Memphis (MEM) to Houston (IAH): On-Time Performance
Data through July 2026
Memphis (MEM) to Houston (IAH) effectively runs on two schedules. In September 2025, 94% of arrivals were on time; in June 2025 that fell to 63% — a 31-point seasonal swing. Across the full period the route averages 80% on-time against a national 78%.
- On-time
- 80%
- arrived <15 min late
- Avg delay
- 16 min
- completed flights
- Cancelled
- 1.4%
- Flights/day
- 3.0
- last 12 months
- Duration
- 1h 55m
- scheduled
- Distance
- 468 mi
Best airline from MEM to IAH
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 84% | 10 min | 1.7% | 752 |
| SkyWest Airlines | 76% | 20 min | 1.2% | 1,081 |
Monthly on-time trend
Best time to fly from MEM to IAH
Aim for departures around 7 a.m. (86% on-time); avoid 3 p.m. departures (70%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 82% | 19 min |
| Tuesdaybest | 85% | 13 min |
| Wednesday | 79% | 14 min |
| Thursday | 79% | 16 min |
| Friday | 75% | 16 min |
| Saturday | 78% | 16 min |
| Sunday | 79% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft27%
- Airline operations32%
- National airspace system30%
- Weather10%
Frequently asked questions
- How often are flights from MEM to IAH delayed?
- 20% of MEM–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 16 minutes.
- Which airline is most reliable from MEM to IAH?
- United Airlines has the best on-time record on this route at 84%, based on 752 flights. 2 airlines flew MEM–IAH frequently enough to compare in this period.
- What is the best time of day to fly from MEM to IAH?
- Departures around 7 a.m. have the best record (86% on-time), while departures around 3 p.m. have the worst (70%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from MEM to IAH?
- The scheduled MEM–IAH flight time averages 1h 55m over 468 miles. Actual arrival times vary — flights on this route land 15+ minutes late 20% of the time.
- How often are MEM to IAH flights cancelled?
- 1.4% 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 MEM to IAH?
- June 2025 was the roughest month in this dataset, with only 63% of arrivals on time. The best was September 2025 at 94%. If your dates are flexible, that 31-point gap is worth planning around.
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Based on 1,833 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.