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Route Reliability

Houston → Los Angeles

IAH–LAX · 1,379 miles · George Bush Intercontinental Airport to Los Angeles International Airport

88
Pretty Reliable
WanderNerd Reliability Score
84%
Arrive within 15 minutes
1 min
Average arrival delay
0.7%
Cancelled
5,294
Flights in the data

Data through May 2026.

Who flies it best

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

  1. 1.Delta Air Lines89%646 flights
  2. 2.United Airlines84%3,394 flights
  3. 3.Spirit Airlines84%513 flights
  4. 4.American Airlines80%409 flights
  5. 5.Frontier Airlines71%332 flights

What the data says

Morning flights do better here.

IAH–LAX flights departing between 6–9 AM arrived on time 94% of the time, versus 75% between 6–9 PM.

Saturday is the weak spot.

IAH–LAX flights arrived on time 88% of the time on Wednesdays. On Saturdays: 81%.

Delta Air Lines has a clear lead on this route.

Delta Air Lines arrived on time 89% of the time on this route; Frontier Airlines managed 71%.

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
  • Mon84%(768 flights)
  • Tue86%(718 flights)
  • Wed88%(739 flights)
  • Thu82%(781 flights)
  • Fri83%(775 flights)
  • Sat81%(683 flights)
  • Sun82%(788 flights)
On-time by departure window
  • 3–6 AM84%(19 flights)
  • 6–9 AM94%(1264 flights)
  • 9 AM–12 PM81%(586 flights)
  • 12–3 PM88%(690 flights)
  • 3–6 PM81%(953 flights)
  • 6–9 PM75%(1167 flights)
  • 9 PM–12 AM80%(573 flights)
On-time trend by month
86%
May

Jun 72% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202572%424
July 202579%449
August 202587%436
September 202587%439
October 202585%492
November 202581%443
December 202585%444
January 202687%431
February 202686%397
March 202686%441
April 202683%435
May 202686%421

Same trip, other airports

Keep nerding

Based on 5,294 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.