Houston (IAH) to Memphis (MEM): On-Time Performance
Data through May 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 75% on-time against a national 78%. Morning departures also hold up better than evening ones (84% vs 68%), which matters most in the rough months.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 1.2%
- Flights/day
- 3.0
- last 12 months
- Duration
- 1h 41m
- scheduled
- Distance
- 468 mi
Best airline from IAH to MEM
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 80% | 15 min | 0.9% | 967 |
| United Airlines | 68% | 21 min | 1.5% | 720 |
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 (43%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 19 min |
| Tuesday | 78% | 16 min |
| Wednesdaybest | 83% | 13 min |
| Thursday | 75% | 18 min |
| Friday | 68% | 20 min |
| Saturday | 73% | 20 min |
| Sunday | 74% | 18 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft48%
- Airline operations36%
- National airspace system12%
- Weather5%
Frequently asked questions
- How often are flights from IAH to MEM delayed?
- 25% of IAH–MEM flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 18 minutes.
- Which airline is most reliable from IAH to MEM?
- SkyWest Airlines has the best on-time record on this route at 80%, based on 967 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 (43%). 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 41m over 468 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are IAH to MEM flights cancelled?
- 1.2% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, 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 1,687 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.