Flight profile · Republic Airways
YX4579
New York (LGA) to Pittsburgh (PIT) · scheduled 9:59 AM – 11:44 AM
How YX4579 performs
620 operations, September 2024 – August 2026.
Between its first and last recorded date on LGA → PIT, YX4579 averaged about 6 operations a week (620 in 727 days, cancelled ones included).
YX4579 arrived on time 82.3% of the time, level with the 82.1% for all LGA → PIT flights: on arrival punctuality it is a typical departure on this route, neither better nor worse.
Source: US DOT Bureau of Transportation Statistics · 620 operations, September 2024 – August 2026 · If YX4579 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where YX4579 is right now
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| YX4579 | 82.3% | 1.77% | -9 min | 6.2% | 620 |
| Republic Airways on LGA → PIT | 82.2% | 3.81% | -13 min | 8.0% | 7,883 |
| All LGA → PIT flights | 82.1% | 3.82% | -13 min | 8.1% | 9,666 |
YX4579 has cancelled 1.77% of its scheduled departures (11 of 620), against 3.82% for all LGA → PIT flights — this specific departure cancels 2.0 percentage points less often than the route as a whole. Different flight numbers on the same route can carry different aircraft, crews and schedules, so this is a fact about YX4579 specifically, not about the route it flies.
6.2% of YX4579’s arrivals were an hour or more late, against 8.1% across LGA → PIT, so the long delays are less common on this number than on the route.
Source: FlyerIntel analysis of US DOT BTS data · September 2024 – August 2026
Why YX4579 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for YX4579 on LGA → PIT. Only delays of 15 minutes or more are attributed. What the five causes mean
Source: US DOT Bureau of Transportation Statistics · Data covering September 2024 – August 2026
Does a late aircraft delay this flight?
How often the plane that flies YX4579 comes in late, and what that does to the departure.
The aircraft flying YX4579 came in 15 or more minutes late on 16% of the departures where its previous flight is known. There are not enough departures in both groups to say how the flight left after a late one and after an on-time one.
Matched by tail number to the aircraft’s previous flight into LGA: 496 of 612 departures. Unknown, cancelled or diverted inbounds and gaps over 12 hours are left out.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late |
|---|---|
| YX4579 | 16% |
| Network, same turn | 18% |
51 scheduled minutes is enough to clean and board when the aircraft is on time, with little to spare when it is not.
The network row is every flight with a scheduled turn of 45 to 59 minutes. How often YX4579’s aircraft landed 15 or more minutes late is about the same as the network’s. There are not enough departures in both groups to compare how it left.
Source: US DOT Bureau of Transportation Statistics · Data covering September 2024 – August 2026
From pushback to gate
When it leaves LGA late, does that still matter by the time it reaches PIT?
YX4579 pushes back an average of 6.8 minutes late and reaches the gate at PIT an average of 3.6 minutes late. The 3.2 minutes between those two figures are slack the published schedule already carries, so a late pushback is partly, not fully, made up before the gate. It spends 23.3 minutes on the taxiways at LGA, 2.2 minutes shorter than a typical LGA departure in the same hour.
On arrival at PIT, YX4579 spends 7.3 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is about what any arrival at PIT spends on the ground before reaching the gate.
Taxi-out is gate to wheels up and sits inside the scheduled block; the hourly comparison is 32,453 LGA departures. Taxi-in is landing to gate, set against 136,657 arrivals at PIT. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · September 2024 – August 2026
The hour it leaves LGA
YX4579 has one departure time, 9:59 AM, so this is what that hour at LGA is worth.
On-time arrival rate. 32,453 departures from LGA are scheduled in the 9 AM–10 AM hour over the period, against 467,462 across the whole day.
YX4579 is scheduled out of LGA at 9:59 AM, in the 9 AM–10 AM bank. Departures from LGA in that hour arrive on time 85.0% of the time against 78.1% across the airport’s whole day — the slot alone is worth 7.0 points better before anything about this particular flight is considered.
Both airport figures cover every destination from LGA, so they describe the slot, not this journey; the route comparison is above. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · September 2024 – August 2026 · Hours below 120 departures are not scored.
Other routes YX4579 has flown
Carriers reassign flight numbers. YX4579 also served these 14 other city pairs in the period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| ATL→LGA Atlanta to New York | April 7, 2026 – May 20, 2026 | 44 | — |
| LGA→ATL New York to Atlanta | April 7, 2026 – May 20, 2026 | 44 | — |
| BOS→LGA Boston to New York | December 3–16, 2025 | 14 | — |
| PIT→LGA Pittsburgh to New York | September 3, 2025 – October 5, 2025 | 28 | — |
| JFK→ORF New York to Norfolk | September 7, 2024 – October 5, 2024 | 5 | — |
| LGA→DAY New York to Dayton | May 6, 2024 – June 4, 2024 | 30 | — |
| DAY→PHL Dayton to Philadelphia | April 6, 2024 – May 4, 2024 | 5 | — |
| LGA→MIA New York to Miami | January 13, 2024 – March 30, 2024 | 12 | — |
| MIA→LGA Miami to New York | January 13, 2024 – February 10, 2024 | 5 | — |
| ORD→BNA Chicago to Nashville | December 23, 2023 – January 6, 2024 | 3 | — |
| ORD→SDF Chicago to Louisville | December 9–16, 2023 | 2 | — |
| PHL→PVD Philadelphia to Providence/Warwick | November 5, 2023 – December 4, 2023 | 28 | — |
| PVD→PHL Providence/Warwick to Philadelphia | November 5, 2023 – December 4, 2023 | 28 | — |
| DCA→BDL Washington to Hartford | October 5, 2023 – November 4, 2023 | 31 | — |
The figures above describe only LGA → PIT, the route YX4579 flies now.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
36 min late
against a median of 9 min early
Percentiles over 620 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering September 2024 – August 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| YX5694 | Republic Airways | 88.3% | 15 min early | 606 |
| YX4579 this flight | Republic Airways | 82.3% | 9 min early | 620 |
| YX5722 | Republic Airways | 73.9% | 15 min early | 679 |
Among all 3 departures on this route with at least 600 operations, YX4579 has the 2nd highest on-time rate, 6.0 points behind the best. Every departure here has at least 600 operations; the other rows are the most punctual on the route, not all of them.
Data and methodology
Calculated by FlyerIntel from 620 records of YX4579 operating LGA → PIT, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule; cancelled and diverted flights are reported separately, not in the on-time rate.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
Analysis last recomputed