Houston (IAH) to Memphis (MEM): On-Time Performance
Data through July 2026
Houston (IAH) to Memphis (MEM) effectively runs on two schedules. In September 2025, 92% of arrivals were on time; in July 2024 that fell to 39% — a 53-point seasonal swing. Across the full period the route averages 76% on-time against a national 78%. Morning departures also hold up better than evening ones (84% vs 69%), which matters most in the rough months.
- On-time
- 76%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 1.2%
- Flights/day
- 3.0
- last 12 months
- Duration
- 1h 42m
- scheduled
- Distance
- 468 mi
Best airline from IAH to MEM
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 81% | 15 min | 1.0% | 1,082 |
| United Airlines | 69% | 20 min | 1.5% | 754 |
Monthly on-time trend
Best time to fly from IAH to MEM
Aim for departures around 8 a.m. (89% on-time); avoid 9 p.m. departures (40%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 20 min |
| Tuesday | 77% | 15 min |
| Wednesdaybest | 85% | 11 min |
| Thursday | 77% | 17 min |
| Friday | 68% | 19 min |
| Saturday | 75% | 18 min |
| Sunday | 74% | 19 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft45%
- Airline operations37%
- National airspace system13%
- Weather6%
Frequently asked questions
- How often are flights from IAH to MEM delayed?
- 24% of IAH–MEM 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 17 minutes.
- Which airline is most reliable from IAH to MEM?
- SkyWest Airlines has the best on-time record on this route at 81%, based on 1,082 flights. 2 airlines flew IAH–MEM frequently enough to compare in this period.
- What is the best time of day to fly from IAH to MEM?
- Departures around 8 a.m. have the best record (89% on-time), while departures around 9 p.m. have the worst (40%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from IAH to MEM?
- The scheduled IAH–MEM flight time averages 1h 42m over 468 miles. Actual arrival times vary — flights on this route land 15+ minutes late 24% of the time.
- How often are IAH to MEM flights cancelled?
- 1.2% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from IAH to MEM?
- July 2024 was the roughest month in this dataset, with only 39% of arrivals on time. The best was September 2025 at 92%. If your dates are flexible, that 53-point gap is worth planning around.
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Based on 1,836 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.