Flight number record
UA 1371
United Airlines · St. Louis to Houston
- Route
- STL → IAH
- Departs
- 06:00
- Flights
- 253
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1371, check with United Airlines.
UA 1371 lands a B+, 5 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by roughly 55 minutes on average. That rests on 253 flights, with a median arrival 14 minutes early.
Set against the rest of the country, UA 1371's record is 5 points better than the US average of 77.3%. That gap is worth roughly 52 fewer late arrivals for every thousand flights.
Key figures
On time
82.5%
Arrivals under 15 minutes late, of 251 completed flights
Avg delay
53 min
Across delayed arrivals only, not all flights
Cancelled
0.79%
National rate is 1.89%
1 hour+ late
3.6%
National rate is 8.3%
These figures cover 253 flights between September 2025 and August 2026. The median arrival is 14 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.
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Schedule
When UA 1371 flies
UA 1371 flies STL to IAH without a single fixed slot. Its most common scheduled departure was 06:00, used on 153 of 253 flights, with 06:15 (100 flights) next.
- Departs 06:00153 flights60.5%
- Departs 06:15100 flights39.5%
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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and UA 1371 runs 7 points worse at 82.5%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
UA 1371 next to STL to IAH
Every carrier on STL to IAH combined arrived on time 80.1% of the time across 411 flights, so UA 1371 is 2 points ahead of it. Across its whole network United Airlines managed 78.8%, which this flight beats by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1371thin sample | 253 | 82.5% | 53 min | 0.79% | B+ |
| All United Airlines on STL–IAHthin sample | 334 | 83.9% | 56 min | 1.20% | B |
| All carriers on STL–IAH | 411 | 80.1% | 60 min | 0.97% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1371 quarter by quarter
UA 1371 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Oct–Dec 2025 at 78.6%, a swing of 15 points on roughly 63 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 flights93.3%
- Oct–Dec 202584 flights78.6%
- Jan–Mar 202689 flights80.5%
- Apr–Jun 202650 flights86.0%
Scale runs 70% to 100%.
By weekday, UA 1371 did best on Tuesday at 94.7% on time and worst on Sunday at 72.2%. Each day rests on about 36 flights, so a gap of 23 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1371 runs when it is late
UA 1371 often beats the schedule: 121 of 251 completed flights, 48%, arrived 15 minutes or more early. Most of the lateness is short. 24 of the 44 late arrivals were under half an hour behind, and 9 reached an hour or more.
- 15+ min early121 flights48.2%
- Within 15 min86 flights34.3%
- 15–29 min late24 flights9.6%
- 30–59 min late11 flights4.4%
- 1–2 hours late3 flights1.2%
- 2+ hours late6 flights2.4%
Scale runs 0% to 100%.
Share of 251 completed flights by arrival against schedule.
7 of 35 late departures made up the time and arrived on time, 20% of them. In the other direction, 16 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at IAH.
The worst days
Worst days for UA 1371
The latest arrival of the period was on 15 December 2025, 6 hours 34 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 December 2025 | 6 hours 34 minutes | Late-arriving aircraft |
| 8 September 2025 | 2 hours 58 minutes | Carrier |
| 17 January 2026 | 2 hours 43 minutes | Carrier |
| 14 December 2025 | 2 hours 41 minutes | Carrier |
| 22 October 2025 | 2 hours 24 minutes | Carrier |
Delay causes
Why UA 1371 runs late
Carrier accounts for 62% of the 2,313 delay minutes carriers reported here, and the remaining four split what is left.
- 62%Carrier
- 20%National Airspace System
- 17%Late-arriving aircraft
- 1%Extreme weather
The largest share of delay minutes, 62%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,430 of the 2,313 delay minutes reported here. The split is drawn from 2,313 delay minutes reported on UA 1371.
Cancellations are rare at 0.79%, 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
Badly late arrivals are rare here: only 3.6% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 667 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 IAH to SAT (207), DEN to MRY (81) and CVG to ORD (21), but none flew often enough under UA 1371 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to STL to IAH only.
One caution: this is a thin sample. 253 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 1371
For a booking, read UA 1371 as 82.5% on time with 0.79% cancelled over 253 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- St. Louis Lambert International (STL) delay statistics
- George Bush Intercontinental (IAH) 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
- Worst months to fly in the US, ranked by the data
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.