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Route Reliability

Houston → Atlanta

IAH–ATL · 689 miles · George Bush Intercontinental Airport to Hartsfield–Jackson Atlanta International Airport

77
Usually Fine
WanderNerd Reliability Score
78%
Arrive within 15 minutes
9 min
Average arrival delay
2.0%
Cancelled
5,356
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.United Airlines81%1,692 flights
  2. 2.Delta Air Lines81%2,491 flights
  3. 3.Spirit Airlines76%435 flights
  4. 4.Frontier Airlines61%738 flights

What the data says

Morning flights do better here.

IAH–ATL flights departing between 3–6 AM arrived on time 86% of the time, versus 66% between 3–6 PM.

Sunday scaries are real for this one.

IAH–ATL flights arrived on time 83% of the time on Wednesdays. On Sundays: 74%.

United Airlines has a clear lead on this route.

United Airlines arrived on time 81% of the time on this route; Frontier Airlines managed 61%.

Recent months have been rougher.

IAH–ATL flights arrived on time 73% of the time over the last three months in the data, compared with 83% 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
  • Mon75%(779 flights)
  • Tue80%(704 flights)
  • Wed83%(733 flights)
  • Thu79%(797 flights)
  • Fri76%(779 flights)
  • Sat77%(677 flights)
  • Sun74%(775 flights)
On-time by departure window
  • 3–6 AM86%(451 flights)
  • 6–9 AM83%(1227 flights)
  • 9 AM–12 PM81%(890 flights)
  • 12–3 PM78%(900 flights)
  • 3–6 PM66%(636 flights)
  • 6–9 PM72%(1137 flights)
  • 9 PM–12 AM—(3 flights)
On-time trend by month
72%
May

Jun 63% → May 72% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%453
July 202571%475
August 202579%453
September 202592%425
October 202582%467
November 202581%426
December 202581%417
January 202682%399
February 202686%382
March 202668%418
April 202680%469
May 202672%460

Same trip, other airports

Keep nerding

Based on 5,356 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.