Flight number record
UA 2078
United Airlines · Houston to Phoenix
- Route
- IAH → PHX
- Departs
- 19:53
- Flights
- 359
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2078, check with United Airlines.
UA 2078 sits in the middle of the pack with a C+. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 359 flights, with a median arrival 6 minutes early.
The national on-time rate over the same period is 77.3%, so UA 2078 runs 4 points behind the country as a whole. Across a thousand flights that is about 43 extra late arrivals.
Key figures
On time
73.0%
Arrivals under 15 minutes late, of 356 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
0.56%
National rate is 1.89%
1 hour+ late
11.5%
National rate is 8.3%
These figures cover 359 flights between September 2025 and August 2026. Beyond the headline rate, 11.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 2078 flies
UA 2078 flies IAH to PHX without a single fixed slot. Its most common scheduled departure was 19:53, used on 81 of 359 flights, with 20:10 (70 flights) and 20:35 (56 flights) next.
- Departs 19:5381 flights22.6%
- Departs 20:1070 flights19.5%
- Departs 20:3556 flights15.6%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 19:53 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and UA 2078 runs 5 points better at 73.0%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
UA 2078 next to IAH to PHX
Every carrier on IAH to PHX combined arrived on time 79.9% of the time across 2,980 flights, so UA 2078 is 7 points behind it. United flew 1,776 flights on the same city pair under all its flight numbers, including this one, and those ran 82.7% on time. Across its whole network United Airlines managed 78.8%, which this flight trails by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2078thin sample | 359 | 73.0% | 61 min | 0.56% | C+ |
| All United Airlines on IAH–PHX | 1,776 | 82.7% | 61 min | 0.23% | B+ |
| All carriers on IAH–PHX | 2,980 | 79.9% | 87 min | 0.74% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 2078 quarter by quarter
UA 2078 did not run the same all year. Its best quarter was Jan–Mar 2026 at 86.4% on time and its weakest Oct–Dec 2025 at 63.3%, a swing of 23 points on roughly 72 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights73.3%
- Oct–Dec 202590 flights63.3%
- Jan–Mar 202690 flights86.4%
- Apr–Jun 202688 flights63.6%
- Jul–Sep 202661 flights81.7%
Scale runs 55% to 90%.
By weekday, UA 2078 did best on Tuesday at 84.3% on time and worst on Sunday at 57.7%. Each day rests on about 51 flights, so a gap of 27 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 2078 runs when it is late
UA 2078 often beats the schedule: 103 of 356 completed flights, 29%, arrived 15 minutes or more early. The 96 late arrivals split 20 under half an hour, 35 between 30 and 60 minutes, and 41 an hour or more.
- 15+ min early103 flights28.9%
- Within 15 min157 flights44.1%
- 15–29 min late20 flights5.6%
- 30–59 min late35 flights9.8%
- 1–2 hours late34 flights9.6%
- 2+ hours late7 flights2.0%
Scale runs 0% to 100%.
Share of 356 completed flights by arrival against schedule.
15 of 101 late departures made up the time and arrived on time, 15% of them. 10 flights left on time and still arrived late.
The worst days
Worst days for UA 2078
The latest arrival of the period was on 7 March 2026, 5 hours 25 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across March, July, November and June, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 March 2026 | 5 hours 25 minutes | Extreme weather |
| 13 July 2026 | 3 hours 19 minutes | National Airspace System |
| 5 November 2025 | 3 hours 17 minutes | National Airspace System |
| 19 June 2026 | 3 hours 14 minutes | Carrier |
| 2 June 2026 | 2 hours 38 minutes | Late-arriving aircraft |
Delay causes
Why UA 2078 runs late
Late-arriving aircraft accounts for 42% of the 5,843 delay minutes carriers reported here, and the remaining four split what is left.
- 42%Late-arriving aircraft
- 30%Carrier
- 19%National Airspace System
- 9%Extreme weather
42% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,843 reported delay minutes here, that single category outweighs weather by 5 to one. The split is drawn from 5,843 delay minutes reported on UA 2078.
Cancellations are rare at 0.56%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
11.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 1,009 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The same number turns up on six other city pairs in the data, including SJC to IAH (123), PHX to EWR (123) and IND to IAH (69), but none flew often enough under UA 2078 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAH to PHX only.
One caution: this is a thin sample. 359 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking UA 2078
For a booking, UA 2078 is one of the weaker ways to fly IAH to PHX: 7 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
Related
Where to go next
- IAH to PHX, every carrier and departure
- PHX to IAH, the return direction
- United Airlines 1895 on the same route87.8%
- United Airlines 1798 on the same route86.1%
- George Bush Intercontinental (IAH) delay statistics
- Phoenix Sky Harbor International (PHX) delay statistics
- United Airlines on-time record
- Every United Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means United Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.