Flight number record
UA 1388
United Airlines · Houston to Dallas-Fort Worth
- Route
- IAH → DFW
- Departs
- 14:35
- Flights
- 334
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1388, check with United Airlines.
UA 1388 lands a B, about a point worse than the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 334 flights, with a median arrival 5 minutes early.
Key figures
On time
76.1%
Arrivals under 15 minutes late, of 327 completed flights
Avg delay
95 min
Across delayed arrivals only, not all flights
Cancelled
2.10%
National rate is 1.89%
1 hour+ late
11.9%
National rate is 8.3%
These figures cover 334 flights between September 2025 and August 2026. Beyond the headline rate, 11.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 1388 flies
UA 1388 flies IAH to DFW without a single fixed slot. Its most common scheduled departure was 14:35, used on 131 of 334 flights, with 14:40 (57 flights) next.
- Departs 14:35131 flights39.2%
- Departs 14:4057 flights17.1%
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 14:35 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and UA 1388 runs 4 points better at 76.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
UA 1388 next to IAH to DFW
Every carrier on IAH to DFW combined arrived on time 76.4% of the time across 5,800 flights, so UA 1388 is about level with it. United flew 2,459 flights on the same city pair under all its flight numbers, including this one, and those ran 76.8% on time. Across its whole network United Airlines managed 78.8%, which this flight trails by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1388thin sample | 334 | 76.1% | 95 min | 2.10% | B |
| All United Airlines on IAH–DFW | 2,459 | 76.8% | 72 min | 1.42% | B |
| All carriers on IAH–DFW | 5,800 | 76.4% | 98 min | 2.34% | B |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1388 quarter by quarter
UA 1388 did not run the same all year. Its best quarter was Jan–Mar 2026 at 88.1% on time and its weakest Apr–Jun 2026 at 66.7%, a swing of 21 points on roughly 84 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 202527 flights—
- Oct–Dec 202584 flights80.5%
- Jan–Mar 202688 flights88.1%
- Apr–Jun 202679 flights66.7%
- Jul–Sep 202656 flights69.6%
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, UA 1388 did best on Saturday at 84.6% on time and worst on Friday at 66.0%. Each day rests on about 48 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1388 runs when it is late
The 78 late arrivals split 29 under half an hour, 10 between 30 and 60 minutes, and 39 an hour or more.
- 15+ min early48 flights14.7%
- Within 15 min201 flights61.5%
- 15–29 min late29 flights8.9%
- 30–59 min late10 flights3.1%
- 1–2 hours late17 flights5.2%
- 2+ hours late22 flights6.7%
Scale runs 0% to 100%.
Share of 327 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 71 departures that left 15 minutes late or more, only 8 made it up before arrival. 15 flights left on time and still arrived late.
The worst days
Worst days for UA 1388
The latest arrival of the period was on 24 November 2025, 7 hours 39 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as national airspace system delay.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 24 November 2025 | 7 hours 39 minutes | Late-arriving aircraft |
| 14 May 2026 | 6 hours 12 minutes | Late-arriving aircraft |
| 2 June 2026 | 6 hours 6 minutes | National Airspace System |
| 25 May 2026 | 5 hours 37 minutes | National Airspace System |
| 20 November 2025 | 5 hours 19 minutes | National Airspace System |
Delay causes
Why UA 1388 runs late
National Airspace System accounts for 43% of the 7,402 delay minutes carriers reported here, and the remaining four split what is left.
- 43%National Airspace System
- 38%Late-arriving aircraft
- 16%Carrier
- 3%Extreme weather
38% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 7,402 reported delay minutes here, that single category outweighs weather by 12 to one. The split is drawn from 7,402 delay minutes reported on UA 1388.
Cancellations sit at 2.10% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
11.9% 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 same number turns up on six other city pairs in the data, including RSW to IAH (51), BUR to SFO (7) and EGE to ORD (6), but none flew often enough under UA 1388 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAH to DFW only.
One caution: this is a thin sample. 334 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 1388
For a booking, read UA 1388 as 76.1% on time with 2.10% cancelled over 334 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- IAH to DFW, every carrier and departure
- DFW to IAH, the return direction
- American Airlines 2551 on the same route90.0%
- United Airlines 1949 on the same route69.9%
- George Bush Intercontinental (IAH) delay statistics
- Dallas/Fort Worth International (DFW) 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.