Flight profile · Republic Airways
YX4726
Indianapolis (IND) to Boston (BOS) · scheduled 6:43 PM – 9:01 PM
How YX4726 performs
675 operations, July 2023 – July 2026.
YX4726 arrived on time 69.3% of the time, against 81.7% for all IND → BOS flights, so this departure is 12.4 percentage points worse than the route as a whole. Against Republic Airways’ own flights on this route it is 12.6 points worse.
Source: US DOT Bureau of Transportation Statistics · 675 operations, July 2023 – July 2026 · If YX4726 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
What stands out
How YX4726 compares to other flight numbers, not just to itself.
This flight runs unusually far behind the carrier's own average on this route, worse than 93% of 11,589 comparable flight numbers.
69.3% on time for this specific departure, against 81.9% for the same carrier's other flights on this route.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · The one thing about this specific departure that ranks most extreme against every other published flight number, out of everything FlyerIntel checks — shown only when something clears a real statistical bar, not for every flight.
Where YX4726 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| YX4726 | 69.3% | 3.41% | -6 min | 14.4% | 675 |
| Republic Airways on IND → BOS | 81.9% | 1.63% | -10 min | 7.4% | 5,891 |
| All IND → BOS flights | 81.7% | 1.62% | -10 min | 7.5% | 6,127 |
YX4726 has cancelled 3.41% of its scheduled departures (23 of 675), against 1.62% for all IND → BOS flights — this specific departure cancels 1.8 percentage points more 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 YX4726 specifically, not about the route it flies.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
Why YX4726 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
crew, maintenance, boarding and fueling, all within the carrier’s control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for YX4726 on IND → BOS. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies YX4726 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, YX4726 pushed back an average of 72 minutes late; when it came in on time or early, an average of 2 minutes late.
Each departure is matched to the flight the same aircraft flew into IND just before it, using the tail number in the DOT file, 611 of 652 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| YX4726 | 25% | 77% | 14% |
| Network, same turn | 18% | 92% | 12% |
The schedule leaves little slack between the inbound landing and this departure, so a late arrival has almost nowhere to go but into the departure.
The network row is every flight with a scheduled turn of 30 to 44 minutes. How often YX4726’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often YX4726 left 15 or more minutes late is lower than the network’s.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
From pushback to gate
When it leaves IND late, does that still matter by the time it reaches BOS?
YX4726 pushes back an average of 20.6 minutes late and reaches the gate at BOS an average of 16.2 minutes late. The 4.4 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. It spends 17.4 minutes on the taxiways at IND, 1.5 minutes longer than a typical IND departure in the same hour.
On arrival at BOS, YX4726 spends 8.3 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 BOS spends on the ground before reaching the gate.
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached BOS. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 10,641 departures from IND scheduled in the clock hour YX4726 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at BOS (440,886 flights), not just YX4726’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
The hour it leaves IND
Part of any flight’s record belongs to the clock rather than to the flight. YX4726 has one departure time, so this is what that time is worth.
On-time arrival rate. 10,641 departures from IND are scheduled in the 6 PM–7 PM hour over the period, against 147,128 across the whole day.
YX4726 is scheduled out of IND at 6:43 PM, in the 6 PM–7 PM bank. Departures from IND in that hour arrive on time 70.2% of the time against 81.9% across the airport’s whole day — the slot alone is worth 11.6 points worse before anything about this particular flight is considered.
The two airport figures cover every departure from IND to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Hours below 120 departures are not scored.
Other routes YX4726 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| BOS→IND Boston to Indianapolis | March 8, 2026 – May 20, 2026 | 63 | — |
| BUF→DCA Buffalo to Washington | December 18, 2025 – January 5, 2026 | 16 | — |
| DCA→ROC Washington to Rochester | September 6, 2025 – October 4, 2025 | 5 | — |
| JFK→CLE New York to Cleveland | March 8–29, 2025 | 4 | — |
| BOS→PHL Boston to Philadelphia | March 6–28, 2025 | 20 | — |
| CHS→PHL Charleston to Philadelphia | February 13, 2025 – March 5, 2025 | 21 | — |
| ORD→BNA Chicago to Nashville | December 21, 2024 – January 4, 2025 | 3 | — |
| PHL→SAV Philadelphia to Savannah | November 23, 2024 | 1 | — |
| SAV→PHL Savannah to Philadelphia | November 23, 2024 | 1 | — |
| DCA→HSV Washington to Huntsville | March 24–31, 2024 | 2 | — |
| HSV→DCA Huntsville to Washington | March 24–31, 2024 | 2 | — |
| LGA→BOS New York to Boston | December 27–29, 2023 | 3 | — |
| CLE→DCA Cleveland to Washington | December 20, 2023 | 1 | — |
| SYR→ORD Syracuse to Chicago | December 9–16, 2023 | 2 | — |
| MHT→PHL Manchester to Philadelphia | November 5, 2023 – December 4, 2023 | 29 | — |
| PHL→MHT Philadelphia to Manchester | November 5, 2023 – December 4, 2023 | 29 | — |
Because the same number has served different journeys, the statistics above describe only the route YX4726 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
79 min late
against a median of 6 min early
YX4726 has an average that understates its risk: a typical arrival is 6 min early, but the worst tenth are 85 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 675 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| YX5631 | Republic Airways | 93.7% | 16 min early | 725 |
| YX4716 | Republic Airways | 89.9% | 9 min early | 1,105 |
| YX4726 this flight | Republic Airways | 69.3% | 6 min early | 675 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. YX4726 is placed in the same ordering rather than left out of it; the rows around it are the most punctual departures on the route, not all of them, so this is a comparison and not a rank. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 675 records of YX4726 operating IND → BOS, 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 excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
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
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