Flight number record
UA 1370
United Airlines · Tampa to Washington
- Route
- TPA → IAD
- Departs
- 18:57
- Flights
- 350
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 1370, check with United Airlines.
UA 1370 sits in the middle of the pack with a C+. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 350 flights, with a median arrival 6 minutes early.
Key figures
On time
74.5%
Arrivals under 15 minutes late, of 349 completed flights
Avg delay
73 min
Across delayed arrivals only, not all flights
Cancelled
0.29%
National rate is 1.81%
1 hour+ late
11.5%
National rate is 8.1%
These figures cover 350 flights between July 2025 and June 2026. Beyond the headline rate, 11.5% 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 1370 flies
UA 1370 flies TPA to IAD without a single fixed slot. Its most common scheduled departure was 18:57, used on 57 of 350 flights, with 18:20 (49 flights) and 18:50 (48 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 18:5757 flights16.3%
- Departs 18:2049 flights14.0%
- Departs 18:5048 flights13.7%
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 18:57 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and UA 1370 runs 6 points better at 74.5%. 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 1370 next to TPA to IAD
Every carrier on TPA to IAD combined arrived on time 83.7% of the time across 1,368 flights, so UA 1370 is 9 points behind it. United flew 1,182 flights on the same city pair under all its flight numbers, including this one, and those ran 84.2% on time. Across its whole network United Airlines managed 79.0%, which this flight trails by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1370thin sample | 350 | 74.5% | 73 min | 0.29% | C+ |
| All United Airlines on TPA–IAD | 1,182 | 84.2% | 76 min | 0.59% | B+ |
| All carriers on TPA–IAD | 1,368 | 83.7% | 74 min | 1.02% | B |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 1370 quarter by quarter
UA 1370 did not run the same all year. Its best quarter was Oct–Dec 2025 at 82.4% on time and its weakest Jul–Sep 2025 at 65.2%, a swing of 17 points on roughly 88 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 flights65.2%
- Oct–Dec 202591 flights82.4%
- Jan–Mar 202681 flights75.0%
- Apr–Jun 202686 flights75.6%
Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, UA 1370 did best on Tuesday at 86.8% on time and worst on Sunday at 60.8%. Each day rests on about 50 flights, so a gap of 26 points is worth noticing but could still narrow in another year.
Delay causes
Why UA 1370 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 6,526 reported delay minutes.
- 36%Late-arriving aircraft
- 30%National Airspace System
- 24%Carrier
- 10%Extreme weather
36% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 6,526 reported delay minutes here, that single category outweighs weather by 4 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 6,526 delay minutes reported on UA 1370.
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. 11.5% 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 seven other city pairs in the data, including IAD to RDU (73), IAH to TPA (56) and IAD to CLE (48), but none flew often enough under UA 1370 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to TPA to IAD only.
One caution: this is a thin sample. 350 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 1370
For a booking, UA 1370 is one of the weaker ways to fly TPA to IAD: 9 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
- TPA to IAD, every carrier and departure
- IAD to TPA, the return direction
- United Airlines 2331 on the same route93.0%
- Tampa International (TPA) delay statistics
- Washington Dulles International (IAD) 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.