Flight number record
UA 2084
United Airlines · Washington to Jacksonville
- Route
- IAD → JAX
- Departs
- 09:00
- Flights
- 257
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2084, check with United Airlines.
UA 2084 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 13 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 257 flights, with a median arrival 16 minutes early.
Set against the rest of the country, UA 2084's record is 13 points better than the US average of 77.3%. That gap is worth roughly 125 fewer late arrivals for every thousand flights.
Key figures
On time
89.8%
Arrivals under 15 minutes late, of 255 completed flights
Avg delay
59 min
Across delayed arrivals only, not all flights
Cancelled
0.78%
National rate is 1.89%
1 hour+ late
2.4%
National rate is 8.3%
These figures cover 257 flights between September 2025 and August 2026. The median arrival is 16 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 2084 flies
UA 2084 flies IAD to JAX without a single fixed slot. Its most common scheduled departure was 09:00, used on 64 of 257 flights, with 08:45 (52 flights) and 08:32 (48 flights) next.
- Departs 09:0064 flights24.9%
- Departs 08:4552 flights20.2%
- Departs 08:3248 flights18.7%
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 09:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and UA 2084 runs 6 points better at 89.8%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
UA 2084 next to IAD to JAX
Every carrier on IAD to JAX combined arrived on time 82.5% of the time across 760 flights, so UA 2084 is 7 points ahead of it. United flew 643 flights on the same city pair under all its flight numbers, including this one, and those ran 83.8% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2084thin sample | 257 | 89.8% | 59 min | 0.78% | A+ |
| All United Airlines on IAD–JAX | 643 | 83.8% | 80 min | 0.78% | B+ |
| All carriers on IAD–JAX | 760 | 82.5% | 84 min | 0.79% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 2084 quarter by quarter
Quarter by quarter UA 2084 held fairly steady: 94.4% in Oct–Dec 2025, 90.5% in Jan–Mar 2026, 88.2% in Apr–Jun 2026 and 88.6% in Jul–Sep 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202527 flights—
- Oct–Dec 202536 flights94.4%
- Jan–Mar 202665 flights90.5%
- Apr–Jun 202685 flights88.2%
- Jul–Sep 202644 flights88.6%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, UA 2084 ranged from 86.4% on Friday to 93.5% on Tuesday. With about 37 flights behind each day, a spread of 7 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late UA 2084 runs when it is late
UA 2084 often beats the schedule: 135 of 255 completed flights, 53%, arrived 15 minutes or more early. The 26 late arrivals split 12 under half an hour, 8 between 30 and 60 minutes, and 6 an hour or more.
- 15+ min early135 flights52.9%
- Within 15 min94 flights36.9%
- 15–29 min late12 flights4.7%
- 30–59 min late8 flights3.1%
- 1–2 hours late3 flights1.2%
- 2+ hours late3 flights1.2%
Scale runs 0% to 100%.
Share of 255 completed flights by arrival against schedule.
6 of 21 late departures made up the time and arrived on time, 29% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for UA 2084
The latest arrival of the period was on 8 August 2026, 4 hours 27 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 8 August 2026 | 4 hours 27 minutes | Carrier |
| 30 March 2026 | 3 hours 57 minutes | Late-arriving aircraft |
| 17 May 2026 | 2 hours 45 minutes | Late-arriving aircraft |
| 13 February 2026 | 1 hour 44 minutes | Carrier |
| 9 April 2026 | 1 hour 42 minutes | Late-arriving aircraft |
Delay causes
Why UA 2084 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 1,536 reported delay minutes.
- 41%Late-arriving aircraft
- 36%Carrier
- 20%National Airspace System
- 3%Extreme weather
41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 1,536 reported delay minutes here, that single category outweighs weather by 14 to one. The split is drawn from 1,536 delay minutes reported on UA 2084.
Cancellations are rare at 0.78%, 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 2.4% 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 631 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 six other city pairs in the data, including JAX to IAH (67), ORD to IAH (19) and SAT to IAH (7), but none flew often enough under UA 2084 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAD to JAX only.
One caution: this is a thin sample. 257 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 2084
For a booking, UA 2084 has one of the better records a US domestic flight can show: 89.8% on time and 0.78% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- IAD to JAX, every carrier and departure
- JAX to IAD, the return direction
- Washington Dulles International (IAD) delay statistics
- Jacksonville International (JAX) 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.