Flight number record
UA 683
United Airlines · Washington to Tampa
- Route
- IAD → TPA
- Departs
- 09:00
- Flights
- 342
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 683, check with United Airlines.
UA 683 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 77.6%. When something does go wrong the average delay runs about an hour. That rests on 342 flights, with a median arrival 13 minutes early.
Set against the rest of the country, UA 683's record is 13 points better than the US average of 77.6%. That gap is worth roughly 130 fewer late arrivals for every thousand flights.
Key figures
On time
90.6%
Arrivals under 15 minutes late, of 340 completed flights
Avg delay
60 min
Across delayed arrivals only, not all flights
Cancelled
0.58%
National rate is 1.81%
1 hour+ late
2.9%
National rate is 8.1%
These figures cover 342 flights between July 2025 and June 2026. The median arrival is 13 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.
Schedule
When UA 683 flies
UA 683 flies IAD to TPA without a single fixed slot. Its most common scheduled departure was 09:00, used on 121 of 342 flights, with 08:40 (74 flights) and 08:35 (52 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 09:00121 flights35.4%
- Departs 08:4074 flights21.6%
- Departs 08:3552 flights15.2%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
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 84.1%, and UA 683 runs 7 points better at 90.6%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Against the route
UA 683 next to IAD to TPA
Every carrier on IAD to TPA combined arrived on time 81.2% of the time across 1,366 flights, so UA 683 is 9 points ahead of it. United flew 1,180 flights on the same city pair under all its flight numbers, including this one, and those ran 82.2% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 12 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 683thin sample | 342 | 90.6% | 60 min | 0.58% | A+ |
| All United Airlines on IAD–TPA | 1,180 | 82.2% | 67 min | 0.42% | B+ |
| All carriers on IAD–TPA | 1,366 | 81.2% | 69 min | 0.88% | B+ |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 683 quarter by quarter
Quarter by quarter UA 683 held fairly steady: 86.1% in Jul–Sep 2025, 90.1% in Oct–Dec 2025, 91.0% in Jan–Mar 2026 and 95.1% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202580 flights86.1%
- Oct–Dec 202591 flights90.1%
- Jan–Mar 202690 flights91.0%
- Apr–Jun 202681 flights95.1%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, UA 683 did best on Wednesday at 97.6% on time and worst on Saturday at 84.6%. Each day rests on about 49 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Delay causes
Why UA 683 runs late
One category carries most of the weight here. National Airspace System accounts for 44% of the 1,925 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 44%National Airspace System
- 28%Late-arriving aircraft
- 19%Carrier
- 9%Extreme weather
44% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 839 minutes out of 1,925, against a national NAS share of 21%. The split is drawn from 1,925 delay minutes reported on UA 683.
Cancellations are rare at 0.58%, below the national 1.81% 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 2.9% land an hour or more behind schedule, against 8.1% 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 811 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The same number turns up on eight other city pairs in the data, including TPA to DEN (120), TPA to IAH (45) and DEN to SNA (36), but none flew often enough under UA 683 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to IAD to TPA only.
One caution: this is a thin sample. 342 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 683
For a booking, UA 683 has one of the better records a US domestic flight can show: 90.6% on time and 0.58% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- IAD to TPA, every carrier and departure
- TPA to IAD, the return direction
- United Airlines 2277 on the same route87.1%
- United Airlines 1140 on the same route70.6%
- Washington Dulles International (IAD) delay statistics
- Tampa International (TPA) 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.