Flight number record
YX 4586
Republic Airways · New York to Indianapolis
- Route
- JFK → IND
- Departs
- 18:51
- Flights
- 260
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s YX 4586, 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 4586 sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.3%. The late ones land an hour and a half behind schedule. That rests on 260 flights, with a median arrival 11 minutes early.
The national on-time rate over the same period is 77.3%, so YX 4586 runs 5 points behind the country as a whole. Across a thousand flights that is about 52 extra late arrivals.
Key figures
On time
72.1%
Arrivals under 15 minutes late, of 247 completed flights
Avg delay
92 min
Across delayed arrivals only, not all flights
Cancelled
5.00%
National rate is 1.89%
1 hour+ late
14.2%
National rate is 8.3%
These figures cover 260 flights between September 2025 and August 2026. Beyond the headline rate, 14.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When YX 4586 flies
YX 4586 flies JFK to IND without a single fixed slot. Its most common scheduled departure was 18:51, used on 44 of 260 flights, with 18:01 (37 flights) and 20:35 (28 flights) next.
- Departs 18:5144 flights16.9%
- Departs 18:0137 flights14.2%
- Departs 20:3528 flights10.8%
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 18:51 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and YX 4586 runs 4 points better at 72.1%. 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
YX 4586 next to JFK to IND
Every carrier on JFK to IND combined arrived on time 76.0% of the time across 973 flights, so YX 4586 is 4 points behind it. Across its whole network Republic Airways managed 78.1%, which this flight trails by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 4586thin sample | 260 | 72.1% | 92 min | 5.00% | C− |
| All Republic Airways on JFK–IND | 973 | 76.0% | 87 min | 5.55% | B− |
| All carriers on JFK–IND | 973 | 76.0% | 87 min | 5.55% | B− |
| Republic Airways, whole network | 364,452 | 78.1% | 74 min | 4.55% | B− |
Across the year
YX 4586 quarter by quarter
YX 4586 did not run the same all year. Its best quarter was Jan–Mar 2026 at 78.0% on time and its weakest Oct–Dec 2025 at 62.4%, 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 202530 flights76.7%
- Oct–Dec 202590 flights62.4%
- Jan–Mar 202690 flights78.0%
- Apr–Jun 202650 flights76.0%
Scale runs 55% to 85%.
By weekday, YX 4586 did best on Monday at 79.4% on time and worst on Tuesday at 59.5%. Each day rests on about 37 flights, so a gap of 20 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late YX 4586 runs when it is late
YX 4586 often beats the schedule: 107 of 247 completed flights, 43%, arrived 15 minutes or more early. When YX 4586 is late it tends to be very late: 35 of its 69 late arrivals were an hour or more behind, and 17 were two hours or more.
- 15+ min early107 flights43.3%
- Within 15 min71 flights28.7%
- 15–29 min late16 flights6.5%
- 30–59 min late18 flights7.3%
- 1–2 hours late18 flights7.3%
- 2+ hours late17 flights6.9%
Scale runs 0% to 100%.
Share of 247 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 64 departures that left 15 minutes late or more, only 6 made it up before arrival. 11 flights left on time and still arrived late.
The worst days
Worst days for YX 4586
The latest arrival of the period was on 24 April 2026, 12 hours behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 24 April 2026 | 12 hours | Carrier |
| 5 May 2026 | 4 hours 42 minutes | Late-arriving aircraft |
| 19 December 2025 | 4 hours 11 minutes | Late-arriving aircraft |
| 20 May 2026 | 4 hours 8 minutes | Late-arriving aircraft |
| 27 January 2026 | 3 hours 49 minutes | Carrier |
Delay causes
Why YX 4586 runs late
Late-arriving aircraft accounts for 55% of the 6,362 delay minutes carriers reported here, and the remaining four split what is left.
- 55%Late-arriving aircraft
- 24%Carrier
- 16%National Airspace System
- 4%Extreme weather
- 1%Security
55% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 6,362 reported delay minutes here, that single category outweighs weather by 12 to one. The split is drawn from 6,362 delay minutes reported on YX 4586.
Cancellations run at 5.00%, against 1.89% nationally. That is about one flight in twenty 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
14.2% 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 665 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 two other city pairs in the data, including CHS to LGA (58) and JFK to DCA (26), but none flew often enough under YX 4586 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to JFK to IND only.
One caution: this is a thin sample. 260 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 4586
For a booking, the cancellation rate is the figure to plan around on YX 4586: 5.00% of its 260 scheduled flights did not operate. A late arrival costs an hour and a half, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- JFK to IND, every carrier and departure
- IND to JFK, the return direction
- John F. Kennedy International (JFK) delay statistics
- Indianapolis International (IND) 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.