IAH to TUS flight delays
Houston, TX (IAH) Tucson, AZ (TUS) · 937 miles
758 flights · July 2024 – July 2026 · US Bureau of Transportation Statistics
80.38%
Arrived on time
Within 15 minutes of schedule
2.37%
Cancelled
Share of scheduled flights
59 min
When late, late by
Average across delayed arrivals
13 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In January it ran 35.5 points more punctual than in July — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The two directions do not behave alike. TUS to IAH arrives on time 8.9 points more often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
The 2 airlines here are separated by under 3 points — close enough to call a tie. Choose on price and departure time.
The Houston to Tucson route sits close to the middle of the record — neither notably punctual nor notably late.
Which airline should you fly on this route?
Over July 2024 – July 2026, United Airlines arrived on time most often on IAH to TUS. SkyWest Airlines was late most often. Flights ran closest to schedule in January and worst in July.
Every airline on IAH to TUS
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| United Airlines | 514 | 81.23% | 1.56% | 48 min | C |
| SkyWest Airlines | 244 | 78.54% | 4.1% | 82 min | D |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
TUS to IAH Tucson back to Houston 89.26% on time AOther routes from Houston
Common questions
Are flights from Houston to Tucson usually delayed?
80.38% of flights on the IAH to TUS route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is better than the average route in this record.
Which airline is most on time from Houston to Tucson?
United Airlines, at 81.23% on time across 514 flights. The least punctual on the route was SkyWest Airlines at 78.54%.
How often are IAH to TUS flights cancelled?
2.37% of scheduled flights did not operate — about 24 in every thousand. That is in the normal range.
What is the best month to fly Houston to Tucson?
January, when 89.7% of flights arrived on time. The worst was July at 54.2%.
When IAH to TUS flights are late, how late are they?
About 59 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on IAH to TUS during July 2024 – July 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →