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Flight Reliability

UA 4836 · United Airlines

Houston → BTR (IAH–BTR)85% of its flights flew this route. The rest (IAD–PHL, IAD–PVD) are included in these numbers.

89
Pretty Reliable
WanderNerd Reliability Score
83%
Arrive within 15 minutes
4 min
Average arrival delay
0.5%
Cancelled
11 min early
Median arrival delay

Based on 190 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

UA 4836 departing between 12–3 PM arrived on time 86% of the time, versus 78% between 3–6 PM.

Mondays have been rough.

UA 4836 arrived on time 93% of the time on Tuesdays and just 63% on Mondays. That gap is worth planning around.

A bit ahead of the United Airlines network.

UA 4836 arrived on time 83% of the time, versus 79% across the United Airlines network.

Ticking up lately.

UA 4836 arrived on time 86% of the time over the last three months in the data, compared with 81% in the three months before that.

The breakdown

On-time by weekday
  • Mon63%(16 flights)
  • Tue93%(27 flights)
  • Wed92%(25 flights)
  • Thu87%(31 flights)
  • Fri85%(33 flights)
  • Sat77%(26 flights)
  • Sun77%(31 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM79%(63 flights)
  • 12–3 PM86%(106 flights)
  • 3–6 PM78%(18 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
75%
May

Jun 53% → May 75% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202553%15
July 202589%27
August 202582%17
December 202579%14
January 202681%31
February 2026100%26
March 202682%28
May 202675%16
Departures on time
85%
Diverted
0%
Flights flown
189
Months covered
12

Same route, other flights

Keep nerding

Based on 190 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.