Flight number record
YX 4598
Republic Airways · New York to Detroit
- Route
- LGA → DTW
- Departs
- 20:29
- Flights
- 308
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s YX 4598, check with Republic Airways. Republic Airways flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.
YX 4598 draws a C−. About one flight in three arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 308 flights, with a median arrival 5 minutes early.
The national on-time rate over the same period is 77.6%, so YX 4598 runs 10 points behind the country as a whole. Across a thousand flights that is about 97 extra late arrivals.
Key figures
On time
67.9%
Arrivals under 15 minutes late, of 277 completed flights
Avg delay
77 min
Across delayed arrivals only, not all flights
Cancelled
10.06%
National rate is 1.81%
1 hour+ late
14.8%
National rate is 8.1%
These figures cover 308 flights between July 2025 and June 2026. Beyond the headline rate, 14.8% 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 YX 4598 flies
YX 4598 flies LGA to DTW without a single fixed slot. Its most common scheduled departure was 20:29, used on 140 of 308 flights, with 19:59 (52 flights) and 19:45 (48 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 20:29140 flights45.5%
- Departs 19:5952 flights16.9%
- Departs 19:4548 flights15.6%
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 20:29 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and YX 4598 runs 3 points worse at 67.9%. 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
YX 4598 next to LGA to DTW
Every carrier on LGA to DTW combined arrived on time 78.0% of the time across 4,011 flights, so YX 4598 is 10 points behind it. Republic flew 1,033 flights on the same city pair under all its flight numbers, including this one, and those ran 74.9% on time. Across its whole network Republic Airways managed 78.5%, which this flight trails by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 4598thin sample | 308 | 67.9% | 77 min | 10.06% | C− |
| All Republic Airways on LGA–DTW | 1,033 | 74.9% | 71 min | 5.23% | C− |
| All carriers on LGA–DTW | 4,011 | 78.0% | 82 min | 4.94% | B− |
| Republic Airways, whole network | 361,482 | 78.5% | 72 min | 4.08% | B− |
Across the year
YX 4598 quarter by quarter
YX 4598 did not run the same all year. Its best quarter was Jul–Sep 2025 at 81.2% on time and its weakest Jan–Mar 2026 at 60.3%, a swing of 21 points on roughly 77 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 202583 flights81.2%
- Oct–Dec 202574 flights67.6%
- Jan–Mar 202673 flights60.3%
- Apr–Jun 202678 flights62.2%
Scale runs 50% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, YX 4598 did best on Tuesday at 87.0% on time and worst on Thursday at 50.0%. Each day rests on about 44 flights, so a gap of 37 points is worth noticing but could still narrow in another year.
Delay causes
Why YX 4598 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 65% of the 6,854 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.
- 65%Late-arriving aircraft
- 21%National Airspace System
- 9%Carrier
- 5%Extreme weather
65% 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 6,854 reported delay minutes here, that single category outweighs weather by 12 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 6,854 delay minutes reported on YX 4598.
Cancellations run at 10.06%, against 1.81% nationally. That is about one flight in ten 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. 14.8% 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 502 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 one other city pair in the data, including LGA to CLE (1), but none flew often enough under YX 4598 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LGA to DTW only.
One caution: this is a thin sample. 308 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 YX 4598
For a booking, the cancellation rate is the figure to plan around on YX 4598: 10.06% of its 308 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- LGA to DTW, every carrier and departure
- DTW to LGA, the return direction
- Delta Air Lines 1122 on the same route79.7%
- Delta Air Lines 1231 on the same route96.5%
- Delta Air Lines 999 on the same route71.8%
- Delta Air Lines 1078 on the same route90.4%
- Delta Air Lines 1014 on the same route67.4%
- LaGuardia (LGA) delay statistics
- Detroit Metropolitan Wayne County (DTW) delay statistics
- Republic Airways on-time record
- Every Republic Airways 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 Republic Airways’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.