Flight number record
UA 1312
United Airlines · Houston to Tampa
- Route
- IAH → TPA
- Departs
- 18:05
- Flights
- 278
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 1312, check with United Airlines.
UA 1312 lands a B+, 2 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 278 flights, with a median arrival 6 minutes early.
Key figures
On time
79.4%
Arrivals under 15 minutes late, of 277 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
0.36%
National rate is 1.81%
1 hour+ late
6.9%
National rate is 8.1%
These figures cover 278 flights between July 2025 and June 2026. The median arrival is 6 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
Schedule
When UA 1312 flies
UA 1312 flies IAH to TPA without a single fixed slot. Its most common scheduled departure was 18:05, used on 73 of 278 flights, with 18:15 (53 flights) and 18:40 (42 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 18:0573 flights26.3%
- Departs 18:1553 flights19.1%
- Departs 18:4042 flights15.1%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 18:05 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and UA 1312 runs 11 points better at 79.4%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Against the route
UA 1312 next to IAH to TPA
Every carrier on IAH to TPA combined arrived on time 81.6% of the time across 1,643 flights, so UA 1312 is 2 points behind it. United flew 1,363 flights on the same city pair under all its flight numbers, including this one, and those ran 83.6% on time. Across its whole network United Airlines managed 79.0%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1312thin sample | 278 | 79.4% | 61 min | 0.36% | B+ |
| All United Airlines on IAH–TPA | 1,363 | 83.6% | 66 min | 0.37% | B+ |
| All carriers on IAH–TPA | 1,643 | 81.6% | 73 min | 0.49% | B+ |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 1312 quarter by quarter
UA 1312 did not run the same all year. Its best quarter was Jul–Sep 2025 at 86.0% on time and its weakest Apr–Jun 2026 at 74.7%, a swing of 11 points on roughly 70 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 202543 flights86.0%
- Oct–Dec 202591 flights78.0%
- Jan–Mar 202653 flights84.6%
- Apr–Jun 202691 flights74.7%
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, UA 1312 did best on Monday at 84.6% on time and worst on Sunday at 70.0%. Each day rests on about 40 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Delay causes
Why UA 1312 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 49% of the 3,473 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 49%Late-arriving aircraft
- 24%Carrier
- 18%National Airspace System
- 10%Extreme weather
49% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 3,473 reported delay minutes here, that single category outweighs weather by 5 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 3,473 delay minutes reported on UA 1312.
Cancellations are rare at 0.36%, below the national 1.81% 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
6.9% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
The 787 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The same number turns up on five other city pairs in the data, including EGE to IAH (47), LAX to ORD (41) and DFW to IAH (32), but none flew often enough under UA 1312 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAH to TPA only.
One caution: this is a thin sample. 278 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 1312
For a booking, read UA 1312 as 79.4% on time with 0.36% cancelled over 278 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- IAH to TPA, every carrier and departure
- TPA to IAH, the return direction
- United Airlines 1501 on the same route75.4%
- George Bush Intercontinental (IAH) delay statistics
- Tampa International (TPA) 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.