Flight number record

UA 1140

United Airlines · Washington to Tampa

Route: IAD → TPA
Departs: 17:40
Flights: 348
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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, 7 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 348 flights, with a median arrival 1 minute early.

The national on-time rate over the same period is 77.6%, so UA 1140 runs 7 points behind the country as a whole. Across a thousand flights that is about 70 extra late arrivals.

On time

70.6%

Arrivals under 15 minutes late, of 347 completed flights

Avg delay

70 min

Across delayed arrivals only, not all flights

Cancelled

0.29%

National rate is 1.81%

1 hour+ late

11.0%

National rate is 8.1%

These figures cover 348 flights between July 2025 and June 2026. Beyond the headline rate, 11.0% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When UA 1140 flies

UA 1140 flies IAD to TPA without a single fixed slot. Its most common scheduled departure was 17:40, used on 49 of 348 flights, with 17:25 (39 flights) and 17:33 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:4049 flights14.1%
Departs 17:2539 flights11.2%
Departs 17:3337 flights10.6%

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 17:40 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and UA 1140 runs 2 points better at 70.6%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

UA 1140 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 1140 is 11 points behind 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 trails by 8 points.

UA 1140 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 1140thin sample	348	70.6%	70 min	0.29%	C+
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 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 55.4%, a swing of 26 points on roughly 87 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 202592 flights55.4%
Oct–Dec 202590 flights70.0%
Jan–Mar 202680 flights77.2%
Apr–Jun 202686 flights81.4%

Scale runs 45% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, UA 1140 did best on Tuesday at 81.1% on time and worst on Sunday at 60.8%. Each day rests on about 50 flights, so a gap of 20 points is worth noticing but could still narrow in another year.

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 7,144 reported delay minutes.

Late-arriving aircraft
39%
National Airspace System
29%
Carrier
16%
Extreme weather
16%

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 2.5 times the usual weather exposure. The split is drawn from 7,144 delay minutes reported on UA 1140.

Cancellations are rare at 0.29%, 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 11.0% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum 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. 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 five other city pairs in the data, including SFO to IAD (72), LAS to IAD (41) and SLC to IAD (37), 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.

Where to go next

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.

Key figures