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Flight Reliability

UA 5278 · United Airlines

Houston → Oklahoma City (IAH–OKC)82% of its flights flew this route. The rest (ORD–HSV, ATW–ORD) are included in these numbers.

64
A Little Dicey
WanderNerd Reliability Score
70%
Arrive within 15 minutes
19 min
Average arrival delay
2.3%
Cancelled
3 min early
Median arrival delay

Based on 349 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

UA 5278 departing between 3–6 PM arrived on time 78% of the time, versus 68% between 6–9 PM.

Saturdays have been rough.

UA 5278 arrived on time 86% of the time on Wednesdays and just 55% on Saturdays. That gap is worth planning around.

Lagging the IAH–OKC route.

UA 5278 arrived on time 70% of the time, versus 82% across the IAH–OKC route.

Lagging the United Airlines network.

UA 5278 arrived on time 70% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon59%(49 flights)
  • Tue74%(49 flights)
  • Wed86%(50 flights)
  • Thu79%(48 flights)
  • Fri79%(48 flights)
  • Sat55%(47 flights)
  • Sun58%(50 flights)
On-time by departure window
  • 12–3 PM—(6 flights)
  • 3–6 PM78%(90 flights)
  • 6–9 PM68%(245 flights)
On-time trend by month
68%
May

Jun 52% → May 68% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202552%29
July 202560%30
August 202565%31
September 202567%30
October 202581%31
November 202574%27
December 202571%31
January 202679%29
February 202691%11
March 202673%26
April 202676%29
May 202668%37
Departures on time
70%
Diverted
0%
Flights flown
341
Months covered
12

Same route, other flights

Keep nerding

Based on 349 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.