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Flight Reliability

UA 5511 · United Airlines

SGF → Denver (SGF–DEN)84% of its flights flew this route. The rest (ELP–ORD, ORD–PIA) are included in these numbers.

85
Pretty Reliable
WanderNerd Reliability Score
84%
Arrive within 15 minutes
4 min
Average arrival delay
1.5%
Cancelled
12 min early
Median arrival delay

Based on 330 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

UA 5511 departing between 9 AM–12 PM arrived on time 100% of the time, versus 83% between 12–3 PM.

Skip Thursday if you can.

UA 5511 arrived on time 88% of the time on Sundays. On Thursdays: 78%.

A bit ahead of the SGF–DEN route.

UA 5511 arrived on time 84% of the time, versus 79% across the SGF–DEN route.

A bit ahead of the United Airlines network.

UA 5511 arrived on time 84% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon83%(48 flights)
  • Tue81%(43 flights)
  • Wed87%(47 flights)
  • Thu78%(45 flights)
  • Fri82%(45 flights)
  • Sat87%(46 flights)
  • Sun88%(50 flights)
On-time by departure window
  • 6–9 AM—(3 flights)
  • 9 AM–12 PM100%(15 flights)
  • 12–3 PM83%(294 flights)
  • 9 PM–12 AM83%(12 flights)
On-time trend by month
62%
May

Jun 73% → May 62% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%30
July 202580%30
August 202587%31
September 202590%30
October 202587%31
November 2025100%28
December 202581%31
January 202694%31
February 202682%28
April 202681%16
May 202662%29
Departures on time
85%
Diverted
0.3%
Flights flown
324
Months covered
12

Same route, other flights

Keep nerding

Based on 330 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.