%.

A bit ahead of the IAH–DFW route.

UA 1388 arrived on time 80% of the time, versus 76% across the IAH–DFW route.

Slipping a little lately.

UA 1388 arrived on time 81% of the time over the last three months in the data, compared with 86% in the three months before that.

The breakdown

On-time by weekday
  • Mon75%(61 flights)
  • Tue83%(57 flights)
  • Wed74%(62 flights)
  • Thu82%(62 flights)
  • Fri72%(61 flights)
  • Sat86%(50 flights)
  • Sun86%(56 flights)
On-time by departure window
  • 6–9 AM91%(23 flights)
  • 9 AM–12 PM98%(54 flights)
  • 12–3 PM76%(332 flights)
On-time trend by month
64%
May

Jun 54% → May 64% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202554%26
July 202566%29
August 202579%48
September 202570%30
October 202584%31
November 202575%20
December 202581%31
January 202689%28
February 202689%28
March 202691%55
April 202689%55
May 202664%28
Departures on time
81%
Diverted
0.2%
Flights flown
409
Months covered
12

Same route, other flights

Keep nerding

Based on 418 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.