Flight number record
YX 4449
Republic Airways · New York to Indianapolis
- Route
- JFK → IND
- Departs
- 15:59
- Flights
- 275
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s YX 4449, 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 4449 sits in the middle of the pack with a B−. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 275 flights, with a median arrival 8 minutes early.
Key figures
On time
75.2%
Arrivals under 15 minutes late, of 258 completed flights
Avg delay
78 min
Across delayed arrivals only, not all flights
Cancelled
6.18%
National rate is 1.81%
1 hour+ late
12.8%
National rate is 8.1%
These figures cover 275 flights between July 2025 and June 2026. Beyond the headline rate, 12.8% 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 4449 flies
YX 4449 flies JFK to IND without a single fixed slot. Its most common scheduled departure was 15:59, used on 52 of 275 flights, with 16:05 (31 flights) and 16:59 (31 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 15:5952 flights18.9%
- Departs 16:0531 flights11.3%
- Departs 16:5931 flights11.3%
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 15:59 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and YX 4449 runs 3 points better at 75.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
YX 4449 next to JFK to IND
Every carrier on JFK to IND combined arrived on time 76.1% of the time across 1,000 flights, so YX 4449 is about level with it. Across its whole network Republic Airways managed 78.5%, which this flight trails by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 4449thin sample | 275 | 75.2% | 78 min | 6.18% | B− |
| All Republic Airways on JFK–IND | 1,000 | 76.1% | 85 min | 4.60% | B− |
| All carriers on JFK–IND | 1,000 | 76.1% | 85 min | 4.60% | B− |
| Republic Airways, whole network | 361,482 | 78.5% | 72 min | 4.08% | B− |
Across the year
YX 4449 quarter by quarter
YX 4449 did not run the same all year. Its best quarter was Apr–Jun 2026 at 89.5% on time and its weakest Oct–Dec 2025 at 72.5%, a swing of 17 points on roughly 69 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 202592 flights72.9%
- Oct–Dec 202582 flights72.5%
- Jan–Mar 202660 flights72.7%
- Apr–Jun 202641 flights89.5%
Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, YX 4449 did best on Tuesday at 84.2% on time and worst on Sunday at 66.7%. Each day rests on about 39 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Delay causes
Why YX 4449 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 59% of the 5,010 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.
- 59%Late-arriving aircraft
- 27%National Airspace System
- 7%Extreme weather
- 7%Carrier
59% 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 5,010 reported delay minutes here, that single category outweighs weather by 9 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 5,010 delay minutes reported on YX 4449.
Cancellations run at 6.18%, against 1.81% nationally. That is about one flight in fifteen 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. 12.8% 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 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. 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 five other city pairs in the data, including LGA to GSP (42), GSP to LGA (42) and DCA to IND (30), but none flew often enough under YX 4449 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. 275 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 4449
For a booking, the cancellation rate is the figure to plan around on YX 4449: 6.18% of its 275 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
- JFK to IND, every carrier and departure
- IND to JFK, the return direction
- Republic Airways 4586 on the same route71.1%
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.