Skip to content
WanderNerd
Check a flight

Flight Reliability

UA 4879 · United Airlines

GPT → Houston (GPT–IAH)83% of its flights flew this route. The rest (IAH–HSV) are included in these numbers.

90
Nerd Approved
WanderNerd Reliability Score
87%
Arrive within 15 minutes
3 min
Average arrival delay
1.0%
Cancelled
11 min early
Median arrival delay

Based on 308 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

UA 4879 departing between 6–9 AM arrived on time 89% of the time, versus 77% between 12–3 PM.

Saturdays have been rough.

UA 4879 arrived on time 95% of the time on Mondays and just 78% on Saturdays. That gap is worth planning around.

A bit ahead of the GPT–IAH route.

UA 4879 arrived on time 87% of the time, versus 83% across the GPT–IAH route.

Better than the United Airlines network average.

UA 4879 arrived on time 87% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon95%(43 flights)
  • Tue84%(43 flights)
  • Wed91%(43 flights)
  • Thu87%(45 flights)
  • Fri89%(45 flights)
  • Sat78%(41 flights)
  • Sun84%(44 flights)
On-time by departure window
  • 6–9 AM89%(253 flights)
  • 12–3 PM77%(51 flights)
On-time trend by month
78%
May

Jun 87% → May 78% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 202590%30
August 202590%31
September 202597%30
October 202594%31
November 202580%30
December 202581%31
January 202697%30
February 202680%10
March 202678%23
May 202678%27
Departures on time
89%
Diverted
0.3%
Flights flown
304
Months covered
12

Same route, other flights

Keep nerding

Based on 308 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.