Flight number record
UA 598
United Airlines · Denver to New York
- Route
- DEN → LGA
- Departs
- 11:30
- Flights
- 258
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 598, check with United Airlines.
UA 598 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 about an hour behind schedule. That rests on 258 flights, with a median arrival 2 minutes early.
The national on-time rate over the same period is 77.6%, so UA 598 runs 7 points behind the country as a whole. Across a thousand flights that is about 74 extra late arrivals.
Key figures
On time
70.2%
Arrivals under 15 minutes late, of 245 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
3.10%
National rate is 1.81%
1 hour+ late
10.6%
National rate is 8.1%
These figures cover 258 flights between July 2025 and June 2026. Beyond the headline rate, 10.6% 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 598 flies
UA 598 flies DEN to LGA without a single fixed slot. Its most common scheduled departure was 11:30, used on 80 of 258 flights, with 11:40 (57 flights) and 11:42 (42 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 11:3080 flights31.0%
- Departs 11:4057 flights22.1%
- Departs 11:4242 flights16.3%
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 11:30 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and UA 598 runs 9 points worse at 70.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
UA 598 next to DEN to LGA
Every carrier on DEN to LGA combined arrived on time 71.5% of the time across 4,672 flights, so UA 598 is about level with it. United flew 2,017 flights on the same city pair under all its flight numbers, including this one, and those ran 74.0% on time. Across its whole network United Airlines managed 79.0%, which this flight trails by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 598thin sample | 258 | 70.2% | 55 min | 3.10% | C− |
| All United Airlines on DEN–LGA | 2,017 | 74.0% | 69 min | 1.83% | C |
| All carriers on DEN–LGA | 4,672 | 71.5% | 68 min | 2.74% | C |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 598 quarter by quarter
UA 598 did not run the same all year. Its best quarter was Jul–Sep 2025 at 78.2% on time and its weakest Jan–Mar 2026 at 61.9%, a swing of 16 points on roughly 65 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 202559 flights78.2%
- Oct–Dec 202576 flights66.7%
- Jan–Mar 202645 flights61.9%
- Apr–Jun 202678 flights72.4%
Scale runs 55% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, UA 598 ranged from 65.1% on Sunday to 76.2% on Friday. With about 37 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Delay causes
Why UA 598 runs late
One category carries most of the weight here. National Airspace System accounts for 72% of the 4,026 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 72%National Airspace System
- 14%Late-arriving aircraft
- 13%Carrier
- 1%Extreme weather
72% 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 2,888 minutes out of 4,026, against a national NAS share of 21%. The split is drawn from 4,026 delay minutes reported on UA 598.
Cancellations run at 3.10%, against 1.81% nationally. That is about one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
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. 10.6% 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.
At 1,620 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The same number turns up on eleven other city pairs in the data, including LGA to ORD (94), BDL to DEN (37) and EWR to SAV (23), but none flew often enough under UA 598 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to LGA only.
One caution: this is a thin sample. 258 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 598
For a booking, the cancellation rate is the figure to plan around on UA 598: 3.10% of its 258 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- DEN to LGA, every carrier and departure
- LGA to DEN, the return direction
- Delta Air Lines 751 on the same route79.5%
- United Airlines 1579 on the same route72.7%
- United Airlines 2446 on the same route81.5%
- Delta Air Lines 716 on the same route67.2%
- United Airlines 2168 on the same route68.4%
- Delta Air Lines 398 on the same route88.1%
- Denver International (DEN) delay statistics
- LaGuardia (LGA) 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
- What a cancellation rate actually tells you (and what it hides)
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.