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Route Reliability

Houston → SGF

IAH–SGF · 513 miles · George Bush Intercontinental Airport to SGF Airport

80
Pretty Reliable
WanderNerd Reliability Score
80%
Arrive within 15 minutes
10 min
Average arrival delay
1.6%
Cancelled
1,129
Flights in the data

Data through May 2026.

United Airlines is the only airline in this data on this route, arriving on time 80% of the time across 1,129 flights. No comparison to make.

What the data says

The 12–3 PM departure wins.

IAH–SGF flights departing between 12–3 PM arrived on time 83% of the time, versus 75% between 3–6 PM.

Sunday scaries are real for this one.

IAH–SGF flights arrived on time 85% of the time on Tuesdays. On Sundays: 74%.

Slipping a little lately.

IAH–SGF flights arrived on time 80% of the time over the last three months in the data, compared with 84% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon79%(168 flights)
  • Tue85%(136 flights)
  • Wed78%(152 flights)
  • Thu83%(166 flights)
  • Fri83%(166 flights)
  • Sat82%(157 flights)
  • Sun74%(162 flights)
On-time by departure window
  • 12–3 PM83%(533 flights)
  • 3–6 PM75%(195 flights)
  • 6–9 PM79%(379 flights)
On-time trend by month
78%
May

Jun 69% → May 78% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202569%83
July 202576%104
August 202582%98
September 202587%86
October 202578%97
November 202581%106
December 202580%93
January 202688%85
February 202684%79
March 202685%84
April 202677%88
May 202678%104

Keep nerding

Based on 1,129 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.