Flight number record
UA 683
United Airlines · Washington to Tampa
- Route
- IAD → TPA
- Departs
- 09:00
- Flights
- 346
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 15 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 346 flights, with a median arrival 15 minutes early.
Set against the rest of the country, UA 683's record is 15 points better than the US average of 77.3%. That gap is worth roughly 146 fewer late arrivals for every thousand flights.
Key figures
On time
91.9%
Arrivals under 15 minutes late, of 344 completed flights
Avg delay
65 min
Across delayed arrivals only, not all flights
Cancelled
0.58%
National rate is 1.89%
1 hour+ late
2.3%
National rate is 8.3%
These figures cover 346 flights between September 2025 and August 2026. The median arrival is 15 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 683 flies
UA 683 flies IAD to TPA without a single fixed slot. Its most common scheduled departure was 09:00, used on 183 of 346 flights, with 08:35 (52 flights) next.
- Departs 09:00183 flights52.9%
- Departs 08:3552 flights15.0%
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 683 runs 8 points better at 91.9%. 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 683 next to IAD to TPA
Every carrier on IAD to TPA combined arrived on time 83.8% of the time across 1,287 flights, so UA 683 is 8 points ahead of it. United flew 1,109 flights on the same city pair under all its flight numbers, including this one, and those ran 83.6% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 683thin sample | 346 | 91.9% | 65 min | 0.58% | A+ |
| All United Airlines on IAD–TPA | 1,109 | 83.6% | 69 min | 0.45% | B+ |
| All carriers on IAD–TPA | 1,287 | 83.8% | 70 min | 0.78% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 683 quarter by quarter
Quarter by quarter UA 683 held fairly steady: 90.1% in Oct–Dec 2025, 91.0% in Jan–Mar 2026, 95.1% in Apr–Jun 2026 and 90.2% in Jul–Sep 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202522 flights—
- Oct–Dec 202591 flights90.1%
- Jan–Mar 202690 flights91.0%
- Apr–Jun 202681 flights95.1%
- Jul–Sep 202662 flights90.2%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, UA 683 did best on Wednesday at 100.0% on time and worst on Saturday at 86.5%. Each day rests on about 49 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 683 runs when it is late
UA 683 often beats the schedule: 174 of 344 completed flights, 51%, arrived 15 minutes or more early. The 28 late arrivals split 11 under half an hour, 9 between 30 and 60 minutes, and 8 an hour or more.
- 15+ min early174 flights50.6%
- Within 15 min142 flights41.3%
- 15–29 min late11 flights3.2%
- 30–59 min late9 flights2.6%
- 1–2 hours late3 flights0.9%
- 2+ hours late5 flights1.5%
Scale runs 0% to 100%.
Share of 344 completed flights by arrival against schedule.
Only 19 of 344 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for UA 683
The latest arrival of the period was on 19 March 2026, 4 hours 20 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across March, June, January and August, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 19 March 2026 | 4 hours 20 minutes | Late-arriving aircraft |
| 29 June 2026 | 3 hours 44 minutes | Late-arriving aircraft |
| 26 January 2026 | 3 hours 17 minutes | Extreme weather |
| 3 August 2026 | 2 hours 47 minutes | Carrier |
| 16 March 2026 | 2 hours 20 minutes | National Airspace System |
Delay causes
Why UA 683 runs late
National Airspace System accounts for 45% of the 1,808 delay minutes carriers reported here, and the remaining four split what is left.
- 45%National Airspace System
- 25%Late-arriving aircraft
- 21%Carrier
- 10%Extreme weather
45% 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 819 minutes out of 1,808, against a national NAS share of 21%. The split is drawn from 1,808 delay minutes reported on UA 683.
Cancellations are rare at 0.58%, 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 2.3% 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 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.
The same number turns up on seven other city pairs in the data, including TPA to DEN (141), 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. 346 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: 91.9% 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 route85.7%
- United Airlines 1140 on the same route72.8%
- 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.