Route on-time record

LAX to IAH: most on-time flights and the best time to fly

Los Angeles (Los Angeles International Airport) to Houston (George Bush Intercontinental Airport). 5,291 nonstop flights in Jun 2025 to May 2026, 84% arrived within 15 minutes and 0.7% were cancelled. The most reliable flight number was United 744 at 6:45 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

LAX → IAH

Los Angeles to Houston: 5,291 nonstop flights a year

On time (12 months)

84%

Cancelled

0.7%

avg delay 12 min

Best time to leave

Before 9 AM

93% on time vs 73% noon to 3 PM

Most reliable airline

United

86% chance on time

Check LAX to IAH fares

Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Most reliable nonstop flights

Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.

#1 · United 744
6:45 AM → 12:06 PM3h 21m nonstop
Local times, typical schedule. Last flown 2026-05-20.
96%
chance on time
On time (history)
99%
Cancelled
0.0%
Avg arrival delay
1 min
- Arrived on time 99% of the time (74 flights, Jun 2025 to May 2026).
- Never cancelled in 74 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; Noon to 3 PM: 73%).
- Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
Moderate track record · 74 flights
Find United 744 fares Opens this date on Aviasales
#2 · United 654
5:45 AM → 11:12 AM3h 22m nonstop
Local times, typical schedule. Last flown 2026-05-31.
94%
chance on time
On time (history)
95%
Cancelled
0.0%
Avg arrival delay
3 min
- Arrived on time 95% of the time (248 flights, Jun 2025 to May 2026).
- Never cancelled in 249 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; Noon to 3 PM: 73%).
- Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
Strong track record · 248 flights
Find United 654 fares Opens this date on Aviasales
#3 · United 1397
7:05 AM → 12:34 PM3h 29m nonstop
Local times, typical schedule. Last flown 2026-05-31.
94%
chance on time
On time (history)
94%
Cancelled
0.0%
Avg arrival delay
3 min
- Arrived on time 94% of the time (104 flights, Jun 2025 to May 2026).
- Never cancelled in 104 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; Noon to 3 PM: 73%).
- Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
Moderate track record · 104 flights
Find United 1397 fares Opens this date on Aviasales
#4 · United 1416
8:15 AM → 1:37 PM3h 20m nonstop
Local times, typical schedule. Last flown 2026-05-31.
92%
chance on time
On time (history)
92%
Cancelled
0.0%
Avg arrival delay
5 min
- Arrived on time 92% of the time (318 flights, Jun 2025 to May 2026).
- Never cancelled in 324 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; Noon to 3 PM: 73%).
- Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
Strong track record · 318 flights
Find United 1416 fares Opens this date on Aviasales
#5 · United 491
12:55 AM → 6:10 AM3h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31.
92%
chance on time
On time (history)
93%
Cancelled
1.4%
Avg arrival delay
4 min
- Arrived on time 93% of the time (281 flights, Jun 2025 to May 2026).
- Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
Strong track record · 281 flights
Find United 491 fares Opens this date on Aviasales
#6 · United 1852
7:20 AM → 12:38 PM3h 18m nonstop
Local times, typical schedule. Last flown 2026-03-28.
91%
chance on time
On time (history)
88%
Cancelled
0.0%
Avg arrival delay
15 min
- Arrived on time 88% of the time (24 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; Noon to 3 PM: 73%).
- Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
- Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
Limited track record · 24 flights
Find United 1852 fares Opens this date on Aviasales
#7 · Delta 1143
9:00 AM → 2:12 PM3h 14m nonstop
Local times, typical schedule. Last flown 2026-05-31.
87%
chance on time
On time (history)
88%
Cancelled
0.8%
Avg arrival delay
10 min
- Arrived on time 88% of the time (356 flights, Jun 2025 to May 2026).
- Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
- Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
Strong track record · 356 flights
Find Delta 1143 fares Opens this date on Aviasales
#8 · United 277
10:15 AM → 3:40 PM3h 22m nonstop
Local times, typical schedule. Last flown 2026-05-31.
87%
chance on time
On time (history)
87%
Cancelled
0.0%
Avg arrival delay
16 min
- Arrived on time 87% of the time (87 flights, Jun 2025 to May 2026).
- Never cancelled in 88 scheduled flights.
- Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
- Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
Moderate track record · 87 flights
Find United 277 fares Opens this date on Aviasales
#9 · Spirit 470
5:30 AM → 10:34 AM3h 04m nonstop
Local times, typical schedule. Last flown 2026-05-01.
85%
chance on time
On time (history)
87%
Cancelled
6.3%
Avg arrival delay
8 min
- Arrived on time 87% of the time (15 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; Noon to 3 PM: 73%).
- Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
- Short track record (15 flights), so its score leans on the airline's record at this hour.
Limited track record · 15 flights
Find Spirit 470 fares Opens this date on Aviasales
#10 · United 2372
11:59 PM → 5:17 AM3h 18m nonstop
Local times, typical schedule. Last flown 2026-05-20. Same departure also flew as United 2282; its record covers all of them.
85%
chance on time
On time (history)
84%
Cancelled
0.0%
Avg arrival delay
8 min
- Arrived on time 84% of the time (77 flights, Jun 2025 to May 2026).
- Never cancelled in 77 scheduled flights.
- Departs outside LAX's trouble window (4 PM to 10 PM, when 53% of its 15 ground stops and delay programs started).
Moderate track record · 77 flights
Find United 2372 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

United Airlines86%
3,394 flights · 87% on time as flown · 0.4% cancel
Delta Air Lines86%
646 flights · 87% on time as flown · 1.1% cancel
SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)82%
409 flights · 83% on time as flown · 0.4% cancel
Spirit Airlines77%
510 flights · 77% on time as flown · 1.4% cancel
Frontier Airlines66%
332 flights · 64% on time as flown · 1.5% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

Before 9 AM93%
1,311 flights · avg delay 5 min
9 AM to noon85%
991 flights · avg delay 11 min
Noon to 3 PM73%
1,096 flights · avg delay 19 min
3 to 6 PM83%
431 flights · avg delay 12 min
6 to 9 PM81%
740 flights · avg delay 13 min
After 9 PM88%
722 flights · avg delay 11 min

Best day: Tuesday (87%). Worst: Sunday (83%).

Smarter routing

Nearby airports that run more on time

SNA → IAH 88% chance on time
John Wayne Orange County International Airport to George Bush Intercontinental Airport · 1,094 flights a year · 36 mi from your airports · yours: 83%
Rank flights Fares

On time by month

All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.

What delays this route

Airline (crew, maintenance, boarding)35%
Late-arriving aircraft34%
Air traffic control and airport volume30%
Severe weather2%

Share of delay minutes by the cause airlines report to the US DOT.

Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure

LAX to IAH questions

What time of day is best to fly LAX to IAH?: Before 9 AM: 93% of flights arrived on time, against 73% for departures noon to 3 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
Which airline is most on time from LAX to IAH?: United, with a season-adjusted 86% chance of operating and arriving on time over 3,394 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
What is the worst month for delays on LAX to IAH?: July (79% on time); the best was September (91%), averaged over Jun 2023 to May 2026.
Is this a prediction for my flight?: No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.

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