TUS to IAH flight delays & on-time performance
Nonstop flights from Tucson International Airport to George Bush Intercontinental Airport · 937 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at TUS or IAH right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Tucson (TUS) to Houston (IAH) arrived on time 92% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1.9% were cancelled, and 1% arrived an hour or more late.
- Departures scheduled around 7am did best (93% on time); around 6am did worst (93%).
- Wednesday was the most reliable day to fly (97% on time) and Monday the least (85%).
- The largest source of delay minutes was air traffic control & airport congestion (70%).
Which airline is most on time from TUS 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 |
|---|---|---|---|---|---|
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 100% | 0.0% | 0 min | 0.0% | 9 |
| United Airlines | 92% | 2.0% | 4 min | 1.0% | 197 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am93%110 flights
- 7am93%29 flights
- 1pm93%58 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday85%0.0% cancelled
- Tuesday96%3.7% cancelled
- Wednesday97%3.1% cancelled
- Thursday90%0.0% cancelled
- Friday93%0.0% cancelled
- Saturday94%0.0% cancelled
- Sunday88%7.7% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Air traffic control & airport congestion70%
- Airline (crew, maintenance, cleaning, fueling)27%
- Late-arriving aircraft3%
- Extreme weather0%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather100%
- Airline (crew, maintenance, cleaning, fueling)0%
- Air traffic control & airport congestion0%
- Security0%
TUS to IAH: common questions
- How often are TUS to IAH flights on time?
- 92% 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 Tucson to Houston cancelled?
- 1.9% of scheduled flights were cancelled (4 of 206).
- How long are typical delays?
- Across all flights the average arrival delay was 4 min (early arrivals count as zero). Flights that were late arrived 35 min behind schedule on average, and 1.0% of flights were an hour or more late.
- How long is taxi time at TUS?
- Flights on this route spent 13 min taxiing from the gate to takeoff on average.
Related routes
Return trip: IAH to TUS — 84% on time
More flights from Tucson
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: TUS → IAH, nonstop flights by US airlines that report to the DOT. How we calculate this.