LAX to IAH flight delays & on-time performance
Nonstop flights from Los Angeles International Airport to George Bush Intercontinental Airport · 1,379 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at LAX or IAH right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Los Angeles (LAX) to Houston (IAH) arrived on time 85% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.5% were cancelled, and 5% arrived an hour or more late.
- United Airlines was the most punctual airline here (87% on time); Frontier Airlines was the least (70%).
- Departures scheduled around 5am did best (95% on time); around 1pm did worst (72%).
- Thursday was the most reliable day to fly (88% on time) and Saturday the least (82%).
- The largest source of delay minutes was late-arriving aircraft (37%).
Which airline is most on time from LAX to IAH?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 87% | 0.2% | 7 min | 3.1% | 3,438 |
| Delta Air Lines | 85% | 1.1% | 12 min | 5.7% | 646 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 83% | 0.5% | 13 min | 7.4% | 408 |
| Spirit Airlines | 76% | 1.3% | 20 min | 9.6% | 392 |
| Frontier Airlines | 70% | 1.5% | 24 min | 14.4% | 332 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 12am88%470 flights
- 5am95%307 flights
- 6am96%128 flights
- 7am93%307 flights
- 8am91%482 flights
- 9am84%350 flights
- 10am87%420 flights
- 11am83%299 flights
- 12pm87%171 flights
- 1pm72%567 flights
- 2pm75%269 flights
- 3pm78%144 flights
- 4pm88%234 flights
- 5pm85%137 flights
- 6pm80%529 flights
- 7pm84%203 flights
- 11pm89%196 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday85%0.6% cancelled
- Tuesday86%0.6% cancelled
- Wednesday87%0.1% cancelled
- Thursday88%0.1% cancelled
- Friday83%0.5% cancelled
- Saturday82%0.6% cancelled
- Sunday83%0.9% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft37%
- Airline (crew, maintenance, cleaning, fueling)35%
- Air traffic control & airport congestion27%
- Extreme weather1%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)58%
- Extreme weather42%
- Air traffic control & airport congestion0%
- Security0%
LAX to IAH: common questions
- How often are LAX to IAH flights on time?
- 85% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Los Angeles to Houston cancelled?
- 0.5% of scheduled flights were cancelled (26 of 5,216).
- How long are typical delays?
- Across all flights the average arrival delay was 10 min (early arrivals count as zero). Flights that were late arrived 62 min behind schedule on average, and 5.0% of flights were an hour or more late.
- How long is taxi time at LAX?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
Return trip: IAH to LAX — 84% on time
More flights from Los Angeles
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: LAX → IAH, nonstop flights by US airlines that report to the DOT. How we calculate this.