Flight number record
UA 1312
United Airlines · Houston to Tampa
- Route
- IAH → TPA
- Departs
- 18:10
- Flights
- 323
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1312, check with United Airlines.
UA 1312 lands a B+, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 323 flights, with a median arrival 6 minutes early.
Key figures
On time
77.3%
Arrivals under 15 minutes late, of 322 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
0.31%
National rate is 1.89%
1 hour+ late
8.1%
National rate is 8.3%
These figures cover 323 flights between September 2025 and August 2026. Beyond the headline rate, 8.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 1312 flies
UA 1312 flies IAH to TPA without a single fixed slot. Its most common scheduled departure was 18:10, used on 76 of 323 flights, with 18:05 (60 flights) and 18:15 (53 flights) next.
- Departs 18:1076 flights23.5%
- Departs 18:0560 flights18.6%
- Departs 18:1553 flights16.4%
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 18:10 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and UA 1312 runs 9 points better at 77.3%. 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 1312 next to IAH to TPA
Every carrier on IAH to TPA combined arrived on time 82.7% of the time across 1,522 flights, so UA 1312 is 5 points behind it. United flew 1,336 flights on the same city pair under all its flight numbers, including this one, and those ran 83.5% on time. Across its whole network United Airlines managed 78.8%, which this flight trails by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1312thin sample | 323 | 77.3% | 61 min | 0.31% | B+ |
| All United Airlines on IAH–TPA | 1,336 | 83.5% | 60 min | 0.30% | B+ |
| All carriers on IAH–TPA | 1,522 | 82.7% | 68 min | 0.46% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | 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 86.7% on time and its weakest Jul–Sep 2026 at 69.0%, a swing of 18 points on roughly 65 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 flights86.7%
- Oct–Dec 202591 flights78.0%
- Jan–Mar 202653 flights84.6%
- Apr–Jun 202691 flights74.7%
- Jul–Sep 202658 flights69.0%
Scale runs 60% to 90%.
By weekday, UA 1312 did best on Wednesday at 86.7% on time and worst on Sunday at 66.0%. Each day rests on about 46 flights, so a gap of 21 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1312 runs when it is late
UA 1312 often beats the schedule: 83 of 322 completed flights, 26%, arrived 15 minutes or more early. The 73 late arrivals split 30 under half an hour, 17 between 30 and 60 minutes, and 26 an hour or more.
- 15+ min early83 flights25.8%
- Within 15 min166 flights51.6%
- 15–29 min late30 flights9.3%
- 30–59 min late17 flights5.3%
- 1–2 hours late16 flights5.0%
- 2+ hours late10 flights3.1%
Scale runs 0% to 100%.
Share of 322 completed flights by arrival against schedule.
12 of 77 late departures made up the time and arrived on time, 16% of them. 8 flights left on time and still arrived late.
The worst days
Worst days for UA 1312
The latest arrival of the period was on 7 March 2026, 5 hours 40 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 March 2026 | 5 hours 40 minutes | Late-arriving aircraft |
| 24 November 2025 | 3 hours 55 minutes | Late-arriving aircraft |
| 28 July 2026 | 2 hours 52 minutes | Carrier |
| 1 May 2026 | 2 hours 51 minutes | Late-arriving aircraft |
| 15 March 2026 | 2 hours 50 minutes | National Airspace System |
Delay causes
Why UA 1312 runs late
Late-arriving aircraft accounts for 48% of the 4,443 delay minutes carriers reported here, and the remaining four split what is left.
- 48%Late-arriving aircraft
- 30%Carrier
- 14%National Airspace System
- 8%Extreme weather
48% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,443 reported delay minutes here, that single category outweighs weather by 6 to one. The split is drawn from 4,443 delay minutes reported on UA 1312.
Cancellations are rare at 0.31%, 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
8.1% of arrivals land an hour or more late, close to the national 8.3%, so 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.
The same number turns up on four other city pairs in the data, including EGE to IAH (47), DFW to IAH (21) and SFO to DEN (3), 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. 323 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, UA 1312 is one of the weaker ways to fly IAH to TPA: 5 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 TPA, every carrier and departure
- TPA to IAH, the return direction
- United Airlines 1501 on the same route74.2%
- 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.