Flight number record
UA 1140
United Airlines · Washington to Tampa
- Route
- IAD → TPA
- Departs
- 18:00
- Flights
- 348
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1140, check with United Airlines.
UA 1140 sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 348 flights, with a median arrival 3 minutes early.
The national on-time rate over the same period is 77.3%, so UA 1140 runs 5 points behind the country as a whole. Across a thousand flights that is about 45 extra late arrivals.
Key figures
On time
72.8%
Arrivals under 15 minutes late, of 346 completed flights
Avg delay
74 min
Across delayed arrivals only, not all flights
Cancelled
0.57%
National rate is 1.89%
1 hour+ late
11.6%
National rate is 8.3%
These figures cover 348 flights between September 2025 and August 2026. Beyond the headline rate, 11.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 1140 flies
UA 1140 flies IAD to TPA without a single fixed slot. Its most common scheduled departure was 18:00, used on 70 of 348 flights, with 17:33 (37 flights) and 17:35 (35 flights) next.
- Departs 18:0070 flights20.1%
- Departs 17:3337 flights10.6%
- Departs 17:3535 flights10.1%
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 18:00 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and UA 1140 runs 5 points better at 72.8%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
UA 1140 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 1140 is 11 points behind 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 trails by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1140thin sample | 348 | 72.8% | 74 min | 0.57% | C+ |
| 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 1140 quarter by quarter
UA 1140 did not run the same all year. Its best quarter was Apr–Jun 2026 at 81.4% on time and its weakest Jul–Sep 2025 at 53.3%, a swing of 28 points on roughly 70 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 flights53.3%
- Oct–Dec 202590 flights70.0%
- Jan–Mar 202680 flights77.2%
- Apr–Jun 202686 flights81.4%
- Jul–Sep 202662 flights68.9%
Scale runs 45% to 85%.
By weekday, UA 1140 did best on Tuesday at 82.4% on time and worst on Friday at 61.5%. Each day rests on about 50 flights, so a gap of 21 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1140 runs when it is late
UA 1140 often beats the schedule: 95 of 346 completed flights, 27%, arrived 15 minutes or more early. The 94 late arrivals split 28 under half an hour, 26 between 30 and 60 minutes, and 40 an hour or more.
- 15+ min early95 flights27.5%
- Within 15 min157 flights45.4%
- 15–29 min late28 flights8.1%
- 30–59 min late26 flights7.5%
- 1–2 hours late27 flights7.8%
- 2+ hours late13 flights3.8%
Scale runs 0% to 100%.
Share of 346 completed flights by arrival against schedule.
23 of 81 late departures made up the time and arrived on time, 28% of them. In the other direction, 36 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 TPA.
The worst days
Worst days for UA 1140
The latest arrival of the period was on 8 August 2026, 6 hours 43 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 8 August 2026 | 6 hours 43 minutes | Late-arriving aircraft |
| 20 May 2026 | 6 hours 27 minutes | Extreme weather |
| 11 June 2026 | 4 hours 32 minutes | Extreme weather |
| 13 March 2026 | 4 hours 2 minutes | Late-arriving aircraft |
| 6 March 2026 | 3 hours 54 minutes | Late-arriving aircraft |
Delay causes
Why UA 1140 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 6,920 reported delay minutes.
- 34%Late-arriving aircraft
- 31%National Airspace System
- 19%Carrier
- 16%Extreme weather
Extreme weather accounts for 16% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.6 times the usual weather exposure. The split is drawn from 6,920 delay minutes reported on UA 1140.
Cancellations are rare at 0.57%, 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
11.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
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 four other city pairs in the data, including LAS to IAD (103), SFO to IAD (72) and SLC to IAD (24), but none flew often enough under UA 1140 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. 348 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 1140
For a booking, UA 1140 is one of the weaker ways to fly IAD to TPA: 11 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
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 683 on the same route91.9%
- 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
- 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.