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Flight Reliability

UA 6126 · United Airlines

Washington → Kansas City (IAD–MCI)97% of its flights flew this route. The rest (IAH–COS, IAH–MFE) are included in these numbers.

76
Usually Fine
WanderNerd Reliability Score
74%
Arrive within 15 minutes
16 min
Average arrival delay
0.6%
Cancelled
6 min early
Median arrival delay

Based on 358 historical flights. Data through May 2026.

What the data says

Friday is doing you no favors.

UA 6126 arrived on time 87% of the time on Tuesdays and just 64% on Fridays. That gap is worth planning around.

A bit behind the IAD–MCI route.

UA 6126 arrived on time 74% of the time, versus 78% across the IAD–MCI route.

A bit behind the United Airlines network.

UA 6126 arrived on time 74% of the time, versus 79% across the United Airlines network.

Ticking up lately.

UA 6126 arrived on time 82% of the time over the last three months in the data, compared with 78% in the three months before that.

The breakdown

On-time by weekday
  • Mon69%(52 flights)
  • Tue87%(52 flights)
  • Wed78%(51 flights)
  • Thu81%(52 flights)
  • Fri64%(52 flights)
  • Sat68%(47 flights)
  • Sun74%(49 flights)
On-time by departure window
  • 12–3 PM—(1 flights)
  • 3–6 PM74%(277 flights)
  • 6–9 PM75%(77 flights)
On-time trend by month
83%
May

Jun 48% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202548%29
July 202545%31
August 202571%31
September 202587%30
October 202577%31
November 202587%30
December 202568%31
January 202681%26
February 202685%27
March 202677%30
April 202687%30
May 202683%29
Departures on time
78%
Diverted
0.3%
Flights flown
355
Months covered
12

Same route, other flights

Keep nerding

Based on 358 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.