Flight number record
UA 1370
United Airlines · Tampa to Washington
- Route
- TPA → IAD
- Departs
- 18:57
- Flights
- 350
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1370, check with United Airlines.
UA 1370 lands a B+, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 350 flights, with a median arrival 7 minutes early.
Key figures
On time
77.3%
Arrivals under 15 minutes late, of 348 completed flights
Avg delay
68 min
Across delayed arrivals only, not all flights
Cancelled
0.57%
National rate is 1.89%
1 hour+ late
10.3%
National rate is 8.3%
These figures cover 350 flights between September 2025 and August 2026. Beyond the headline rate, 10.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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 97 of 350 flights, with 18:50 (48 flights) next.
- Departs 18:5797 flights27.7%
- Departs 18:5048 flights13.7%
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 18:57 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and UA 1370 runs 9 points better at 77.3%. 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 1370 next to TPA to IAD
Every carrier on TPA to IAD combined arrived on time 85.8% of the time across 1,288 flights, so UA 1370 is 9 points behind it. United flew 1,110 flights on the same city pair under all its flight numbers, including this one, and those ran 85.6% on time. Across its whole network United Airlines managed 78.8%, which this flight trails by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1370thin sample | 350 | 77.3% | 68 min | 0.57% | B+ |
| All United Airlines on TPA–IAD | 1,110 | 85.6% | 72 min | 0.72% | A+ |
| All carriers on TPA–IAD | 1,288 | 85.8% | 72 min | 1.01% | A |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1370 quarter by quarter
UA 1370 did not run the same all year. Its best quarter was Jul–Sep 2025 at 86.7% on time and its weakest Jul–Sep 2026 at 70.5%, a swing of 16 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 flights86.7%
- Oct–Dec 202591 flights82.4%
- Jan–Mar 202681 flights75.0%
- Apr–Jun 202686 flights75.6%
- Jul–Sep 202662 flights70.5%
Scale runs 60% to 90%.
By weekday, UA 1370 did best on Tuesday at 92.2% on time and worst on Sunday at 60.8%. Each day rests on about 50 flights, so a gap of 31 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1370 runs when it is late
UA 1370 often beats the schedule: 95 of 348 completed flights, 27%, arrived 15 minutes or more early. The 79 late arrivals split 21 under half an hour, 22 between 30 and 60 minutes, and 36 an hour or more.
- 15+ min early95 flights27.3%
- Within 15 min174 flights50.0%
- 15–29 min late21 flights6.0%
- 30–59 min late22 flights6.3%
- 1–2 hours late26 flights7.5%
- 2+ hours late10 flights2.9%
Scale runs 0% to 100%.
Share of 348 completed flights by arrival against schedule.
11 of 68 late departures made up the time and arrived on time, 16% of them. In the other direction, 22 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 IAD.
The worst days
Worst days for UA 1370
The latest arrival of the period was on 19 June 2026, 4 hours 10 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as national airspace system delay.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 19 June 2026 | 4 hours 10 minutes | Late-arriving aircraft |
| 18 July 2026 | 3 hours 33 minutes | National Airspace System |
| 8 November 2025 | 3 hours 26 minutes | National Airspace System |
| 22 June 2026 | 3 hours 21 minutes | National Airspace System |
| 27 December 2025 | 2 hours 46 minutes | Late-arriving aircraft |
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 5,402 reported delay minutes.
- 41%National Airspace System
- 32%Late-arriving aircraft
- 21%Carrier
- 7%Extreme weather
41% 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 2,190 minutes out of 5,402, against a national NAS share of 21%. The split is drawn from 5,402 delay minutes reported on UA 1370.
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
10.3% 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 six other city pairs in the data, including IAD to RDU (73), IAH to TPA (56) and SFO to TPA (27), 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 route93.6%
- 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.