MEM to IAH flight delays & on-time performance
Nonstop flights from Frederick W. Smith International Airport to George Bush Intercontinental Airport · 468 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at MEM or IAH right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Memphis (MEM) to Houston (IAH) arrived on time 80% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1.1% were cancelled, and 7% arrived an hour or more late.
- United Airlines was the most punctual airline here (85% on time); SkyWest Airlines was the least (78%).
- Departures scheduled around 9am did best (90% on time); around 3pm did worst (71%).
- Tuesday was the most reliable day to fly (86% on time) and Friday the least (77%).
- The largest source of delay minutes was late-arriving aircraft (35%).
Which airline is most on time from MEM to IAH?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 85% | 1.6% | 8 min | 2.8% | 364 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 78% | 0.8% | 19 min | 8.5% | 722 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am83%207 flights
- 7am87%153 flights
- 9am90%67 flights
- 11am81%341 flights
- 3pm71%311 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday82%2.5% cancelled
- Tuesday86%0.6% cancelled
- Wednesday81%0.6% cancelled
- Thursday79%0.7% cancelled
- Friday77%0.0% cancelled
- Saturday78%1.3% cancelled
- Sunday78%2.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft35%
- Air traffic control & airport congestion29%
- Airline (crew, maintenance, cleaning, fueling)27%
- Extreme weather9%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather92%
- Airline (crew, maintenance, cleaning, fueling)8%
- Air traffic control & airport congestion0%
- Security0%
MEM to IAH: common questions
- How often are MEM to IAH flights on time?
- 80% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Memphis to Houston cancelled?
- 1.1% of scheduled flights were cancelled (12 of 1,086).
- How long are typical delays?
- Across all flights the average arrival delay was 16 min (early arrivals count as zero). Flights that were late arrived 73 min behind schedule on average, and 6.6% of flights were an hour or more late.
- How long is taxi time at MEM?
- Flights on this route spent 20 min taxiing from the gate to takeoff on average.
Related routes
Return trip: IAH to MEM — 80% on time
More flights from Memphis
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: MEM → IAH, nonstop flights by US airlines that report to the DOT. How we calculate this.