New York (LGA) to Houston (IAH): On-Time Performance
Data through July 2026
New York (LGA) to Houston (IAH) effectively runs on two schedules. In October 2024, 92% of arrivals were on time; in July 2024 that fell to 62% — a 30-point seasonal swing. Across the full period the route averages 77% on-time against a national 78%. Morning departures also hold up better than evening ones (87% vs 64%), which matters most in the rough months.
- On-time
- 77%
- arrived <15 min late
- Avg delay
- 20 min
- completed flights
- Cancelled
- 2.5%
- Flights/day
- 11
- last 12 months
- Duration
- 4h 4m
- scheduled
- Distance
- 1,416 mi
Best airline from LGA to IAH
4 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Spirit Airlinesmost reliable | 81% | 15 min | 2.9% | 792 |
| United Airlines | 78% | 19 min | 2.0% | 4,846 |
| Delta Air Lines | 75% | 22 min | 3.2% | 2,788 |
| SkyWest Airlines | 75% | 33 min | 2.8% | 290 |
Monthly on-time trend
Best time to fly from LGA to IAH
Aim for departures around 5 a.m. (96% on-time); avoid 4 p.m. departures (49%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 77% | 24 min |
| Tuesday | 78% | 20 min |
| Wednesday | 77% | 19 min |
| Thursday | 77% | 22 min |
| Friday | 78% | 18 min |
| Saturdaybest | 81% | 16 min |
| Sunday | 75% | 20 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft32%
- Airline operations33%
- National airspace system27%
- Weather8%
Frequently asked questions
- How often are flights from LGA to IAH delayed?
- 23% of LGA–IAH flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 20 minutes.
- Which airline is most reliable from LGA to IAH?
- Spirit Airlines has the best on-time record on this route at 81%, based on 792 flights. 4 airlines flew LGA–IAH frequently enough to compare in this period.
- What is the best time of day to fly from LGA to IAH?
- Departures around 5 a.m. have the best record (96% on-time), while departures around 4 p.m. have the worst (49%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from LGA to IAH?
- The scheduled LGA–IAH flight time averages 4h 4m over 1,416 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
- How often are LGA to IAH flights cancelled?
- 2.5% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from LGA to IAH?
- July 2024 was the roughest month in this dataset, with only 62% of arrivals on time. The best was October 2024 at 92%. If your dates are flexible, that 30-point gap is worth planning around.
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Based on 8,716 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.