Flight number record
UA 2188
United Airlines · Denver to Fort Lauderdale
- Route
- DEN → FLL
- Departs
- 09:47
- Flights
- 319
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2188, check with United Airlines.
UA 2188 lands a B+, 4 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 319 flights, with a median arrival 4 minutes early.
Set against the rest of the country, UA 2188's record is 4 points better than the US average of 77.3%. That gap is worth roughly 40 fewer late arrivals for every thousand flights.
Key figures
On time
81.3%
Arrivals under 15 minutes late, of 316 completed flights
Avg delay
57 min
Across delayed arrivals only, not all flights
Cancelled
0.31%
National rate is 1.89%
1 hour+ late
5.4%
National rate is 8.3%
These figures cover 319 flights between September 2025 and August 2026. The median arrival is 4 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 2188 flies
UA 2188 flies DEN to FLL without a single fixed slot. Its most common scheduled departure was 09:47, used on 82 of 319 flights, with 09:51 (36 flights) and 09:35 (34 flights) next.
- Departs 09:4782 flights25.7%
- Departs 09:5136 flights11.3%
- Departs 09:3534 flights10.7%
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 09:47 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and UA 2188 runs 3 points worse at 81.3%. 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 2188 next to DEN to FLL
Every carrier on DEN to FLL combined arrived on time 76.6% of the time across 1,578 flights, so UA 2188 is 5 points ahead of it. United flew 1,173 flights on the same city pair under all its flight numbers, including this one, and those ran 81.0% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2188thin sample | 319 | 81.3% | 57 min | 0.31% | B+ |
| All United Airlines on DEN–FLL | 1,173 | 81.0% | 58 min | 0.26% | B+ |
| All carriers on DEN–FLL | 1,578 | 76.6% | 59 min | 0.38% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 2188 quarter by quarter
UA 2188 did not run the same all year. Its best quarter was Oct–Dec 2025 at 87.0% on time and its weakest Jul–Sep 2026 at 56.1%, a swing of 31 points on roughly 80 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 20256 flights—
- Oct–Dec 202592 flights87.0%
- Jan–Mar 202689 flights83.7%
- Apr–Jun 202691 flights84.6%
- Jul–Sep 202641 flights56.1%
Scale runs 50% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, UA 2188 did best on Monday at 88.9% on time and worst on Friday at 68.9%. Each day rests on about 46 flights, so a gap of 20 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 2188 runs when it is late
The 59 late arrivals split 24 under half an hour, 18 between 30 and 60 minutes, and 17 an hour or more.
- 15+ min early75 flights23.7%
- Within 15 min182 flights57.6%
- 15–29 min late24 flights7.6%
- 30–59 min late18 flights5.7%
- 1–2 hours late9 flights2.8%
- 2+ hours late8 flights2.5%
Scale runs 0% to 100%.
Share of 316 completed flights by arrival against schedule.
7 of 46 late departures made up the time and arrived on time, 15% of them. In the other direction, 20 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 FLL.
The worst days
Worst days for UA 2188
The latest arrival of the period was on 20 July 2026, 4 hours 34 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 20 July 2026 | 4 hours 34 minutes | Carrier |
| 17 April 2026 | 3 hours 42 minutes | Late-arriving aircraft |
| 18 July 2026 | 3 hours 13 minutes | Late-arriving aircraft |
| 17 January 2026 | 3 hours 2 minutes | Carrier |
| 2 August 2026 | 2 hours 28 minutes | Carrier |
Delay causes
Why UA 2188 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 3,385 reported delay minutes.
- 40%Carrier
- 31%National Airspace System
- 29%Late-arriving aircraft
The largest share of delay minutes, 40%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,354 of the 3,385 delay minutes reported here. The split is drawn from 3,385 delay minutes reported on UA 2188.
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
5.4% 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.
At 1,703 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The same number turns up on two other city pairs in the data, including DEN to TPA (24) and ORD to PHL (21), but none flew often enough under UA 2188 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to FLL only.
One caution: this is a thin sample. 319 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 2188
For a booking, read UA 2188 as 81.3% on time with 0.31% cancelled over 319 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DEN to FLL, every carrier and departure
- FLL to DEN, the return direction
- United Airlines 1374 on the same route78.3%
- Denver International (DEN) delay statistics
- Fort Lauderdale-Hollywood International (FLL) 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.