Skip to content
WanderNerd
Check a flight

Route Reliability

Atlanta → Houston

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

76
Usually Fine
WanderNerd Reliability Score
76%
Arrive within 15 minutes
10 min
Average arrival delay
2.0%
Cancelled
5,365
Flights in the data

Data through May 2026.

Who flies it best

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

  1. 1.United Airlines84%1,691 flights
  2. 2.Delta Air Lines77%2,492 flights
  3. 3.Frontier Airlines66%738 flights
  4. 4.Spirit Airlines65%444 flights

What the data says

Morning flights do better here.

ATL–IAH flights departing between 6–9 AM arrived on time 85% of the time, versus 68% between 9 PM–12 AM.

Monday is the weak spot.

ATL–IAH flights arrived on time 81% of the time on Wednesdays. On Mondays: 73%.

United Airlines has a clear lead on this route.

United Airlines arrived on time 84% of the time on this route; Spirit Airlines managed 65%.

Slipping a little lately.

ATL–IAH flights arrived on time 76% of the time over the last three months in the data, compared with 81% 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
  • Mon73%(793 flights)
  • Tue80%(717 flights)
  • Wed81%(717 flights)
  • Thu77%(791 flights)
  • Fri76%(786 flights)
  • Sat75%(671 flights)
  • Sun74%(772 flights)
On-time by departure window
  • 3–6 AM—(2 flights)
  • 6–9 AM85%(851 flights)
  • 9 AM–12 PM83%(1216 flights)
  • 12–3 PM78%(625 flights)
  • 3–6 PM69%(1030 flights)
  • 6–9 PM73%(799 flights)
  • 9 PM–12 AM68%(724 flights)
On-time trend by month
70%
May

Jun 61% → May 70% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202561%447
July 202568%473
August 202574%456
September 202587%426
October 202580%464
November 202582%428
December 202577%418
January 202678%400
February 202686%386
March 202676%419
April 202681%471
May 202670%459

Same trip, other airports

Keep nerding

Based on 5,365 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.