Flight number record
UA 2288
United Airlines · Raleigh to Denver
- Route
- RDU → DEN
- Departs
- 16:22
- Flights
- 331
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2288, check with United Airlines.
UA 2288 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 a little over an hour on average. That rests on 331 flights, with a median arrival 8 minutes early.
Set against the rest of the country, UA 2288's record is 5 points better than the US average of 77.3%. That gap is worth roughly 48 fewer late arrivals for every thousand flights.
Key figures
On time
82.1%
Arrivals under 15 minutes late, of 329 completed flights
Avg delay
82 min
Across delayed arrivals only, not all flights
Cancelled
0.30%
National rate is 1.89%
1 hour+ late
7.9%
National rate is 8.3%
These figures cover 331 flights between September 2025 and August 2026. The median arrival is 8 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 2288 flies
UA 2288 flies RDU to DEN without a single fixed slot. Its most common scheduled departure was 16:22, used on 81 of 331 flights, with 16:07 (37 flights) and 16:17 (36 flights) next.
- Departs 16:2281 flights24.5%
- Departs 16:0737 flights11.2%
- Departs 16:1736 flights10.9%
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 16:22 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and UA 2288 runs 10 points better at 82.1%. 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 2288 next to RDU to DEN
Every carrier on RDU to DEN combined arrived on time 81.9% of the time across 1,734 flights, so UA 2288 is about level with it. United flew 727 flights on the same city pair under all its flight numbers, including this one, and those ran 87.7% 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 2288thin sample | 331 | 82.1% | 82 min | 0.30% | B+ |
| All United Airlines on RDU–DEN | 727 | 87.7% | 89 min | 0.41% | A+ |
| All carriers on RDU–DEN | 1,734 | 81.9% | 68 min | 0.75% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 2288 quarter by quarter
UA 2288 did not run the same all year. Its best quarter was Oct–Dec 2025 at 87.9% on time and its weakest Jul–Sep 2026 at 65.0%, a swing of 23 points on roughly 66 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 flights87.9%
- Jan–Mar 202687 flights83.7%
- Apr–Jun 202662 flights85.5%
- Jul–Sep 202661 flights65.0%
Scale runs 55% to 95%.
By weekday, UA 2288 ranged from 76.6% on Thursday to 87.2% on Tuesday. With about 47 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late UA 2288 runs when it is late
UA 2288 often beats the schedule: 103 of 329 completed flights, 31%, arrived 15 minutes or more early. The 59 late arrivals split 15 under half an hour, 18 between 30 and 60 minutes, and 26 an hour or more.
- 15+ min early103 flights31.3%
- Within 15 min167 flights50.8%
- 15–29 min late15 flights4.6%
- 30–59 min late18 flights5.5%
- 1–2 hours late13 flights4.0%
- 2+ hours late13 flights4.0%
Scale runs 0% to 100%.
Share of 329 completed flights by arrival against schedule.
A late pushback is often recovered here: of 61 departures that left 15 minutes late or more, 19 still arrived on time. In the other direction, 17 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 DEN.
The worst days
Worst days for UA 2288
The latest arrival of the period was on 6 June 2026, 7 hours 26 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across June, December, January, February and August, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 6 June 2026 | 7 hours 26 minutes | Carrier |
| 19 December 2025 | 5 hours 8 minutes | Late-arriving aircraft |
| 30 January 2026 | 4 hours 44 minutes | Late-arriving aircraft |
| 17 February 2026 | 3 hours 21 minutes | National Airspace System |
| 12 August 2026 | 3 hours 21 minutes | Carrier |
Delay causes
Why UA 2288 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 4,832 reported delay minutes.
- 41%Late-arriving aircraft
- 40%National Airspace System
- 19%Carrier
- 0%Extreme weather
41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,832 reported delay minutes here, that single category outweighs weather by 41 to one. The split is drawn from 4,832 delay minutes reported on UA 2288.
Cancellations are rare at 0.30%, 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
7.9% 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 a little over an hour, which a normal layover absorbs.
The 1,436 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 two other city pairs in the data, including ORD to PHL (17) and IAD to CLE (1), but none flew often enough under UA 2288 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to RDU to DEN only.
One caution: this is a thin sample. 331 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 2288
For a booking, read UA 2288 as 82.1% on time with 0.30% cancelled over 331 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- RDU to DEN, every carrier and departure
- DEN to RDU, the return direction
- Frontier Airlines 2225 on the same route84.3%
- Raleigh-Durham International (RDU) delay statistics
- Denver International (DEN) 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.