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Flight Reliability

UA 5004 · United Airlines

Houston → GPT (IAH–GPT)96% of its flights flew this route. The rest (CRP–IAH) are included in these numbers.

83
Pretty Reliable
WanderNerd Reliability Score
83%
Arrive within 15 minutes
6 min
Average arrival delay
1.8%
Cancelled
10 min early
Median arrival delay

Based on 283 historical flights. Data through May 2026.

What the data says

3–6 PM has a slight edge.

Departures between 3–6 PM arrived on time 90% of the time, against 83% between 6–9 PM.

Wednesdays have been rough.

UA 5004 arrived on time 97% of the time on Mondays and just 73% on Wednesdays. That gap is worth planning around.

A bit ahead of the United Airlines network.

UA 5004 arrived on time 83% of the time, versus 79% across the United Airlines network.

Recent months have been rougher.

UA 5004 arrived on time 79% of the time over the last three months in the data, compared with 91% in the three months before that.

The breakdown

On-time by weekday
  • Mon97%(37 flights)
  • Tue76%(41 flights)
  • Wed73%(40 flights)
  • Thu83%(42 flights)
  • Fri82%(33 flights)
  • Sat87%(38 flights)
  • Sun87%(46 flights)
On-time by departure window
  • 3–6 PM90%(10 flights)
  • 6–9 PM83%(267 flights)
On-time trend by month
82%
May

Jun 68% → May 82% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202568%25
July 202577%22
August 202580%25
September 202593%30
October 202592%25
January 202688%33
February 202694%31
March 202676%29
April 202680%30
May 202682%27
Departures on time
82%
Diverted
0.4%
Flights flown
277
Months covered
10

Same route, other flights

Keep nerding

Based on 283 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.